Local

acct-user/apache

acct-user/git

gitea

Set home directory for git hosting via www-apps/gitea.

gitolite

Set home directory for git hosting via dev-vcs/gitolite or dev-vcs/gitolite-gentoo.

acct-user/nginx

icingaweb2

Prepare group membership for www-apps/icingaweb2

mgraph

Prepare group membership for net-mail/mailgraph

acct-user/vdr

app-accessibility/at-spi2-core

dbus-broker

Use DBus broker implementation instead of default DBus daemon

app-accessibility/brltty

api

build brltty's application program interface

beeper

support the console tone generator

fm

support for the sound card synthesizer

louis

Use braille translator dev-libs/liblouis

midi

support the musical instrument digital interface

pcm

support for sound card digital audio

app-accessibility/emacspeak

espeak

Adds support for the espeak tts engine

app-accessibility/espeak-ng

async

Enables asynchronous commands

klatt

Enables Klatt formant synthesis and implementation

l10n_ru

Builds extended Russian Dictionary file

l10n_zh

Builds extended Chinese (Mandarin and Cantonese) Dictionary files

man

Builds and installs manpage with app-text/ronn-ng

mbrola

Adds support for mbrola voices

app-accessibility/flite

voices

Install synthetic voices

app-accessibility/freetts

jsapi

build Java Speech API (JSAPI)

mbrola

Adds support for mbrola voices

app-accessibility/orca

braille

Enable braille support

app-accessibility/speech-dispatcher

espeak

Adds support for espeak-ng speech engine

flite

Adds support for flite speech engine

app-admin/clsync

apidoc

Provide doxygen generated API docs.

cgroups

Use cgroups to limit /dev access.

clsync

Build clsync binary. Most likely you want it. However it is possible to build only libclsync without clsync itself.

cluster

Enable clustering support (allows master-master clsync on multiple hosts). Not fully implemented yet.

control-socket

Enable AF_UNIX control socket support.

extra-debug

Enable extra debugging. This will hurt performance badly. Be ready for tons of output.

extra-hardened

Enable extra security checks. This will hurt performance.

gio

Enable GIO for FS monitoring (glib based alternative to inotify interface, not recommended; if both are compiled, may be selected at runtime).

highload-locks

Allows to use spinlocks for short delays instead of mutexes, but only on SMP systems.

namespaces

Enable namespaces isolation.

socket-library

Build the control and monitoring socket library: libclsync.

app-admin/conky

apcupsd

Enable support for sys-power/apcupsd

bundled-toluapp

Enable support for bundled toluapp. This only makes sense in combination with the lua-* flags

cmus

Enable monitoring of music played by media-sound/cmus

colour-name-map

Include mappings of colour name

extras

Enable syntax highlighting for app-editors/nanoand app-editors/vim

ical

Enable support for events from iCalendar (RFC 5545) files using dev-libs/libical

intel-backlight

Enable support for Intel backlight

iostats

Enable support for per-task I/O statistics

irc

Enable support for displaying everything from an irc channel using net-libs/libircclient

lua-cairo

Enable if you want Lua Cairo bindings

lua-cairo-xlib

Enable support for Cairo and Xlib interoperability for Lua

lua-imlib

Enable if you want Lua Imlib2 bindings

lua-rsvg

Enable if you want Lua RSVG bindings

math

Enable support for glibc's libm math library

moc

Enable monitoring of music played by media-sound/moc

mouse-events

Enable support for mouse events"

mpd

Enable monitoring of music controlled by media-sound/mpd

nvidia

Enable reading of nvidia card temperature sensors via x11-drivers/nvidia-drivers

portmon

Enable support for tcp (ip4) port monitoring

thinkpad

Enable support for IBM/Lenovo notebooks

webserver

Enable support to act as a webserver serving conkys output using net-libs/libmicrohttpd

xinput

Enable support for Xinput 2 (slow)

xmms2

Enable monitoring of music played by media-sound/xmms2

app-admin/conserver

freeipmi

Compile in FreeIPMI support via sys-libs/freeipmi

app-admin/diradm

automount

Support for automount data in LDAP

irixpasswd

Support for storing separate IRIX passwords

app-admin/doas

persist

Adds support for "persist" feature (experimental)

app-admin/gkrellm

gnutls

Enable SSL support for mail checking with net-libs/gnutls (overrides 'ssl' USE flag)

lm-sensors

Enable monitoring sensors via sys-apps/lm-sensors

ntlm

Enable NTLM authentication for mail checking with net-libs/libntlm

ssl

Enable SSL support for mail checking with dev-libs/openssl

X

Build both the X11 gui (gkrellm) and the server (gkrellmd). Disabling this flag builds the server only

app-admin/gtkdiskfree

gtk2

Support GTK+ 2.x instead of GTK+ 3.x

app-admin/hddtemp

network-cron

Monthly cronjob to update hddtemp.db.

app-admin/keepass

aot

Generate native code at build time, rather than runtime.

app-admin/keepassxc

autotype

Add support to autotype the passwords into other applications

browser

Enables browser plugin support

keeshare

Enable KeeShare sharing integration

keyring

Enable support for use as the the system keyring

network

Enable network support

ssh-agent

Use KeePassXC to unlock SSH keys

yubikey

Enable database unlocking via hardware keys supporting YubiKey-style HMAC-SHA1 protocol

app-admin/lnav

pcap

Enable support for pcap files.

app-admin/logcheck

cron

Adds file to enable hourly cron job to run logcheck"

app-admin/logrotate

acl

Installs acl support

cron

Installs cron file

selinux

Installs Security Enhanced Linux support

app-admin/logstash-bin

x-pack

Enable additional features (may need a license)

app-admin/openrc-settingsd

systemd

Use the versions of dbus and polkit files provided by sys-apps/systemd

app-admin/pass

dmenu

Add support for x11-misc/dmenu with the 'passmenu' program.

git

Use dev-vcs/git for password revisions.

importers

Allow importing passwords from other password managers using various contributed scripts.

X

Use x11-misc/xclip to copy passwords to the clipboard.

app-admin/pass-otp

qrcode

Add support for qrcodes using media-gfx/qrencode

app-admin/passwordsafe

qr

Enable QR code password display

xml

Enable XML import support

yubikey

Enable support for Yubikey

app-admin/perl-cleaner

pkgcore

Use sys-apps/pkgcore instead of sys-apps/portage and app-portage/portage-utils.

app-admin/puppet

augeas

Enable augeas support

diff

Enable diff support

hiera

Enable hiera support

rrdtool

Enable rrdtool support

shadow

Enable shadow support

app-admin/puppet-agent

puppetdb

Adds puppetdb support

app-admin/puppetserver

puppetdb

Adds support for connecting to puppetdb

app-admin/pwgen

livecd

Install init script for root password scrambling on boot

app-admin/rsyslog

clickhouse

Build the ClickHouse output module (requires net-misc/curl)

curl

Enable http_request() function in RainerScript (requires net-misc/curl)

dbi

Build the general database output module (requires dev-db/libdbi)

elasticsearch

Build the Elasticsearch output module (requires net-misc/curl)

gcrypt

Add support for encrypted log files using dev-libs/libgcrypt

gnutls

Build the GnuTLS network stream driver (requires net-libs/gnutls)

imhttp

Build the http input module (requires www-servers/civetweb)

impcap

Build the pcap input module (requires net-libs/libpcap)

kafka

Build the Apache Kafka input/output module (requires dev-libs/librdkafka)

kerberos

Build the GSSAPI input and output module (requires virtual/krb5)

kubernetes

Build the kubernetes modify plugin (requires net-misc/curl)

mdblookup

Build the MaxMind DB lookup message modify plugin using dev-libs/libmaxminddb

mongodb

Build the MongoDB output module (requires dev-libs/mongo-c-driver)

mysql

Build the MySQL database output module (requires virtual/mysql)

normalize

Build the normalize modify module (requires dev-libs/libee and dev-libs/liblognorm)

omhttp

Build the http output module (requires net-misc/curl)

omhttpfs

Build the httpfs output module (requires net-misc/curl)

omudpspoof

Build the udpspoof output module (requires net-libs/libnet)

openssl

Build the OpenSSL network stream driver (requires dev-libs/openssl)

postgres

Build the PostgreSQL database output module (requires dev-db/postgresql)

rabbitmq

Build the RabbitMQ output module (requires net-libs/rabbitmq-c)

redis

Build the Redis output module using (requires dev-libs/hiredis)

relp

Build the Reliable Event Logging Protocol (RELP) output module (requires dev-libs/librelp)

rfc3195

Build the rfc3195 input module (requires dev-libs/liblogging)

rfc5424hmac

Build the rfc5424hmac modify module (requires dev-libs/openssl)

snmp

Build the snmp modify and output module (requires net-analyzer/net-snmp)

ssl

Add support for encrypted client/server communication (requires net-libs/gnutls)

systemd

Build the journal input and output module (requires sys-apps/systemd)

uuid

Include UUIDs in messages (requires sys-apps/util-linux)

xxhash

Enable xxHash support in fmhash module (requires dev-libs/xxhash)

zeromq

Build the ZeroMQ input and output modules (requires net-libs/czmq)

app-admin/sagan

libdnet

Add support for dev-libs/libdnet

pcap

Add support for network packet capture via net-libs/libpcap

redis

Add support for the Redis database via dev-libs/hiredis

smtp

Build witch SMTP (E-Mail) support

app-admin/salt

cheetah

Enable support for dev-python/cheetah3

cherrypy

Enable support for using cherrypy.

genshi

Enable support for dev-python/genshi

gnupg

Enable support for gnupg via python-gnupg.

libcloud

Enable salt-cloud support via libcloud.

libvirt

Support managing virtual machines with app-emulation/libvirt.

mako

Add support for using the mako template engine for parsing salt states.

mongodb

Support returning data to a mongodb server.

neutron

Support the OpenStack neutron network service.

nova

Enable support for the OpenStack Nova API

openssl

Add support for using TLS via OpenSSL.

portage

Add support for package state enforcement using sys-apps/portage

raet

Add support for the new RAET transport.

redis

Support returning data to a redis database.

zeromq

Add support for the zeromq transport.

app-admin/sudo

gcrypt

Use message digest functions from dev-libs/libgcrypt instead of sudo's

offensive

Let sudo print insults when the user types the wrong password

secure-path

Replace PATH variable with compile time secure paths

sendmail

Allow sudo to send emails with sendmail

sssd

Add System Security Services Daemon support

app-admin/sysklogd

logger

Build the logger program

logrotate

use app-admin/logrotate for rotating logs rather than custom cron scripts

app-admin/syslog-ng

amqp

Enable support for AMQP destinations

geoip2

Add support for geo lookup based on IPs via dev-libs/libmaxminddb

grpc

Enable GRPC based driver support (OpenTelemetry) via net-libs/grpc

http

Enable support for HTTP destinations

json

Enable support for JSON template formatting via dev-libs/json-c

kafka

Enable support for Kafka destinations

mongodb

Enable support for mongodb destinations

mqtt

Enable MQTT support via net-libs/paho-mqtt-c

pacct

Enable support for reading Process Accounting files (EXPERIMENTAL, Linux only)

redis

Enable support for Redis destinations

smtp

Enable support for SMTP destinations

spoof-source

Enable support for spoofed source addresses

app-admin/sysstat

dcron

Adjust cronjobs to work properly under sys-process/dcron

app-admin/testdisk

ewf

Include ewf library

ntfs

Include the ability to read NTFS filesystems

reiserfs

Include reiserfs reading ability

sudo

Enable sudo helper integration

app-admin/tripwire

ssl

Adds support for Secure Socket Layer connections

static

Builds the package statically

tools

Installs app-admin/mktwpol, providing scripts for the installation/setup of tripwire, including generating the tripwire policy file and maintenance of the tripwire database

app-admin/ulogd

json

Build JSON output plugin to save packets in JSON file format

nfacct

Build NFACCT input plugin to support traffic accounting via nfnetlink_acct

nfct

Build NFCT input plugin to support stateful flow-based logging via nfnetlink_conntrack

nflog

Build NFLOG input plugin to support stateless packet-based logging via nfnetlink_log

pcap

Build PCAP output plugin to save packets in libpcap file format

ulog

Build ULOG input plugin to support deprecated packet-based logging via ULOG target

app-admin/vault

webui

Enable the Web UI

app-admin/webalizer

xtended

Include the 404 extension

app-admin/webapp-config

portage

Propagate python_targets dependencies to sys-apps/portage

app-alternatives/awk

busybox

Symlink to sys-apps/busybox

gawk

Symlink to sys-apps/gawk

mawk

Symlink to sys-apps/mawk (warning: mawk is not fully POSIX-compliant)

nawk

Symlink to sys-apps/nawk

app-alternatives/bc

gh

Symlink to bc-gh from sci-calculators/bc-gh

gnu

Symlink to GNU bc (sys-devel/bc)

app-alternatives/bzip2

lbzip2

Symlink to app-arch/lbzip2.

pbzip2

Symlink to app-arch/pbzip2.

reference

Symlink to app-arch/bzip2.

app-alternatives/cpio

gnu

Symlink to GNU cpio (app-arch/cpio)

libarchive

Symlink to bsdcpio from app-arch/libarchive

app-alternatives/gzip

pigz

Symlink to app-arch/pigz.

reference

Symlink to app-arch/gzip.

app-alternatives/lex

flex

Symlink to sys-devel/flex.

reflex

Symlink to sys-devel/reflex.

app-alternatives/ninja

reference

Symlink to dev-build/ninja.

samurai

Symlink to dev-build/samurai.

app-alternatives/sh

bash

Symlink to app-shells/bash

busybox

Symlink to sys-apps/busybox

dash

Symlink to app-shells/dash

ksh

Symlink to app-shells/ksh

lksh

Symlink to lksh from app-shells/mksh

mksh

Symlink to mksh from app-shells/mksh

app-alternatives/tar

gnu

Symlink to GNU tar (app-arch/tar)

libarchive

Symlink to bsdtar from app-arch/libarchive

app-alternatives/yacc

bison

Symlink to app-alternatives/yacc.

byacc

Symlink to dev-util/byacc.

reference

Symlink to dev-util/yacc.

app-antivirus/clamav

clamapp

Build applications (clamscan, clamd, clamdscan, clamonacc (also has its own USE flag), sigtool, clambc, clamav-milter (also requires milter USE flag), clamdtop, clamsubmit, clamconf).

clamdtop

A Top like tool which shows what clamd is currently scanning amongst other things

clamonacc

Build the clamonacc on-access scanner

clamsubmit

A tool to submit false positives / negatives

experimental

Enable experimental features

libclamav-only

Bypass building of libfreshclam and the ClamAV CLI applications.

metadata-analysis-api

Enables collection of file property metadata using ClamAV API for analysis by ClamAV bytecode programs.

rar

RAR support

system-mspack

Use dev-libs/libmspack instead of the version bundled with ClamAV

xml

DMG and XAR support

app-antivirus/clamtk

kde

Install the Dolphin plugin.

nautilus

Install the Nautilus plugin.

nemo

Install the Nemo plugin.

thunar

Install the Thunar plugin.

app-arch/7zip

jwasm

Use dev-lang/jwasm to include optimized code (doesn't support AES)

rar

Enable support for non-free rar decoder

uasm

Use dev-lang/uasm to include optimized code

app-arch/cabextract

extras

Install experimental extra tools: wince_info and wince_rename for examining and processing Windows CE installation cabinet header files; cabinfo for examining the structure of a cab file.

app-arch/createrepo_c

legacy

Build with support for legacy weakdeps and hashes (not recommended!)

app-arch/dpkg

libmd

Use app-crypt/libmd library for message digest functions

update-alternatives

Install update-alternatives

app-arch/dump

ermt

encrypted rmt support

uuid

Enable UUID support

app-arch/engrampa

caja

Enable engrampa to integrate with mate-base/caja by providing entries in its context menu

app-arch/file-roller

nautilus

Build contextual menu extension for gnome-base/nautilus.

app-arch/gzip

pic

disable optimized assembly code that is not PIC friendly

app-arch/innoextract

debug

Enable debug logging and the --debug command-line option

lzma

Enable support for extracting lzma-compressed installers using app-arch/xz-utils

app-arch/libarchive

blake2

Enable Blake2 hash support via app-crypt/libb2.

bzip2

Allow accessing bzip2-compressed archives through libbz2 (which comes with app-arch/bzip2). This only affects libarchive's native support: bsdtar will keep using bunzip2 as a filter if that's not built-in.

e2fsprogs

Use file flags from sys-fs/e2fsprogs headers instead of virtual/os-headers headers

nettle

Use dev-libs/nettle as crypto backend

app-arch/libdeflate

test

Build the test programs (requires sys-libs/zlib)

utils

Build the libdeflate-gzip program

app-arch/lrzip-next

largefile

Enables support for large files

year2038

Enables support for 64-bit 'time_t' (sets D_TIME_BITS=64; glibc only)

app-arch/p7zip

natspec

Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.

rar

Enable support for non-free rar decoder

app-arch/rar

all-sfx

Install all SFX (Self-Extracting) files rather than just the native format (allows creation of Windows EXEs on Linux ELF systems)

app-arch/rpm

sequoia

Use app-crypt/rpm-sequoia instead of the deprecated internal parser

app-arch/tar

minimal

just install `tar`

app-arch/unzip

natspec

Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.

app-arch/wimlib

fuse

Use fuse libraries

iso

Install app-cdr/cdrtools in order to prepare iso images

ntfs

Use libntfs-3g library from sys-fs/ntfs3g

yasm

Use yasm assembler instead of nasm

app-arch/xz-utils

extra-filters

Build additional filters that are not used in any of the default xz presets. This includes delta and BCJ coders, additional match finders and SHA256 checks.

pgo

Optimize the build using Profile Guided Optimization (PGO)

app-arch/zip

natspec

Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.

app-backup/amanda

ndmp

Support for the NDMP protocol

s3

Support for backing up to the Amazon S3 system

xfs

Support for backing up raw XFS filesystems using xfsdump

app-backup/backup-manager

s3

Support for backing up to the Amazon S3 system

app-backup/bacula

bacula-clientonly

Disable DB support, and just build a client

bacula-nodir

Disable building of director

bacula-nosd

Disable building of storage daemon

batch-insert

Enable batch insert into data base

ipv6

Support IPV6 protocol"

logwatch

Install support files for logwatch

app-backup/bareos

ceph

Enable sys-cluster/ceph support

clientonly

Only install file-daemon (client)

director

Install director

glusterfs

Enable sys-cluster/glusterfs storage backend

lmdb

enable build of dev-db/lmdb support for faster accurate backup

logwatch

Install support files for sys-apps/logwatch

ndmp

Enable support for NDMP (Network Data Management Protocol)

scsi-crypto

Enable low level SCSI crypto support

storage-daemon

Install storage daemon (bareos-sd)

vmware

Enable bareos-fd VMware plugin

app-backup/borgmatic

apprise

Allow backup monitoring to send notification to a wide variety of services, using dev-python/apprise

app-backup/btrbk

lsbtr

Enable the lsbtr command-line tool

mbuffer

Use sys-block/mbuffer to enable progress bar and buffering/limiting functionality

app-backup/dar

argon2

Enable password hashing algorithm from app-crypt/argon2

dar32

Enables --enable-mode=32 option, which replace infinite by 32 bit integers

dar64

Enables --enable-mode=64 option, which replace infinite by 64 bit integers

gcrypt

Enables strong encryption support

gpg

Enables usage of asymmetric encryption algorithms

rsync

Enables linking with net-libs/librsync for delta compression support

app-backup/duplicity

s3

Support for backing up to the Amazon S3 system

app-backup/rear

udev

Have ReaR start backup when attaching your USB drive.

app-backup/snapper

lvm

Enable LVM thinprovisioned snapshots support sys-fs/lvm2

xattr

Add support for getting and setting POSIX extended attributes, through sys-apps/attr.

app-backup/tsm

tsm-cit

IBM Tivoli Common Inventory Technology

tsm-hw

Difference snapshot support for NetApp and N-Series file servers

vmware

Install vmware data protection support

app-benchmarks/filebench

auto-completion

Enable command-line autocompletion using dev-libs/libtecla

app-benchmarks/httperf

idleconn

Build with the idleconn program

app-benchmarks/ioping

netdata

Add support for netdata

app-benchmarks/ramspeed

pic

Force shared libraries to be built as PIC (this is slower)

app-benchmarks/stress-ng

keyutils

Stress test the kernel's key generation facilities via sys-apps/keyutils

app-benchmarks/sysbench

aio

Add support for AIO.

attachsql

Add support for AttachSQL.

drizzle

Add support for Drizzles.

largefile

Add support for large files.

app-cdr/brasero

libburn

Enable dev-libs/libburn backend

nautilus

Build the gnome-base/nautilus extension

playlist

Enable support for playlists through dev-libs/totem-pl-parser

tracker

Enable audio playlist search using the app-misc/tracker indexer

app-cdr/cdemu

cdemu-daemon

Pull app-cdr/cdemu-daemon dependency, useful in chroot environment (bug #315491). Do not disable until you know what you are doing.

app-cdr/dvdisaster

debug

Enable memory debugging.

app-cdr/gaffitter

scripts

Install additional gaffitter scripts for external programs

app-cdr/mirage2iso

pinentry

Support app-crypt/pinentry password input backend.

app-containers/apptainer

network

Install network plug-ins

suid

Install SUID helper binary

app-containers/buildah

btrfs

Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.

app-containers/containerd

btrfs

Support for BTRFS snapshot driver

cri

Support for Kubernetes CRI

device-mapper

Support for device mapper snapshot driver

app-containers/cri-o

btrfs

Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.

device-mapper

Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags.

app-containers/crun

bpf

Enable in Kernel, eBPF (enhanced Berkley Packet Filter) support for managing device controllers.

criu

Enable CRIU based checkpoint/restore support

app-containers/docker

btrfs

Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.

container-init

Makes the a staticly-linked init system tini available inside a container.

overlay

Enables dependencies for the "overlay" graph driver, including necessary kernel flags.

overlay2

Enables dependencies for the "overlay2" graph driver, including necessary kernel flags.

app-containers/docker-credential-helpers

pass

Build pass helper for the pass utility.

app-containers/incus

fuidshift

Install the fuidshift binary - currently conflicts with app-containers/lxd

qemu

Pull dependencies needed to manage QEMU-based virtual machines with Incus

app-containers/lxc

io-uring

Enable io_uring support, and use io_uring instead of epoll

tools

Build and install additional command line tools

app-containers/nerdctl

rootless

Enables dependencies for running in rootless mode.

app-containers/podman

btrfs

Enables btrfs support (graph driver) in Podman

wrapper

Install wrapper which lets use podman for command `docker`

app-containers/runc

kmem

Enable Kernel Memory Accounting.

app-containers/skopeo

btrfs

Enables dependencies for the "btrfs" graph driver.

device-mapper

Compiles with libdevmapper

rootless

Compiles with libsubid

app-containers/snapd

forced-devmode

Automatically disable application confinement if feature detection fails.

app-crypt/aespipe

cpu_flags_x86_padlock

Use VIA padlock instructions, detected at run time, code still works on non-padlock processors

app-crypt/badkeys

dkim

Enable dkim scan mode via dev-python/dnspython.

ssh

Enable ssh scan mode via dev-python/paramiko.

app-crypt/ccid

twinserial

Enable twinserial reader

app-crypt/codecrypt

cryptopp

Build algorithms that need Crypto++ support dev-libs/crypto++

app-crypt/dehydrated

cron

Install cron job to sign/renew non-existent/changed/expiring certificates

app-crypt/eid-mw

dialogs

Enable "askaccess" dialog box, by using x11-libs/gtk+

gtk

All dialogs are available, by using x11-libs/gtk+

p11-kit

Support for app-crypt/p11-kit.

app-crypt/ekeyd

minimal

Only install the ekey-egd-linux service rather than the full ekeyd package.

munin

Install a plugin for net-analyzer/munin to graph statistical data from ekeyd.

usb

Build the libusb-based userland daemon for accessing the EntropyKey (alternative to the CDC USB driver). It is suggested to use this option by default, as the CDC driver in the kernel often seems to be fragile (or the gadget implementation on the EntropyKey is too buggy), and can cause various problems.

app-crypt/gnupg

smartcard

Build scdaemon software. Enables usage of OpenPGP cards. For other type of smartcards, try app-crypt/gnupg-pkcs11-scd. Bring in dev-libs/libusb as a dependency; enable scdaemon.

tofu

Enable support for Trust on First use trust model; requires dev-db/sqlite.

tools

Install extra tools (including gpgsplit and gpg-zip).

tpm

Enable TPM support via app-crypt/tpm2-tss and build tpm2d.

usb

Build direct CCID access for scdaemon; requires dev-libs/libusb.

user-socket

try a socket directory which is not removed by init manager at session end

wks-server

Install the wks-server

app-crypt/gnupg-pkcs11-scd

proxy

Build the gnupg-pkcs11-scd-prox

app-crypt/gpgme

common-lisp

Install common-lisp files

app-crypt/hashcat

brain

Enable the hashcat brain

app-crypt/heimdal

hdb-ldap

Adds support for LDAP as a database backend

lmdb

Add support for using dev-db/lmdb for lookup tables

otp

Adds support for one-time passwords

app-crypt/ima-evm-utils

tpm

Enable TPM support

app-crypt/johntheripper-jumbo

opencl

Build with opencl/GPU cracking support

pcap

Build with pcap support

app-crypt/keybase

fuse

Enable app-crypt/kbfs support

app-crypt/kstart

afs

Enables afs support which means you can acquire an afs token and set PAGs. It's recommended to set this USE if you need authenticated access to an AFS cell for your daemon/app.

app-crypt/libb2

native-cflags

Use CFLAGS as determined by configure script. These flags will enable all CPU specific features it find available, to further optimise the implementation. This discards any existing CFLAGS set in make.conf or similar.

app-crypt/libsecret

crypt

Enable transport encryption

gcrypt

Enable Backend library to implement transport encryption via dev-libs/libgcrypt

gnutls

Enable Backend library to implement transport encryption via net-libs/gnutls

pam

Build PAM module

tpm

Enable Trusted Platform Module support via app-crypt/tpm2-tss

app-crypt/libu2f-host

systemd

Use user ACLs rather than plugdev group to give user access to the HIDRAW device.

app-crypt/mit-krb5

doc

Creates and installs the API and implementation documentation. This is only useful if you want to develop software which depends on kerberos

keyutils

Enable for the keyring ccache using keyutils

lmdb

Add support for using dev-db/lmdb for lookup tables

openldap

Enable support for ldap as a database backend

pkinit

Enable pkinit support for the initial ticket

app-crypt/mkp224o

pcre

Search with a regex instead of prefix/suffix matching

app-crypt/onak

dynamic

Support for dynamic loading of backends

hkp

Proxying backend support

app-crypt/ophcrack

tables

Require the additional tables used to carry out cracking (app-crypt/ophcrack-tables)

app-crypt/ophcrack-tables

vistafree

Installs the free Vista ophcrack tables

xpfast

Installs the fast XP ophcrack tables

xpsmall

Installs the small free XP ophcrack tables

app-crypt/pinentry

efl

Build dev-libs/efl based pinentry

app-crypt/qca

botan

Enable botan plugin

gcrypt

Enable gcrypt plugin

gpg

Enable GnuPG plugin

logger

Enable logger plugin

nss

Enable NSS plugin

pkcs11

Enable PKCS#11 plugin

sasl

Enable SASL plugin

softstore

Enable softstore plugin

app-crypt/rpm-sequoia

nettle

Use dev-libs/nettle as a crypto backend

openssl

Use dev-libs/openssl as a crypto backend

app-crypt/seahorse

ldap

Enable seahorse to manipulate GPG keys on a LDAP server.

app-crypt/swtpm

fuse

Support sys-fs/fuse based /dev/tpm interface

app-crypt/tpm2-pkcs11

fapi

Enable feature API backend

app-crypt/tpm2-tools

fapi

Enable feature API tools

app-crypt/tpm2-totp

plymouth

Add sys-boot/plymouth support

app-crypt/tpm2-tss

fapi

Enable feature API (requires openssl as crypto backend)

mbedtls

Use net-libs/mbedtls as crypto engine

openssl

Use dev-libs/openssl as crypto engine

policy

Enable policy library (requires openssl as crypto backend)

app-crypt/tpm-tools

pkcs11

Build Token data management utilities based on OpenCryptoki's (dev-libs/opencryptoki) PKCS#11 implementation.

app-crypt/zulucrypt

kwallet

Enable encrypted storage of passwords with kde-frameworks/kwallet

udev

Whether udev will be consulted when deciding if a volume is system or not

app-dicts/aspell-be

classic

Support classic spelling by default

app-dicts/gwaei

hunspell

Enable app-text/hunspell spellchecking and morphological analysis

mecab

Enable app-text/mecab support

app-dicts/myspell-pt

preao

Use the pre ortographic agreement version of the dictionary

app-doc/csound-manual

html

Install HTML documentation

app-doc/devmanual

offline

Use alternative minimal stylesheet instead of Tyrian theme

app-doc/kicad-doc

html

Generate documentation in HTML format

pdf

Generate documentation in PDF format

app-doc/linuxfromscratch

htmlsingle

Install all-on-one-page HTML version.

app-doc/pms

html

Generate and install PMS as .html as well

twoside

Enable two-sided layout suitable for printing

app-doc/pms-bin

html

Install PMS as .html as well

app-doc/tldp-howto

html

Install multi-chapter HTML docs

htmlsingle

Install all-on-one-page HTML docs

pdf

Install pdf docs

text

Install plain-text docs

app-editors/bluefish

gucharmap

Enable gucharmap dictionary plugin

spell

Enable spell checking capabilities via enchant library

app-editors/emacs

athena

Enable the MIT Athena widget set (x11-libs/libXaw)

dynamic-loading

Enable loading of dynamic libraries (modules) at runtime

games

Support shared score files for games

gfile

Use gfile (dev-libs/glib) for file notification

gmp

Use the GNU multiple precision arithmetic library (dev-libs/gmp) instead of the bundled mini-gmp subset

gsettings

Use gsettings (dev-libs/glib) to read the system font name

gzip-el

Compress bundled Emacs Lisp source

harfbuzz

Use media-libs/harfbuzz as text shaping engine

imagemagick

Use media-gfx/imagemagick for image processing

jit

Compile with Emacs Lisp native compiler support via libgccjit

json

Compile with native JSON support using dev-libs/jansson

libxml2

Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations

mailutils

Retrieve e-mail using net-mail/mailutils instead of the internal movemail substitute

source

Install C source files and make them available for find-function

threads

Add elisp threading support

toolkit-scroll-bars

Use the selected toolkit's scrollbars in preference to Emacs' own scrollbars

tree-sitter

Support the dev-libs/tree-sitter parsing library

wide-int

Prefer wide Emacs integers (typically 62-bit). This option has an effect only on 32-bit systems, where it increases the maximum buffer size from 0.5 to 2 GiB, at the cost of 10% to 30% Lisp slowdown.

app-editors/fe

sendmail

Send mail after editor abend

app-editors/featherpad

X

Link application against X11 libraries which adds support for virtual desktop awareness and tab DND

app-editors/gedit-plugins

charmap

Insert special characters just by clicking on them

git

Shows document changes related to git's HEAD

terminal

Embed a terminal in the bottom pane

app-editors/gnome-latex

latexmk

Install dev-tex/latexmk (used by default for the build tools)

rubber

Install dev-tex/rubber (can be used for the build tools)

app-editors/gvim

crypt

Use dev-libs/libsodium for crypto support

cscope

Enable cscope interface

netbeans

Include netbeans external editor integration support

racket

Enable support for Scheme using dev-scheme/racket

app-editors/helix

grammar

Build and install grammar language files

app-editors/jasspa-microemacs

nanoemacs

Build NanoEmacs instead of MicroEmacs

app-editors/joe

xterm

Enable full xterm clipboard support

app-editors/leafpad

emacs

Enable Emacs key theme

app-editors/mousepad

shortcuts

Build the "shortcuts" plugin

app-editors/nano

debug

Enable debug messages and assert warnings. Note that these will all be sent straight to stderr rather than some logging facility.

justify

Enable justify/unjustify functions for text formatting.

magic

Add magic file support (sys-apps/file) to automatically detect appropriate syntax highlighting

minimal

Disable all fancy features, including ones that otherwise have a dedicated USE flag (such as spelling).

app-editors/neovim

nvimpager

Install nvimpager symlink to less.sh macro

app-editors/okteta

designer

Build plugins for dev-qt/designer

app-editors/qhexedit2

gui

Install Qt5 hex editor

app-editors/tea

aspell

Enable spellchecking using app-text/aspell

app-editors/vim

crypt

Use dev-libs/libsodium for crypto support

cscope

Enable cscope interface

racket

Enable support for Scheme using dev-scheme/racket

terminal

Enable terminal emulation support

vim-pager

Install vimpager and vimmanpager links

X

Link console vim against X11 libraries to enable title and clipboard features in xterm

app-editors/vis

tre

more memory efficient regex search using dev-libs/tre

app-editors/vscode

egl

Use EGL platform, enables smooth rending in high refresh rate monitors on X11/Xwayland

wayland

Run in wayland mode under wayland sessions, xwayland otherwise. This flag doesn't affect x11 sessions.

app-editors/vscodium

egl

Use EGL platform, enables smooth rending in high refresh rate monitors on X11/Xwayland

wayland

Run in wayland mode under wayland sessions, xwayland otherwise. This flag doesn't affect x11 sessions.

app-editors/xemacs

athena

Chooses the MIT Athena widget set

bignum

Support for OpenSSL bignum implementation

dnd

Enables support for the x11-libs/dnd drag-n-drop library

pop

Support POP for mail retrieval

xim

Enable X11 XiM input method

app-editors/zed

gles

Use simplified OpenGLES instead of full-scale OpenGL

app-emacs/auctex

preview-latex

Use bundled preview-latex

app-emacs/bbdb

tex

Install plain TeX support files

vm

Add support for app-emacs/vm

wanderlust

Add support for app-emacs/wanderlust

app-emacs/calfw

howm

Add support for the app-emacs/howm note-taking tool

app-emacs/elscreen

wanderlust

Include support for app-emacs/wanderlust

app-emacs/emacs-common

games

Support shared score files for games

gsettings

Install schema file for gsettings (dev-libs/glib)

app-emacs/emacs-w3m

gzip-el

Compress bundled Emacs Lisp source

app-emacs/flim

oauth2

Support OAuth2 authentication (app-emacs/oauth2)

app-emacs/gap-mode

completion

Install GAP backend for app-emacs/company-mode to "complete anything."

lint

Support automatically linting GAP code via app-emacs/flycheck and dev-gap/gaplint.

app-emacs/mu-cite

bbdb

Include support for app-emacs/bbdb

app-emacs/org-mode

odt-schema

Install non-free schema files for OpenDocument Text exporter

app-emacs/remember

bbdb

Include support for app-emacs/bbdb

planner

Include support for app-emacs/planner

app-emacs/slime

xref

Install xref.lisp cross-referencing tool

app-emacs/sly

xref

Install xref.lisp cross-referencing tool

app-emacs/vm

bbdb

Include support for app-emacs/bbdb

app-emacs/wanderlust

bbdb

Include support for app-emacs/bbdb

app-emacs/wikipedia-mode

outline-magic

Enable support for outline-mode extensions (app-emacs/outline-magic)

app-emulation/86Box

experimental

Enable hardware from devbranch, which may be unstable or unusable.

fluidsynth

Enable MIDI support through media-sound/fluidsynth.

munt

Enable MIDI MT-32 support through media-libs/munt-mt32emu.

new-dynarec

Enable new dynamic recompiler from PCem 15, which should provide an even better emulation speed.

app-emulation/aranym

clipboard

Enable bidirectional clipboard transfer between the host and FreeMiNT

jit

Build Just-In-Time compiler variant with increased performance

lilo

Enable support for directly booting kernels such as Linux

osmesa

Allow images to be rendered in memory using the host CPU

pmmu

Build full PMMU variant, required for running mainline Linux

standard

Build standard (no JIT or PMMU) variant

app-emulation/bochs

3dnow

Enable support for emulating 3DNow! instructions (incomplete)

avx

Enable support for emulating Advanced Vector Extensions (AVX)

debugger

Enable debugger (slows down emulation)

gdb

Enable support for the remote GDB stub

x86-64

Enable support for emulation of 64-bit CPUs

app-emulation/crossover-bin

capi

Enable ISDN support via CAPI

osmesa

Add support for OpenGL in bitmaps using libOSMesa

pcap

Support packet capture software (e.g. wireshark)

app-emulation/dosemu

fluidsynth

use media-sound/fluidsynth for MIDI emulation

app-emulation/dxvk

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

d3d10

Enable support for DirectX 10 (d3d10.dll)

d3d11

Enable support for DirectX 11 (d3d11.dll)

d3d8

Enable support for DirectX 8 (d3d8.dll)

d3d9

Enable support for DirectX 9 (d3d9.dll)

dxgi

Enable support for the DirectX Graphics Infrastructure (dxgi.dll)

app-emulation/faudio

dumpvoices

FAudio dumps buffer data to individual files with RIFF/XWMA headers, usable with players like ffplay/testxwma.

app-emulation/fs-uae

fmv

Enable support for CD32 FMV (full motion video)

glew

Enable support for The OpenGL Extension Wrangler Library (media-libs/glew)

app-emulation/fs-uae-launcher

lha

Enable LHA archive support

app-emulation/fuse

backend-fbcon

Use framebuffer rendering backend

backend-gtk3

Use Gtk+ rendering backend

backend-sdl

Use SDL rendering backend

backend-svga

Use svgalib rendering backend

backend-X

Use X11 rendering backend

memlimit

Add compile-time memory usage limiting

app-emulation/fuse-utils

gcrypt

Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.

app-emulation/grub-xen-host

pvh

Build an additional grub bin for pvh.

app-emulation/hercules-sdl

object-rexx

Enable REXX support via Open Object Rexx (dev-lang/oorexx)

regina-rexx

Enable REXX support via Regina Rexx (dev-lang/regina-rexx)

app-emulation/libcacard

passthrough

Enable smartcard passthrough support via sys-apps/pcsc-lite

app-emulation/libguestfs

erlang

Build Erlang bindings

fuse

Enable image mount support via sys-fs/fuse

inspect-icons

Use media-gfx/icoutils for accessing/inspecting icon file within images

libvirt

Use app-emulation/libvirt to manipulate VMs

systemtap

Use dev-debug/systemtap to inspect VM via "probes"

app-emulation/libspectrum

gcrypt

Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.

app-emulation/libvirt

dtrace

Enable dtrace support via dev-debug/systemtap

firewalld

DBus interface to iptables/ebtables allowing for better runtime management of your firewall.

fuse

Allow LXC to use sys-fs/fuse for mountpoints

glusterfs

Enable GlusterFS support via sys-cluster/glusterfs

iscsi

Allow using an iSCSI remote storage server as pool for disk image storage

iscsi-direct

Allow using libiscsi for iSCSI storage pool backend

libssh

Use net-libs/libssh to communicate with remote libvirtd hosts, for example: qemu+libssh://server/system

libssh2

Use net-libs/libssh2 to communicate with remote libvirtd hosts, for example: qemu+libssh2://server/system

libvirtd

Builds the libvirtd daemon as well as the client utilities instead of just the client utilities

lvm

Allow using the Logical Volume Manager (sys-fs/lvm2) as pool for disk image storage

lxc

Support management of Linux Containers virtualisation (app-containers/lxc)

nbd

Allow using sys-block/nbdkit to access network disks

nfs

Allow using Network File System mounts as pool for disk image storage

numa

Use NUMA for memory segmenting via sys-process/numactl and sys-process/numad

openvz

Support management of OpenVZ virtualisation (openvz-sources)

parted

Allow using real disk partitions as pool for disk image storage, using sys-block/parted to create, resize and delete them.

pcap

Support auto learning IP addreses for routing

qemu

Support management of QEMU virtualisation (app-emulation/qemu)

rbd

Enable rados block device support via sys-cluster/ceph

virtiofsd

Drag in virtiofsd dependency app-emulation/virtiofsd

virt-network

Enable virtual networking (NAT) support for guests. Includes all the dependencies for NATed network mode. Effectively any network setup that relies on libvirt to setup and configure network interfaces on your host. This can include bridged and routed networks ONLY if you are allowing libvirt to create and manage the underlying devices for you. In some cases this requires enabling the 'netcf' USE flag (currently unavailable).

virtualbox

Support management of VirtualBox virtualisation (app-emulation/virtualbox)

wireshark-plugins

Build the net-analyzer/wireshark plugin for the Libvirt RPC protocol

xen

Support management of Xen virtualisation (app-emulation/xen)

zfs

Enable ZFS backend storage sys-fs/zfs

app-emulation/nemu

network-map

Adds possibility of exporting network map to SVG

ovf

Adds support for OVA/OVF import

remote-api

Adds API for remote control

app-emulation/open-vm-tools

deploypkg

Build deploypkg plugin

dnet

Enable support for nicinfo

doc

Generate API documentation

fuse

Enable vmblock-fuse/vmhgfs-fuse

gtkmm

Compile with Gtkmm and sigc++ (Recommended)

multimon

Enable multimon (Requires X)

resolutionkms

Build the linux/unix resolutionkms module

vgauth

Build vgauth

app-emulation/pcem

networking

Enable support for emulation of network cards.

app-emulation/punes

cg

Add support for Nvidia CG Toolkit

app-emulation/q4wine

ico

Enable ico support via media-gfx/icoutils

iso

Support unprivileged mounting of ISO9660 images via sys-fs/fuseiso

wineappdb

Enable Wine AppDB browser support

app-emulation/qemu

accessibility

Adds support for braille displays using brltty

aio

Enables support for Linux's Async IO

alsa

Enable alsa output for sound emulation

bpf

Enable eBPF support for RSS implementation.

capstone

Enable disassembly support with dev-libs/capstone

curl

Support ISOs / -cdrom directives via HTTP or HTTPS.

fdt

Enables firmware device tree support

fuse

Enables FUSE block device export

glusterfs

Enables GlusterFS cluster fileystem via sys-cluster/glusterfs

gnutls

Enable TLS support for the VNC console server. For 1.4 and newer this also enables WebSocket support. For 2.0 through 2.3 also enables disk quorum support.

io-uring

Enable efficient I/O via sys-libs/liburing.

iscsi

Enable direct iSCSI support via net-libs/libiscsi instead of indirectly via the Linux block layer that sys-block/open-iscsi does.

jpeg

Enable jpeg image support for the VNC console server

keyutils

Support Linux keyrings via sys-apps/keyutils

multipath

Enable multipath persistent reservation passthrough via sys-fs/multipath-tools.

ncurses

Enable the ncurses-based console

nfs

Enable NFS support

numa

Enable NUMA support

pin-upstream-blobs

Pin the versions of BIOS firmware to the version included in the upstream release. This is needed to sanely support migration/suspend/resume/snapshotting/etc... of instances. When the blobs are different, random corruption/bugs/crashes/etc... may be observed.

pipewire

Enable pipewire output for sound emulation

plugins

Enable qemu plugin API via shared library loading.

png

Enable png image support for the VNC console server

pulseaudio

Enable pulseaudio output for sound emulation

rbd

Enable rados block device backend support, see https://docs.ceph.com/en/mimic/rbd/qemu-rbd/

sdl

Enable the SDL-based console

sdl-image

SDL Image support for icons

slirp

Enable TCP/IP in hypervisor via net-libs/libslirp

spice

Enable Spice protocol support via app-emulation/spice

ssh

Enable SSH based block device support via net-libs/libssh2

static

Build the User and Software MMU (system) targets as well as tools as static binaries

static-user

Build the User targets as static binaries

systemtap

Enable SystemTap/DTrace tracing

usb

Enable USB passthrough via dev-libs/libusb

usbredir

Use sys-apps/usbredir to redirect USB devices to another machine over TCP

vde

Enable VDE-based networking

vhost-net

Enable accelerated networking using vhost-net, see https://www.linux-kvm.org/page/VhostNet

virgl

Enable experimental Virgil 3d (virtual software GPU)

virtfs

Enable VirtFS via virtio-9p-pci / fsdev. See https://wiki.qemu.org/Documentation/9psetup

vte

Enable terminal support (x11-libs/vte) in the GTK+ interface

xattr

Add support for getting and setting POSIX extended attributes, through sys-apps/attr. Requisite for the virtfs backend.

xdp

Enable support for XDP through net-libs/xdp-tools

xen

Enables support for Xen backends

app-emulation/ski

debug

enable extra binary emulation debugging via sys-libs/binutils-libs

app-emulation/spice

smartcard

Enable smartcard remoting using app-emulation/libcacard

app-emulation/uade

fuse

Enable sys-fs/fuse uadefs frontend for on-the-fly WAV conversion

app-emulation/vice

ethernet

Enable ethernet emulation

headless

Include the headless variant of the emulator

mpg123

Enable mp3@64 cartridge support

parport

Enable parallel port SID support

pci

Enable PCI device discovery using sys-apps/pciutils

app-emulation/virt-manager

policykit

Enables sys-auth/polkit authentication support, required when using app-emulation/libvirt with PolicyKit authentication

sasl

Depend on the proper libraries needed to connect to SASL-enabled libvirtd instances (e.g. Kerberos-protected instances).

app-emulation/virtualbox

dtrace

Install dtrace Extension Pack.

headless

Build without any graphic frontend.

lvm

Build VBoxVolInfo that needs devicemapper from sys-fs/lvm2.

pax-kernel

Apply patch needed for pax enabled kernels.

sdk

Enable building of SDK.

udev

Controls installation of special USB udev rules.

vboxwebsrv

Build and install the VirtualBox webservice.

vde

Support for VDE networking via net-misc/vde.

vmmraw

Enable 32-bit support on a 64-bit kernel.

app-emulation/virtualbox-kvm

dtrace

Install dtrace Extension Pack

hardened

Enable hardening and install binaries SUID

lvm

Build VBoxVolInfo that needs devicemapper from sys-fs/lvm2.

sdk

Enable building of SDK

udev

Controls installation of special USB udev rules.

vboxwebsrv

Build and install the VirtualBox webservice

vde

Support for VDE networking via net-misc/vde

vmmraw

Enable 32-bit support on a 64-bit kernel.

app-emulation/virt-viewer

libvirt

Support connecting to virtual machines managed by libvirt.

spice

Support connecting to SPICE-enabled virtual machines.

vnc

Support connecting to VNC-enabled virtual machines.

vte

Enable terminal support (x11-libs/vte) in the GTK+ interface

app-emulation/virt-what

dmi

Use sys-apps/dmidecode to read firmware data

app-emulation/vkd3d

spirv-tools

Enable SPIRV shader debugging support using dev-util/spirv-tools

app-emulation/vkd3d-proton

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

extras

Install extra tools and demos in /usr/lib/vkd3d-proton

app-emulation/wine-gecko

shared

Install pre-unpacked files which do not need to be copied into the Wine prefix

app-emulation/wine-mono

shared

Install pre-unpacked files which do not need to be copied into the Wine prefix (note that this requires the default top-level Z: drive to be kept for out-of-prefix files to be readable)

app-emulation/wine-proton

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

gecko

Enable mshtml support using app-emulation/wine-gecko

mono

Enable .NET support using app-emulation/wine-mono

osmesa

Enable off-screen rendering (OpenGL in bitmaps) support

perl

Install helpers that require perl (winedump/winemaker)

sdl

Enable gamepad support using media-libs/libsdl2

vkd3d

Enable DirectX 12 support using app-emulation/vkd3d

wow64

Enable running 32bit applications without 32bit ELF multilib by mapping to 64bit calls (experimental, *may* have worse/unusable OpenGL performance or other issues compared to USE=abi_x86_32, also lacks 16bit support) -- still need dev-util/mingw64-toolchain with abi_x86_32 which itself does not need multilib

app-emulation/wine-staging

capi

Enable ISDN support using net-libs/libcapi

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

dos

Pull in games-emulation/dosbox to run DOS applications

gecko

Enable mshtml support using app-emulation/wine-gecko

mingw

Build PE files using a MinGW toolchain for better compatibility

mono

Enable .NET support using app-emulation/wine-mono

netapi

Enable support for configuring remote shares using net-fs/samba

osmesa

Enable off-screen rendering (OpenGL in bitmaps) support

pcap

Support packet capture software (e.g. wireshark)

perl

Install helpers that require perl (winedump/winemaker)

samba

Pull in net-fs/samba with winbind for NTLM auth support

sdl

Enable gamepad support using media-libs/libsdl2

wow64

app-emulation/winetricks

rar

Pull in app-arch/unrar for extraction of rar-compressed game files

app-emulation/wine-vanilla

capi

Enable ISDN support using net-libs/libcapi

crossdev-mingw

Use sys-devel/crossdev for the toolchain rather than dev-util/mingw64-toolchain (requires manual setting up)

dos

Pull in games-emulation/dosbox to run DOS applications

gecko

Enable mshtml support using app-emulation/wine-gecko

mingw

Build PE files using a MinGW toolchain for better compatibility

mono

Enable .NET support using app-emulation/wine-mono

netapi

Enable support for configuring remote shares using net-fs/samba

osmesa

Enable off-screen rendering (OpenGL in bitmaps) support

pcap

Support packet capture software (e.g. wireshark)

perl

Install helpers that require perl (winedump/winemaker)

samba

Pull in net-fs/samba with winbind for NTLM auth support

sdl

Enable gamepad support using media-libs/libsdl2

vkd3d

Enable DirectX 12 support using app-emulation/vkd3d

wow64

app-emulation/x48

readline

Enables support for libreadline

app-emulation/xe-guest-utilities

xenstore

Use xenstore binaries bundled by Citrix instead of building app-emulation/xen-tools

app-emulation/xen

boot-symlinks

Symlink xen.gz variants in /boot, disable on fat filesystems

flask

Enable the Flask XSM module from NSA

uefi

Adds UEFI boot support, requires LDFLAG -melf_x86_64 for amd64

app-emulation/xen-tools

api

Build the C libxenapi bindings

hvm

Enable support for hardware based virtualization (VT-x,AMD-v)

ipxe

Enable ipxe support

ovmf

Enable support to boot UEFI guest vm, needed by hvm

pygrub

Install the pygrub boot loader

qemu

Enable IOEMU support via the use of qemu-dm

qemu-traditional

Build the old qemu traditional device model (useful only if you cannot change to the new device model e.g. Windows VMs)

rombios

Enable rombios support, needed by ipxe

screen

Enable support for running domain U console in an app-misc/screen session

system-ipxe

Using sys-firmware/ipxe instead of the bundled one

system-qemu

Using app-emulation/qemu instead of the bundled one

system-seabios

Using sys-firmware/seabios instead of the bundled one

app-emulation/xtrs

ls-dos

Install LS-DOS disk images for Model 4P

app-eselect/eselect-php

fpm

Enable the FastCGI Process Manager SAPI

app-eselect/eselect-repository

mercurial

Support mercurial sync-type.

app-eselect/eselect-wine

xdg

Set XDG_DATA_DIRS to use the selected wine.desktop, allows e.g. 'xdg-open my.exe' for file managers

app-forensics/afflib

fuse

Enable extra fuse thingies

qemu

Enable qemu stuff

s3

Enable support for Amazon S3

app-forensics/aide

curl

Use curl for http,https and ftp backends

e2fs

Enable support for checking file attributes on ext2/ext3/ext4 filesystems

app-forensics/chkrootkit

cron

Install cron script for weekly rootkit scans

app-forensics/honggfuzz

clang

Enable clang support (pull sys-libs/blocksruntime dependency).

app-forensics/lynis

cron

Install /etc/cron.* files

app-forensics/sleuthkit

aff

Enable extra aff formats

ewf

Enable libewf support

app-forensics/volatility3

crypt

support plugins that decrypt passwords, password hashes, etc.

disasm

support plugins that perform malware analysis and disassemble code

jsonschema

improve error messages regarding improperly configured ISF files

leechcore

support memory acquisition via leechcore

snappy

support AVMLs native compression format

yara

support YARA pattern matching engine

app-forensics/yara

cuckoo

Enable cockoo module

dex

Enable dex module

dotnet

Enable dotnet module

macho

Enable macho module

magic

Enable magic module

profiling

Enable rules profiling

python

Pulls in python binding via dev-python/yara-python

app-i18n/fcitx

autostart

Enable XDG-compatible autostart of Fcitx

emoji

Enable emoji loading for CLDR

enchant

Enable Enchant backend (using app-text/enchant) for spelling hinting

keyboard

Enable key event translation with XKB and build keyboard engine

presage

Enable presage for word predication (not stable)

server

Build a fcitx as server, disable this option if you want to use fcitx as an embedded library

app-i18n/fcitx-chinese-addons

cloudpinyin

Build cloud pinyin addon

data

Build data

gui

Enable GUI support (qt5 or qt6)

opencc

Enable support for conversion between Traditional and Simplified Chinese

qt5

Enable configure qt5

webengine

Enable built-in browser using dev-qt/qtwebengine

app-i18n/fcitx-configtool

config-qt

Enable fcitx5-config-qt

kcm

Enable KDE KCM support

test

Enable Test

app-i18n/fcitx-gtk

gtk2

Install input method module for GTK+ 2

gtk3

Enable support for GTK+3

gtk4

Enable support for GTK 4

onlyplugin

Build only plugin

snooper

Enable key snooper for gtk app

app-i18n/fcitx-lua

dlopen

Use dlopen to load lua library

app-i18n/fcitx-qt

onlyplugin

Build only plugin

qt6

Build support for QT6

staticplugin

Build plugin as static

app-i18n/ibus

emoji

Enable support for Emoji

gtk2

Enable the GTK-2 input method module

gtk3

Enable the GTK-3 input method module

gtk4

Enable the GTK-4 input method module

unicode

Enable support for Unicode choice

app-i18n/ibus-handwrite

zinnia

Enable support for app-i18n/zinnia

app-i18n/ibus-libpinyin

boost

Compile against dev-libs/boost libraries

opencc

Enable support for app-i18n/opencc

app-i18n/ibus-pinyin

boost

Enable support for dev-libs/boost

app-i18n/im-chooser

xfce

Enable support for XFCE panel

app-i18n/imsettings

xfconf

Enable support for xfce-base/xfconf

app-i18n/libime

data

Build data

app-i18n/librime

debug

Enable debugging (including logging of input of RIME input methods)

app-i18n/mozc

fcitx4

Enable support for app-i18n/fcitx 4

fcitx5

Enable support for app-i18n/fcitx 5

gui

Install graphical user interface tool (mozc_tool)

ibus

Enable support for app-i18n/ibus

renderer

Enable native candidate window

app-i18n/pyzy

boost

Enable support for dev-libs/boost

doc

Generate API documentation

opencc

Enable support for app-i18n/opencc

app-i18n/rime-data

extra

Install extra packages

app-i18n/scim

gtk3

Enable support for x11-libs/gtk+:3

app-i18n/scim-anthy

gtk3

Enable support for x11-libs/gtk+:3

kasumi

Use Anthy dictionary maintenance tool (app-dicts/kasumi)

app-i18n/tomoe

hyperestraier

Enable support for app-text/hyperestraier

app-i18n/uim

anthy

Enable support for app-i18n/anthy

eb

Enable support for dev-libs/eb

gtk2

Enable support for x11-libs/gtk+:2

skk

Enable support for app-i18n/skk-jisyo

app-laptop/hdapsd

libconfig

Require dev-libs/libconfig to allow the daemon to read a configuration file at startup

app-laptop/ibam

gkrellm

Enable building of app-admin/gkrellm module

app-laptop/laptop-mode-tools

apm

Add APM (Advanced Power Management) support

app-laptop/pbbuttonsd

ibam

Enable support for Intelligent Battery Monitoring

macbook

Enable support for the Macbook and Macbook Pro

app-laptop/thinkfan

atasmart

include libatasmart support to get disc temperature

nvidia

allow thinkfan to read GPU temperature from the proprietary nVidia driver

yaml

use YAML format for config file

app-laptop/tp_smapi

hdaps

Install a compatible HDAPS module

app-metrics/collectd

contrib

Install user-contributed files in the doc directory

filecaps

When set collectd daemon will have set required capabilities to run most plugins even if run as unprivileged user

java

Must be set (workaround for java-pkg-opt-2 eclass limitation) when you want java or genericjmx plugin

udev

Enable optional udev usage in disk plugin; Required for smart plugin

xfs

Enable optional capability to filter on XFS file system in df plugin; Requires XFS headers from sys-fs/xfsprogs

app-metrics/node_exporter

systemd

Enables systemd collector by default

app-metrics/prometheus-podman-exporter

btrfs

Collect metrics for btrfs filesystem

app-misc/anki

gui

Enable support for a graphical user interface. Disable for standalone sync server.

app-misc/blink1

mini-tool

Build and install command-line mini-tool blink1-mini-tool (normally used for embedded devices)

server

Build and install REST API server (currently hard-coded to TCP port 8080)

tool

Build and install command-line tool blink1-tool

app-misc/broot

X

X11 clipboard interaction

app-misc/byobu

screen

Use app-misc/screen as the default backend

app-misc/ca-certificates

cacert

Include root/class3 certs from CAcert (https://www.cacert.org/)

app-misc/carbon-c-relay

client

build and install sendmetric client utility

lz4

add support for LZ4 compressed transport

oniguruma

use dev-libs/oniguruma as regex implementation

pcre2

use dev-libs/libpcre2 as regex implementation

snappy

add support for Snappy compressed transport

app-misc/ddccontrol

pci

enable direct PCI memory access (the setuid ddcpci util)

app-misc/ddcutil

drm

Use x11-libs/libdrm for more verbose diagnostics.

usb-monitor

Adds support for monitors attached via USB.

user-permissions

Adds a udev rules to allow non-root users in the i2c group to access the /dev/i2c-* devices. If usb-monitor is selected, users will need to be added to the video group to access the USB monitor. Otherwise, only root will be able to use ddcutil.

app-misc/digitemp

ds2490

Build support for the ds2490 sensor

ds9097

Build support for the ds9097 sensor

ds9097u

Build support for the ds9097u sensor

app-misc/ebusd

contrib

Compile and install additional user contribued plugins.

knx

Enable support for connecting to KNX.

mqtt

Enable support for connecting to MQTT.

app-misc/fastfetch

chafa

Enables text/graphics renderer with media-gfx/chafa

ddcutil

Use app-misc/ddcutil to query monitor settings

drm

Enables support for X.org's x11-libs/libdrm

elf

Use libelf to extract strings from binaries

osmesa

Enables offscreen rendering support from media-libs/mesa

vulkan

Enables reading GPU via media-libs/vulkan-loader

xfce

Enables support for XFCE config

xrandr

Enables support for Xrandr

app-misc/FreeSSM

small-resolution

Build the app for small resolution screeens

app-misc/g810-led

hidapi

Use dev-libs/hidapi instead of virtual/libusb for talking to the device (advertised to be faster)

app-misc/geoclue

modemmanager

Enable geolocation through 3G or GPS enabled hardware through net-misc/modemmanager.

zeroconf

Enable retrieval of GPS location from Android devices with https://wiki.gnome.org/Apps/GeoclueShare

app-misc/gramps

geo

Enable rendering of geographical data using sci-geosciences/osm-gps-map

rcs

Adds support for family tree archives via dev-vcs/rcs

reports

All external software that is needed for graphical reports will be installed

app-misc/graphlcd-base

fontconfig

Add support for media-libs/fontconfig font names.

freetype

Add support for media-libs/freetype.

graphicsmagick

Add support for media-gfx/graphicsmagick.

imagemagick

Add support for media-gfx/imagemagick.

app-misc/irtrans-irserver

mono

Enable mono support

app-misc/jdupes

dedupe

Enable deduplication support

app-misc/jp

jpp

Install jpp which is an extended superset of the jp CLI for JMESPath

app-misc/jpipe

jpp-symlink

Install a jpp symlink that points to jpipe.

jp-symlink

Install a jp symlink that points to jpipe.

app-misc/jq

oniguruma

Use dev-libs/oniguruma for regular expression support

app-misc/kryoflux-dtc

demos

Install example floppy game files.

fast-firmware

Install fast firmware instead of slow firmware.

app-misc/lcd4linux

apm

Enable the APM plugin.

asterisk

Enable the Asterisk plugin.

button-exec

Enable the Button plugin, to execute something on keypress.

cpuinfo

Enable the cpuinfo plugin.

dbus

Enable the dbus plugin.

diskstats

Enable the diskstats plugin.

dvb

Enable support for the DVB plugin.

event

Enable the event plugin.

exec

Enable the exec plugin, to read output from external programs.

fifo

Enable the FIFO (First-In, First-Out) plugin.

file

Enable the file plugin, to read from input from files.

gps

Enable the gps plugin, for reading gps coordinates.

hddtemp

Enable the hddtemp plugin, to read from the hddtemp daemon.

huawei

Enable the huawei plugin, to read from a huawei device.

i2c-sensors

Enable the i2c_sensors plugin, to read sensor data.

iconv

Enable the iconv plugin, to convert between encodings.

isdn

Enable the isdn plugin, to get information about ISDN.

kvv

Enable the kvv plugin, to get realtime train schedule from the Karlsruher Verkehrsverbund.

loadavg

Enable the loadavg plugin, to get stats load

meminfo

Enable the meminfo plugin, to get memory statistics.

mpd

Enable the mpd plugin, to read from the Music Player Daemon.

mpris-dbus

Enable the mpris plugin, to read data via dbus for mpris.

mysql

Enable the mysql plugin, to get mysql database information.

netdev

Enable the netdev plugin, to get interface statistics.

netinfo

Enable the netinfo plugin, to get more interface statistic.

outb

Enable raw i/o access.

pop3

Enable the pop3 plugin, to get notified about new mails.

proc-stat

Enable the proc_stat plugin, to read data from the proc file system.

python

Enable support for dev-lang/python and enable the python plugin, to execute own python scripts.

qnaplog

Enable the qnaplog plugin, to read a log from a QNAP device.

raspi

Enable the raspi plugin, to read sensor data from a Raspberry Pi.

sample

Enable the sample plugin.

statfs

Enable the statfs plugin, to get statistics about the file system.

uname

Enable the uname plugin, to get the output of uname.

uptime

Enable the uptime plugin.

w1retap

Enable the w1retap plugin.

wireless

Enable the wireless plugin, to get wireless statistics.

app-misc/lcdproc

ethlcd

Enable support for ethlcd in the hd44780 driver.

extra-charmaps

Enable extra language specific charmaps.

nfs

Display NFS filesystem stats in the lcdproc client.

png

Enable support for media-libs/libpng in the glcd driver.

samba

Display SMBFS filesystem stats in the lcdproc client.

test-menu

Enable test menu support for the lcdproc server.

truetype

Enable support for media-libs/freetype in the glcd driver.

app-misc/libdatovka

openssl

Use openssl backend

app-misc/lirc

audio

Support using an audio device connected to an IR receiver

devinput

Support the devinput input device

ftdi

Support FTDI devices

gtk

Include GTK support which enables the use of lirc-setup

inputlirc

Add a dependency on app-misc/inputlircd

uinput

Enable support for uinput

app-misc/mc

edit

Compile and install the mcedit application

sftp

Add support for sftp (uses net-libs/libssh2 for it).

slang

Use sys-libs/slang instead of sys-libs/ncurses.

app-misc/mime-types

nginx

Enable mime-types support for www-servers/nginx package

app-misc/mosquitto

bridge

Enable bridge support in the MQTT broker.

persistence

Store messages and subscriptions to a file.

srv

Include SRV lookup support.

websockets

Support the WebSocket protocol.

app-misc/muttprint

doc

Builds documentation

app-misc/neofetch

X

Enable support for detecting DEs, WMs, screen resolutions, and showing images from an X terminal

app-misc/nnn

8contexts

Enable 8 contexts (instead of 4)

colemak

Key bindings for Colemak keyboard layout

emoji

Display icons using emoji

gitstatus

Add git status column to the detail view

icons

Display icons using icons-in-terminal

namefirst

Print filenames first in the detail view

nerdfonts

Display icons using nerdfonts icons

qsort

Use Alexey Tourbin's quick sort implementation

restorepreview

Add pipe to close and restore preview-tui for internal undetached edits

app-misc/note

general

Add support for ascii flatfile backend

text

Add support for text backend

app-misc/ola

ftdi

Support FTDI devices

http

Enable built-in Web UI

rdm-tests

Install RDM responder tests

app-misc/pax-utils

python

Install a more powerful/faster version of lddtree

app-misc/recoll

camelcase

Enable indexing for camelCase sentences and words

chm

Enable CHM file support via dev-python/pychm

inotify

Use the Linux Kernel notification subsystem for monitoring file alterations in realtime

session

Stop monitoring file alterations when X11 session terminates

webengine

Use dev-qt/qtwebengine for fancy result list display

app-misc/rlwrap

debug

Enable debug

app-misc/screen

multiuser

Enable multiuser support (by setting correct permissions)

nethack

Express error messages in nethack style

app-misc/sphinx

id64

use 64-bit document and word IDs

mariadb

Add mariadb database support

stemmer

Enable language stemming support

app-misc/task

sync

Enable "task sync" support

app-misc/tmux

sixel

Enable sixel support

utempter

Include libutempter support

app-misc/tracker

miners

Install the app-misc/tracker-miners package for actual data mining support for tracker

stemmer

Add word stemming via dev-libs/snowball-stemmer.

app-misc/tracker-miners

cue

Enable cue sheet parsing

gsf

Enable gnome-extra/libgsf based data extractor and for ODT.

iptc

Enable extraction of IPTC data from pictures

iso

Enable extraction of metadata from ISO disk images

playlist

Add support for playlists

xps

Add support for XPS file format through app-text/libgxps.

app-misc/unfoo

minimal

Do not install all support archive binaries

app-misc/vcontrold

vclient

Build the vclient helper program to talk to vcontrold

vsim

Build the vsim helper program (simulates the heating's answers, for development and debugging)

app-misc/vifm

extended-keys

Support for extended keys (arrows, home etc)

gtk

Use gtk+ to determine mimetypes

vim

Install the vifm vim plugin and vim-compatible documentation

app-misc/worker

avfs

Enable support for sys-fs/avfs

app-misc/yq

yq-symlink

Create a yq symlink to yq-python.

app-misc/yq-go

yq-symlink

Create a yq symlink to yq-go.

app-mobilephone/gammu

curl

Enables curl support

irda

Enables infrared support

mysql

Use mysql for data storage

nls

Enable native language support

odbc

Use ODBC as DB connector

postgres

Use PostgreSQL for data storage

usb

Enable USB suport

app-mobilephone/gnokii

ical

Enable support for dev-libs/libical

irda

Enable infrared support

pcsc-lite

Enable smartcard support with sys-apps/pcsc-lite

sms

Enable SMS support (build smsd)

app-mobilephone/smstools

stats

Enable statistic reporting

app-office/abiword

collab

Enable collaborative editing plugin

goffice

Enable goffice plugin

grammar

Enable grammar checking via dev-libs/link-grammar

map

Enable world map support through media-libs/libchamplain

math

Enable support for x11-libs/gtkmathview

ots

Enable Text Summarizer plugin

plugins

Enable plugins build (see http://www.abisource.com/wiki/PluginMatrix for more information). If your file cannot be opened due lack of support, try enabling this.

redland

Enables support redland and raptor libs.

thesaurus

Enable thesaurus support

wordperfect

Enable wordperfect file support via app-text/libwpd

app-office/calcurse

caldav

Support CalDAV

app-office/calligra

charts

Build chartshape plugin for creating business charts with dev-libs/kdiagram

import-filter

Enable support for various import filter file formats like WordPerfect, Visio and Apple Keynote

lcms

Build colorengine plugins using media-libs/lcms

okular

Enable bindings for kde-apps/okular

phonon

Build stage/eventplugins and videoshape plugin using media-libs/phonon

webengine

Enable Braindump support using dev-qt/qtwebengine

app-office/calligraplan

activities

Enable kactivities support

holidays

Enable kde-frameworks/kholidays integration

kwallet

Enable access to encrypted OpenDocument files with kde-frameworks/kwallet storage

app-office/glabels

barcode

Enable barcode support through external libraries.

app-office/gnucash

aqbanking

Connect to some internet banks via AqBanking

quotes

Enable online stock quote retrieval

app-office/gnumeric

libgda

Enable database support through gnome-extra/libgda.

perl

Enable perl plugin loader.

app-office/grisbi

goffice

enable goffice graphic support

app-office/kmymoney

activities

Enable kde-plasma/plasma-activities integration

addressbook

Enable kde-apps/akonadi contact integration

hbci

Enable HBCI support using net-libs/aqbanking

holidays

Enable kde-frameworks/kholidays integration

app-office/kraft

pim

Enable support for KDE PIM resources integration

app-office/libalkimia

webengine

Enable online quotes using dev-qt/qtwebengine

app-office/libreoffice

base

Enable full support for LibreOffice Base databases (involves additional bundled libs)

clang

Use Clang compiler instead of GCC

coinmp

Use sci-libs/coinor-mp as alternative solver

googledrive

Enable support for remote files on Google Drive

mariadb

Prefer mariadb connector over mysql connector

odk

Build the Office Development Kit

pdfimport

Enable PDF import via the Poppler library

vulkan

Enable Vulkan usage via the skia library (clang recommended)

app-office/libreoffice-l10n

offlinehelp

Install help files locally instead of using the LibreOffice Wiki

app-office/lyx

aspell

Add support for aspell spellchecking

dia

Add support for diagrams (app-office/dia)

dot

Add support for DOT import (media-gfx/graphviz)

enchant

Add support for enchant spellchecking wrapper (both aspell and hunspell can be used by LyX).

gnumeric

Add support for importing Gnumeric/OpenOffice/MS Excel spreadsheets into LyX.

html

Add support for HTML import

hunspell

Add support for spellchecking based on hunspell and reuse system-wide OpenOffice dictionaries. This also enable thesaurus dictionaries not accessible via aspell.

monolithic-build

This should speed up compilation significantly when you have enough RAM (> 600 MB)

rcs

Add support for revision control via dev-vcs/rcs

rtf

Add support for RTF import/export packages

app-office/magicpoint

contrib

Install additional contributed scripts

app-office/mdbtools

glib

Use functions provided by dev-libs/glib, not built-in

app-office/planner

libgda

PostgreSQL support via gnome-extra/libgda

app-office/sc-im

ods

Add ods import support

plots

Add sci-visualization/gnuplot for plotting support

tmux

Use app-misc/tmux for clipboard copy/paste

wayland

Use gui-apps/wl-clipboard for clipboard copy/paste

X

Use x11-misc/xclip for clipboard copy/paste

xls

Add xls support

xlsx

Add xlsx support

app-office/scribus

boost

Enable support for Boost based enhancement

hunspell

Enable support for spell checking with app-text/hunspell

minimal

Don't install headers (only required for e.g. plug-in developers)

osg

3D rendering via dev-games/openscenegraph

scripts

Install the scripts

templates

Document templates

tk

Install tk based scripts e.g. FontSample.py

app-office/skrooge

activities

Enable kactivities support

app-office/texmacs

netpbm

Add support for media-libs/netpbm

app-office/texstudio

video

Enable video player in pdf files

app-pda/gtkpod

clutter

Enable clutter support for displaying coverart

app-portage/conf-update

colordiff

Use colors when displaying diffs (app-misc/colordiff)

app-portage/eix

debug

Build with upstream's CXXFLAGS/LDFLAGS for debugging support; not recommended for normal use.

doc

Create description of the eix cache file additionally in html format

sqlite

Compile in support for portage's sqlite backend; to actually use it you need additional configuration of portage and eix

app-portage/gemato

gpg

Install dependencies needed for OpenPGP signature verification support

pretty-log

Pull dev-python/rich to enable pretty logs

tools

Install additional utilities (benchmarks, hash testing tools, fast Manifest generators) to /usr/share/gemato.

app-portage/grs

server

Install all the tools building systems

app-portage/hackport

profile

Enable profiling flags

app-portage/kuroneko

scraper

Include the dependencies necessary for Bugzilla scraping.

app-portage/nattka

depgraph-order

Process packages in depgraph order whenever possible.

app-portage/pfl

network-cron

Adds a cron job which does a weekly submit of the package database

app-portage/portage-utils

qmanifest

Build qmanifest applet, this adds additional dependencies for GPG, OpenSSL and BLAKE2B hashing

qtegrity

Build qtegrity applet, this adds additional dependencies for OpenSSL

app-portage/tatt

templates

Install template scripts to be used with tatt

app-shells/atuin

client

Enable the autin client

daemon

Enable the autin background daemon on the client

server

Enable the autin server

sync

Enable the server-sync feature in the autin client

app-shells/autojump

ipython

Add support for dev-python/ipython

app-shells/bash

bashlogger

Log ALL commands typed into bash; should ONLY be used in restricted environments such as honeypots

mem-scramble

Build with custom malloc/free overwriting allocated/freed memory

net

Enable /dev/tcp/host/port redirection

pgo

Optimize the build using Profile Guided Optimization (PGO)

plugins

Add support for loading builtins at runtime via 'enable'

app-shells/bash-completion

eselect

Support blacklisting of completions via 'eselect bashcomp'. This enables custom Gentoo patching of upstream completion loader.

app-shells/mksh

lksh

variant that uses POSIX-compliant arithmetics with the host “long” data type and is automatically in POSIX mode when called as /bin/sh

app-shells/nushell

plugins

Build official plugins

system-clipboard

System clipboard support in `reedline`

app-shells/pdsh

rsh

This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred.

app-shells/shish

diet

Use dev-libs/dietlibc

app-text/atril

caja

Enable property page extension in mate-base/caja

dvi

Enable build-in DVI viewer

epub

Enable build-in DVI viewer using net-libs/webkit-gtk

synctex

Enable search highlighting through synctex (virtual/tex-base)

t1lib

Enable the Type-1 fonts for the build-in DVI viewer (media-libs/t1lib)

xps

Enable XPS viewer using app-text/libgxps

app-text/blogc

git

Build blogc-git-receiver tool

httpd

Build blogc-runserver tool

make

Build blogc-make tool

app-text/calibre

font-subsetting

Enable font subsetting support

system-mathjax

Use a system copy of mathjax

unrar

Enable support for comic books compressed with the non-free Rar format

app-text/cmigemo

vim

Install Vim plugin for C/Migemo

app-text/crengine-ng

chm

Support chm format

fribidi

Support bidirectional text by dev-libs/fribidi

harfbuzz

Use media-libs/harfbuzz for kerning and ligatures

libunibreak

Use dev-libs/libunibreak for hyphenation

libutf8proc

Use dev-libs/libutf8proc for manipulating unicode strings

app-text/crm114

mew

Add support for using the mewdecode mime decoder (app-emacs/mew)

normalizemime

Add support for using the normalizemime (mail-filter/normalizemime)

app-text/crqt-ng

chm

Support chm format

fribidi

Support bidirectional text by dev-libs/fribidi

harfbuzz

Use media-libs/harfbuzz for kerning and ligatures

libunibreak

Use dev-libs/libunibreak for hyphenation

libutf8proc

Use dev-libs/libutf8proc for manipulating unicode strings

app-text/crwx-ng

chm

Support chm format

fribidi

Support bidirectional text by dev-libs/fribidi

harfbuzz

Use media-libs/harfbuzz for kerning and ligatures

libunibreak

Use dev-libs/libunibreak for hyphenation

libutf8proc

Use dev-libs/libutf8proc for manipulating unicode strings

app-text/dblatex

inkscape

Use inkscape to convert SVG. Disable to use gnome-base/librsvg instead.

app-text/dictd

judy

Build Judy-based (dev-libs/judy) plugin implementing fast "exact" and especially "lev" strategies

minimal

Don't build server but dict client, dictzip and dictfmt only.

app-text/docbook-sgml-utils

jadetex

Add support for processing tex files produced by the TeX backend of Jade

app-text/docbook-xsl-ns-stylesheets

ruby

Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby.

app-text/docbook-xsl-stylesheets

ruby

Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-eselect/eselect-ruby.

app-text/doxygen

clang

support for llvm-core/clang assisted parsing

dot

allow to create dot graphs using media-gfx/graphviz

doxysearch

build doxyindexer and doxysearch.cgi

app-text/ebook-tools

lit2epub

Install lit2epub script

app-text/editorconfig-core-c

cli

Install command line interface.

app-text/enchant

aspell

Adds support for app-text/aspell spell checker

hunspell

Adds support for app-text/hunspell spell checker

nuspell

Adds support for app-text/nuspell spell checker

voikko

Adds support for dev-libs/libvoikko spell checker

app-text/evince

dvi

Enable the built-in DVI viewer

nautilus

Enable property page extension in gnome-base/nautilus

postscript

Enable support for PostScript and Adobe Illustrator documents with app-text/libspectre

spell

Enable inline spell check for annotations via app-text/gspell

xps

Enable XPS viewer using app-text/libgxps

app-text/feathernotes

X

Link application against X11 libraries which adds support for virtual desktop awareness and tab DND

app-text/ghostscript-gpl

unicode

Add support for unicode passwords via net-dns/libidn

app-text/groonga

abort

Enable query abortion

benchmark

Build benchmark programs

dynamic-malloc-change

Allow dynamic memory allocation change for testing

exact-alloc-count

Atomic counting for memory alloc count

fmalloc

Make memory allocation failed in specified condition for debug

futex

Use futex

libevent

Enable dev-libs/libevent used for suggestion

mecab

Use app-text/mecab for morphological analysis

msgpack

Enable dev-libs/msgpack used for suggestion

nfkc

Use nfkc based utf8 normalization

sphinx

Enable document generation by app-misc/sphinx

uyield

Build for detecting race conditions

zeromq

Enable net-libs/zeromq used for suggestion

app-text/htmltidy

deprecated

Install tools and header files which are now considered deprecated

app-text/hyperestraier

mecab

Enable app-text/mecab support for Estraier

app-text/kbibtex

webengine

Use dev-qt/qtwebengine for HTML previews

app-text/lcdf-typetools

kpathsea

Enable integration with kpathsea search library (TeX related)

app-text/libebook

tools

Build file conversion tools

app-text/libgepub

webkit

Build with GepubWidget based on Webkit

app-text/libmwaw

tools

Build file conversion tools

app-text/libqxp

tools

Build file conversion tools

app-text/libstaroffice

tools

Build conversion tools

zlib

Enable support for compressed data

app-text/libwpd

tools

Build file conversion tools

app-text/libwps

tools

Build file conversion tools

app-text/mandoc

cgi

build man.cgi web plugin for viewing man pages

system-man

set as the default man provider

app-text/mathtex

png

Generate png images by default instead of gif

app-text/msort

heap

Use heap instead of alloca()

icu

Use dev-libs/icu instead of dev-libs/libutf8proc.

libuninum

Use dev-libs/libuninum for conversion.

app-text/mupdf

archive

Enable support for CBR and other archive formats using libarchive

app-text/pandoc

embed-data-files

Embed data files in binary for relocatable executable.

trypandoc

Build trypandoc cgi executable.

app-text/pandoc-bin

pandoc-symlink

Install pandoc symlink that points to pandoc-bin

app-text/pandoc-cli

lua

Support custom modifications and conversions with the pandoc Lua scripting engine.

nightly

Add '-nightly-COMPILEDATE' to the output of '--version'.

server

Include support for running pandoc as an HTTP server.

app-text/pdfgrep

unac

Removing accents and ligatures before search

app-text/pdfjam

extra

Install unsupported wrapper scripts, for example pdf90, pdfnup, pdfjoin

app-text/pdfpc

gstreamer

Compile support for movie playback (media-libs/gstreamer)

soup

Compile support for REST server (net-libs/libsoup)

webkit

Enable viewing Markdown notes (net-libs/webkit-gtk)

app-text/pelican

markdown

Markdown support

app-text/podofo

boost

Add support for boost

tools

Build and install commandline tools.

app-text/poppler

boost

Use boost::small_vector for a serious performance gain

gpgme

Enable signatures handling with app-crypt/gpgme

nss

Enable signatures handling with dev-libs/nss

utils

Install command-line PDF converters and various utilities.

app-text/qpdfview

fitz

Use experimental fitz rendering, provided by app-text/mupdf, instead of poppler

synctex

Add support for searching TeX sources

app-text/robodoc

examples

Installs usage examples in /usr/share for Perl

app-text/sdcv

darkterm

Improve readability of color output on terminals with dark background.

app-text/sigil

plugins

Installed needed Python packages for using Sigil plugins

system-mathjax

Use the system-wide dev-libs/mathjax instead of bundled

app-text/sword

clucene

Use dev-cpp/clucene for lucene search support

app-text/tessdata_best

osd

Enable support orientation and script detection.

app-text/tessdata_fast

osd

Enable support orientation and script detection.

app-text/tessdata_legacy

math

Enable support for recognition of equations.

osd

Enable support orientation and script detection.

app-text/tesseract

float32

Support float for model training and text recognition (faster, requires less RAM)

training

Install training applications to add support for new languages.

app-text/texlive

context

Add support for the ConTeXt format (dev-texlive/texlive-context)

extra

Add support for extra TeXLive packages

games

Add typesetting support for games (chess, etc.) (dev-texlive/texlive-games)

graphics

Add support for several graphics packages (pgf, tikz,...)

humanities

Add LaTeX support for the humanities (dev-texlive/texlive-humanities)

luatex

Install TeX Live packages that require luatex

metapost

Add support for metapost: A tool for creating graphics in scalable PostScript

music

Add support for music typesetting (dev-texlive/texlive-music)

pdfannotextractor

Add dev-tex/pdfannotextractor support, for extracting annotations from PDF files

pstricks

Add pstricks packages (dev-texlive/texlive-pstricks)

publishers

Add support for publishers (dev-texlive/texlive-publishers)

science

Add typesetting support for natural and computer sciences (dev-texlive/texlive-mathscience)

tex4ht

Add support for dev-tex/tex4ht (for converting (La)TeX to (X)HTML, XML and OO.org)

texi2html

Add support for app-text/texi2html which converts texi files to HTML

xetex

Add support for XeTeX macros (dev-texlive/texlive-xetex)

app-text/texlive-core

luajittex

Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster.

xetex

Add support for XeTeX: a TeX system with Unicode and modern font technologies.

xindy

Add support for Xindy: A general-purpose index processor.

app-text/wdiff

experimental

Build experimental utilities (mdiff, unify, wdiff2)

app-text/webgen

builder

Enable programmatic HTML/XML generation

highlight

Enable syntax highlighting for certain plugins

markdown

Markdown support

app-text/writerperfect

abiword

Add support for abiword format using app-text/libabw

ebook

Add support for various ebook formats using app-text/libebook

epub

Add support for conversion to ePub format using app-text/libepubgen

freehand

Add support for freehand format using media-libs/libfreehand

gsf

Add support for structured files using gnome-extra/libgsf

keynote

Add support for keynote format using app-text/libetonyek

mspub

Add support to mspub format using app-text/libmspub

mwaw

Add support to mwaw formats using app-text/libmwaw

pagemaker

Add support to pagemaker formats using media-libs/libpagemaker

qxp

Add support for QuarkXpress documents using app-text/libqxp

visio

Add support for visio format using media-libs/libvisio

wpd

Add support for wpd format using app-text/libwpd

wpg

Add support for wpg format using app-text/libwpg

wps

Add support for wps format using app-text/libwps

zmf

Add support for Zoner Callisto/Draw documents format using media-libs/libzmf

app-text/wv

tools

Install optional utilities considered deprecated in favor of using AbiWord.

app-text/xmlto

text

Support conversion from XML to plain text

app-text/xpdf

cmyk

Include support for CMYK rasterization

i18n

Enable support non-UTF8 national charsets

icons

Generate desktop PNG icons using rsvg-convert from gnome-base/librsvg

libpaper

Use app-text/libpaper to get paper preferences

metric

Use A4 instead of US Letter paper size by default for PostScript output. This option has effect only if libpaper USE flag is disabled

opi

Include support for OPI (Open Prepress Interface) comments

textselect

Allow text selection

utils

Install command-line PDF converters and various utilities

app-text/zathura

synctex

Use libsynctex to get latex codeline from pdf

app-text/zathura-meta

cb

Install plug-in for ComicBook support

epub

Install plug-in E-Book support

app-text/zeal

X

Enable global shortcut support on X11

app-vim/gentoo-syntax

ignore-glep31

Remove GLEP 31 (UTF-8 file encodings) settings

app-xemacs/xemacs-packages-all

mule

Add multi-language support to XEmacs

dev-ada/AdaSAT

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/aws

shared

Build shared library

wsdl

Used to convert ada to wsdl

dev-ada/gnatcoll-bindings

shared

Build shared library

static-pic

Build shared library

dev-ada/gnatcoll-core

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/gnatcoll-db

db2ada

Build gnatcoll_db2ada

gnatinspect

Build gnatinspect

shared

Build shared library

sql

Build sql library

static-pic

Build shared library

xref

Build xref library

dev-ada/gpr

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/gpr-unit-provider

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/gtkada

shared

Build gtkada as shared library

static-pic

Build static library with pic code

dev-ada/lal-refactor

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/langkit

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/libadalang

static-pic

Build static library with pic code

dev-ada/libadalang-tools

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/libgpr

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/spawn

glib

Add support to dev-libs/glib-based mainloop.

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/templates-parser

shared

Build shared library

dev-ada/VSS

shared

Build shared library

static-pic

Build static library with pic code

dev-ada/xmlada

shared

Build shared library

static-pic

Build static library with pic code

dev-build/bazelisk

bazel-symlink

Install bazel symlink that points to bazelisk

dev-build/cmake

dap

Build debugger for CMake with Debug Adapter Protocol support via dev-cpp/cppdap

dev-build/muon

archive

Enable extracting wraps using app-arch/libarchive.

libpkgconf

Enable looking up packages via dev-util/pkgconf.

dev-cpp/benchmark

exceptions

Enable the use of exceptions in the benchmark library

libcxx

Use llvm-runtimes/libcxx instead of libstdc++ as the default stdlib

libpfm

Enable dev-libs/libpfm support

tools

Install some additional Python tools

dev-cpp/eigen

adolc

Add test support for Adolc (sci-libs/adolc)

benchmark

Build benchmark suite

boost

Add test support for Boost.Multiprecision (dev-libs/boost)

cholmod

Add test support for CHOLMOD (sci-libs/cholmod)

clang

Use clang for cuda units compilation

fftw

Add test support for fftw (sci-libs/fftw)

hip

Enable HIP GPU computing support

klu

Add test support for KLU (sci-libs/klu)

mathjax

Use MathJax for rendering math in HTML docs (dev-libs/mathjax)

opengl

Add test support for OpenGL

openmp

Add test support for the OpenMP (support parallel computing)

pastix

Add test support for PaStiX (sci-libs/pastix)

sparsehash

Add test support for GoogleHash (dev-cpp/sparsehash)

spqr

Add test support for SPQR (sci-libs/spqr)

superlu

Add test support for SuperLU (sci-libs/superlu)

umfpack

Add test support for UMFPACK (sci-libs/umfpack)

dev-cpp/glog

gflags

Use dev-cpp/gflags for flag parsing

libunwind

Use libunwind library (sys-libs/libunwind or llvm-runtimes/libunwind) instead of built-in fallback implementation for stack unwinding

dev-cpp/gtest

abseil

Build with functionality provided by dev-cpp/abseil-cpp and dev-libs/re2

dev-cpp/jwt-cpp

picojson

Enable use of dev-cpp/picojson

dev-cpp/libcmis

tools

Build client tool for testing and viewing features

dev-cpp/libjson-rpc-cpp

http-client

Build support for HTTP client using net-misc/curl

http-server

Build support for HTTP server using net-libs/libmicrohttpd

redis-client

Build support for Redis client using dev-libs/hiredis

redis-server

Build support for Redis server using dev-libs/hiredis

stubgen

Build header stub code generator (needed for development and when pregenerated headers are not bundled)

dev-cpp/msgpack-cxx

boost

Enable boost support

dev-cpp/opentelemetry-cpp

jaeger

Include the jaeger exporter

prometheus

include the Prometheus Client in the SDK

dev-cpp/sdbus-c++

systemd

Use external libsystemd instead of statically-linked build

tools

Install interface stub code generator

dev-db/etcd

server

Installs etcd daemon

dev-db/firebird

server

Install the server components of Firebird, not just the client

xinetd

Install ClassicServer

dev-db/mariadb

backup

Build mariadb-backup which supports SST and hot backup of InnoDB, Aria and MyISAM including compression and encryption

columnstore

Build the ColumnStore storage engine

extraengine

Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)

galera

Enables galera replication

innodb-lz4

Enables lz4 compression methods for InnoDB/XtraDB

innodb-lzo

Enables lzo compression methods for InnoDB/XtraDB

innodb-snappy

Enables snappy compression methods for InnoDB/XtraDB using app-arch/snappy

jdbc

Enable the CONNECT engine to access foreign databases via JDBC

latin1

Use LATIN1 encoding instead of UTF8

mroonga

Add support for the Mroonga engine for interfacing with the Groonga text search

numa

Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)

oqgraph

Add support for the Open Query GRAPH engine

pam

Enable the optional PAM authentication plugin for the server

profiling

Add support for statement profiling (requires USE=community).

rocksdb

Add support for RocksDB; a key/value, LSM database optimized for flash storage

s3

Build the S3 storage engine

server

Build the server program

sphinx

Add suport for the sphinx full-text search engine

sst-mariabackup

Add tools needed to support the mariabackup SST method

sst-rsync

Add tools needed to support the rsync SST method

systemtap

Build support for profiling and tracing using dev-debug/systemtap

test

Install upstream testsuites for end use.

yassl

Enable SSL connections and crypto functions using the bundled yaSSL

dev-db/mongodb

mongosh

Install the MongoDB shell from app-admin/mongosh-bin

tools

Install the MongoDB tools (mongoimport, mongodump...) from app-admin/mongo-tools

dev-db/mycli

ssh

Add support for connection over SSH tunnel

dev-db/mysql

cjk

Add CJK support for InnoDB fulltext search using app-text/mecab

client-libs

Build the client libraries from the server package instead of the C Connector packages (not recommended)

experimental

Build experimental features aka "rapid" plugins

latin1

Use LATIN1 encoding instead of UTF8

numa

Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)

profiling

Add support for statement profiling (requires USE=community).

router

Build the MySQL router program

server

Build the server program

systemtap

Build support for profiling and tracing using dev-debug/systemtap

test

Install upstream testsuites for end use.

dev-db/mysql-connector-c++

legacy

Build the legacy 1.x API as well as the DevX API

dev-db/oracle-instantclient

jdbc

Support for XA, Internationalization, and RowSet operations under JDBC

odbc

Libraries for enabling ODBC applications

precomp

"proc" binary and related files to precompile a Pro*C application

sdk

Header files and an example makefile for developing Oracle applications

sqlplus

The SQL*Plus command line tool for SQL and PL/SQL queries

tools

Data Pump, SQL*Loader and Workload Replay Client

dev-db/percona-server

cjk

Add CJK support for InnoDB fulltext search using app-text/mecab

latin1

Use LATIN1 encoding instead of UTF8

numa

Enable NUMA support using sys-process/numactl (NUMA kernel support is also required)

profiling

Add support for statement profiling (requires USE=community).

rocksdb

Add support for RocksDB; a key/value, LSM database optimized for flash storage

router

Build the MySQL router program

server

Build the server program

tokudb

Add support for TokuDB storage engine

tokudb-backup-plugin

Builds the TokuDB backup plugin

dev-db/pgbouncer

c-ares

Use c-ares as the DNS backend instead of evdns (libevent).

udns

Use udns as the DNS backend instead of evdns (libevent). Supports IPv4 only.

dev-db/pgpool2

memcached

Use memcached for query caching.

dev-db/phpmyadmin

setup

Installs the phpMyAdmin setup utility. Users who don't use the utility should disable this USE flag for security reasons as the setup tool was the target of various exploits in the past.

dev-db/postgis

address-standardizer

Normalize US and CA postal addresses

gtk

Build graphical interface for shp2pgsql (shp2pgsql-gui)

topology

Build topology spatial types and functions

dev-db/postgresql

llvm

Add support for llvm JIT engine

server

Disable to build and install the clients and libraries only.

uuid

Enable server side UUID generation (via dev-libs/ossp-uuid).

dev-db/psqlodbc

iodbc

Use dev-db/libiodbc. Disable to use dev-db/unixODBC.

dev-db/recutils

curl

Enable support for remote descriptors using net-misc/curl

mdb

Build the mdb2rec utility using app-office/mdbtools

dev-db/redict

tcmalloc

Use tcmalloc from dev-util/google-perftools for allocations.

dev-db/redis

tcmalloc

Use tcmalloc from dev-util/google-perftools for allocations.

dev-db/spatialite

geos

Add the sci-libs/geos library for exact topological tests

proj

Add the sci-libs/proj library for reprojection features

rttopo

Add the sci-geosciences/librttopo library for topology support

xls

Add the dev-libs/freexl library for xls import support

dev-db/sqldeveloper

sybase

Add support for the Sybase SQL Database Server

dev-db/sqlite

secure-delete

Enable overwriting of deleted content with zeros by default (http://sqlite.org/pragma.html#pragma_secure_delete), causing some performance penalty

tools

Install additional tools, among which are included: sqlite3-analyzer, sqlite3-changeset, sqlite3-db-dump, sqlite3-diff, sqlite3-rbu, sqlite3-expert and others.

dev-db/sqlitebrowser

sqlcipher

Allow to open and to edit databases encrypted using dev-db/sqlcipher

dev-db/sqlitestudio

cli

Build CLI interface

dev-db/timescaledb

proprietary-extensions

Enable proprietary features/extensions licensed under the TimeScale License

dev-db/unixODBC

minimal

Disable bundled drivers and extra libraries (most users don't need these)

odbcmanual

Administrator, Internal Structure, Programmer and User documentation

dev-debug/bpftrace

lldb

Parse debug info usingllvm-core/lldb

dev-debug/dtrace

test-install

Install the testsuite for manual use. It is not suitable for automatic execution within the ebuild because it requires root privlieges.

dev-debug/gdb

cet

Enable Intel Control-flow Enforcement Technology.

debuginfod

Enable debuginfod support via dev-libs/elfutils libdebuginfod

lzma

Support lzma compression in ELF debug info

multitarget

Support all known targets in one gdb binary

python

Enable support for the new internal scripting language, as well as extended pretty printers

rocm

Enable support for AMD GPU debugging via dev-libs/rocdbgapi

server

Install the "gdbserver" program (useful for embedded/remote targets)

sim

Build gdb's simulators for various hardware platforms. See https://sourceware.org/gdb/wiki/Sim.

source-highlight

Enable listing highlighting via dev-util/source-highlight

xml

Support parsing XML data files needed (at least) for cpu features, memory maps, and syscall tracing

xxhash

Use dev-libs/xxhash to speed up internal hashing.

dev-debug/ltrace

elfutils

Use libdwfl from dev-libs/elfutils for frame unwinding support

unwind

Use sys-libs/libunwind for frame unwinding support

dev-debug/strace

aio

Enable dev-libs/libaio support for tracing Asynchronous I/O operations

elfutils

Enable stack backtraces (-k flag) via dev-libs/elfutils

unwind

Enable stack backtraces (-k flag) via sys-libs/libunwind

dev-debug/sysdig

bpf

Enable the BPF probe as alternative event source to dev-debug/scap-driver.

modules

Build kernel modules needed for tracing local events. Disable this only if you intend to use sysdig purely to work with dumpfiles.

dev-debug/systemtap

debuginfod

Enable debuginfod support via dev-libs/elfutils libdebuginfod

dtrace-symlink

Provide /usr/bin/dtrace symlink pointing to /usr/bin/stap-dtrace. This prevents coinstallation with dev-debug/dtrace.

libvirt

Support probing of libvirt domains.

dev-embedded/avrdude

ftdi

Enable support for USB FTDI chips via dev-embedded/libftdi

dev-embedded/libftdi

tools

build ftdi_eeprom helper tool

dev-embedded/openocd

capstone

Use dev-libs/capstone for disassembly support

cmsis-dap

Support for CMSIS-DAP compliant adapters

dummy

Build the dummy port driver

ftdi

Enable support for USB FTDI chips via dev-embedded/libftdi

gpiod

Enable Linux GPIO bitbang support via libgpiod

jlink

Build the SEGGER J-Link driver

parport

Enable support for parport JTAG devices

verbose-io

Verbose IO and comm JTAG and USB messages

dev-embedded/rpi-eeprom

pi4

Install firmware files for the Raspberry Pi 4

pi5

Install firmware files for the Raspberry Pi 5

dev-embedded/sdcc

boehm-gc

Enable Hans Boehm's garbage collector dev-libs/boehm-gc

device-lib

Enable built of devices libraries

ds390

Add support for Dallas DS390

ds400

Add support for Dallas DS400

ez80-z80

Add support for EZ80-Z80

hc08

Add support for Freescale/Motorola HC08 based

mcs51

Add support for Intel mcs51

mos6502

Add support for MOS 6502

mos65c02

Add support for MOS 65C02

non-free

Enable non-free runtime library parts

packihx

Enable Intel HEX files pack utility

pdk13

Add support for PDK13

pdk14

Add support for PDK14

pdk15

Add support for PDK15

pdk16

Add support for PDK16

pic14

Add support for Microchip 14 bits PICs

pic16

Add support for Microchip 16 bits PICs

r2k

Add support for Rabbit 2000

r2ka

Add support for Rabbit 2000A

r3ka

Add support for Rabbit 3000A

s08

Add support for Freescale/Motorola S08

sdcdb

Enable SDCC source level debugger

sdcpp

Enable SDCC preprocessor based on GCC cpp

sm83

Add support for Gameboy SM83

stm8

Add support for STMicroelectronics STM8

tlcs90

Add support for TLCS-90

ucsim

Enable software simulator for microcontrollers

z180

Add support for Zilog Z180

z80

Add support for Zilog Z80

z80n

Add support for Zilog Z80N

dev-embedded/u-boot-tools

envtools

Build only the target-side environment tools

dev-embedded/urjtag

ftd2xx

Enable support for USB FTDI chips via dev-embedded/libftd2xx

ftdi

Enable support for USB FTDI chips via dev-embedded/libftdi

dev-games/godot

deprecated

Enable support for deprecated features

raycast

Enable the raycast Editor module using media-libs/embree

tools

Enable the Godot Editor for game development

dev-games/guichan

allegro

Build the Allegro frontend

dev-games/mygui

l10n_ru

Install some additional russian docs if 'doc' useflag enabled

ogre

Use the ogre render subsystem. (cannot combine with opengl)

opengl

Use the opengl render subsystem. (cannot combine with ogre)

plugins

Build MyGUI plugins

samples

Install MyGUI demos (needs ogre USE flag)

tools

Build the tools for development

dev-games/ode

double-precision

more precise calculations at the expense of speed

gyroscopic

enable gyroscopic term (may cause instability)

dev-games/ogre

assimp

Use media-libs/assimp to import assets from 3D files

boost

Enable boost support

bullet

Use sci-physics/bullet for physics plugin

cache

Enable GL state cache support

cg

NVIDIA toolkit plugin

deprecated

Build deprecated nodeless positioning of Lights and Cameras.

double-precision

More precise calculations at the expense of speed

egl

Use egl instead of glx

fine-granularity

Enable fine light mask granularity. This impacts on performance and should not be enabled unless an application really needs it.

freeimage

Support images via media-libs/freeimage

gl3plus

Build OpenGL 3+ RenderSystem

gles3

Enable OpenGL ES 3.x Features

json

Use dev-libs/rapidjson (needed by Hlms JSON materials)

legacy-animations

Use the skeletal animation from 1.x. It's much slower, but the new system is still experimental.

ois

Pull in Object-oriented Input System library dev-games/ois for samples

poco

When USE=threads, use poco for threading

resman-pedantic

Resource Manager PEDANTIC : require an explicit resource group. Case sensitive lookup. Some demos might not work with this setting. (default: case-insensitive + sensitive lookup in all groups)

tbb

When USE=threads, use tbb for threading

tools

Build and install AssimpConverter (assimp USE flag is enabled), MeshUpgrader, VRMLConverter and XMLConverter

dev-games/openscenegraph

collada

Enable DAE file support via dev-libs/collada-dom

dicom

Enable DICOM medical image file support via sci-libs/dcmtk

fox

Build examples using x11-libs/fox library

gdal

Enable support for sci-libs/gdal library

las

Enable support for geospatial data LAS LiDAR format using sci-geosciences/liblas

openinventor

Build OpenInventor plugin

osgapps

Build osg applications

sdl2

Use media-libs/libsdl2 additionally to media-libs/libsdl

xrandr

Enable support for the X xrandr extension

dev-games/openscenegraph-openmw

collada

Enable DAE file support via dev-libs/collada-dom

dicom

Enable DICOM medical image file support via sci-libs/dcmtk

fox

Build examples using x11-libs/fox library

gdal

Enable support for sci-libs/gdal library

las

Enable support for geospatial data LAS LiDAR format using sci-geosciences/liblas

openinventor

Build OpenInventor plugin

osgapps

Build osg applications

sdl2

Use media-libs/libsdl2 additionally to media-libs/libsdl

xrandr

Enable support for the X xrandr extension

dev-games/physfs

7zip

Enable 7zip/lzma archive support

grp

Enable Build Engine GRP archive support

hog

Enable Descent I/II HOG archive support

iso

Enable ISO9660 file support

mvl

Enable Descent I/II MVL archive support

qpak

Enable Quake I/II QPAK archive support

slb

Enable Independence War SLB archive support

vdf

Enable Gothic/Gothic II VDF archive support

wad

Enable Doom WAD archive support

dev-games/simgear

dns

Enable DNS resolver via net-libs/udns

gdal

Enable alternative terrain engine based on pagedLOD via sci-libs/gdal

subversion

Enable terrasync scenery downloader

dev-games/tiled

minimal

Exclude optional plugins and development headers

dev-gap/grape

bliss

Use sci-libs/bliss instead of sci-mathematics/nauty as the backend.

dev-haskell/abstract-deque

usecas

Enable the reference implementation to use hardware compare-and-swap.

dev-haskell/aeson

cffi

Controls whether to include c-ffi bits or pure haskell. Default to False for security.

ordered-keymap

Use ordered @Data.Map.Strict@ for KeyMap implementation.

dev-haskell/aeson-pretty

executable

build/install the command-line tool as well as the library

lib-only

don't build 'aeson-pretty' executable.

dev-haskell/ansi-terminal

example

Build the example application

dev-haskell/assoc

tagged

You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/atomic-primops

debug

Enable extra internal checks.

dev-haskell/bifunctors

semigroups

You can disable the use of the `semigroups` package using `-f-semigroups`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

tagged

You can disable the use of the `tagged` package using `-f-tagged`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/bitvec

gmp

Link against the GMP library for the ultimate performance of `zipBits`, `invertBits` and `countBits`. Users are strongly encouraged to enable this flag whenever possible.

dev-haskell/boring

tagged

You can disable the use of the `tagged` package using `-f-tagged`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/c2hs

regression

Enable regression suite build.

dev-haskell/cabal-install

lukko

Use @lukko@ for file-locking

native-dns

Enable use of the [resolv](https://hackage.haskell.org/package/resolv) & [windns](https://hackage.haskell.org/package/windns) packages for performing DNS lookups

dev-haskell/cairo

svg

Build the Scalable Vector Graphics (SVG) backend of Cairo.

dev-haskell/chell

color-output

use colors in program output

dev-haskell/citeproc

executable

Build citeproc executable

icu

Use Haskell bindings to the ICU library

dev-haskell/cmdargs

examples

Build the cmdargs-demo program

quotation

Build the Quote module

testprog

Build the test program

dev-haskell/comonad

indexed-traversable

You can disable the use of the `indexed-traversable` package using `-f-indexed-traversable`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `FunctorWithIndex`

dev-haskell/contravariant

semigroups

You can disable the use of the `semigroups` package using `-f-semigroups`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

statevar

You can disable the use of the `StateVar` package using `-f-StateVar`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

tagged

You can disable the use of the `tagged` package on older versons of GHC using `-f-tagged`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/criterion

embed-data-files

Embed the data files in the binary for a relocatable executable. (Warning: This will increase the executabl size significantly.)

dev-haskell/crypto-api

all-cpolys

Build all the CMAC polynomes up to 10000 bits instead of just the usual ones

dev-haskell/cryptohash-sha256

executable

Build the cryptohash-sha256sum executable

dev-haskell/crypton

check-alignment

extra check on alignment in C layers, which cause lowlevel assert errors. for debugging only.

integer-gmp

Whether or not to use GMP for some functions

old-toolchain-inliner

use -fgnu89-inline to workaround an old compiler / linker / glibc issue.

support-aesni

allow compilation with AESNI on system and architecture that supports it

support-deepseq

add deepseq instances for cryptographic types

support-pclmuldq

Allow compilation with pclmuldq on architecture that supports it

support-rdrand

allow compilation with RDRAND on system and architecture that supports it

support-sse

Use SSE optimized version of (BLAKE2, ARGON2)

target-attributes

use GCC / clang function attributes instead of global target options.

dev-haskell/cryptonite

integer-gmp

Whether or not to use GMP for some functions

target-attributes

use GCC / clang function attributes instead of global target options.

dev-haskell/dlist

werror

Enable -Werror

dev-haskell/doctest-driver-gen

executable

Build the doctest-driver-gen executable

dev-haskell/entropy

donotgetentropy

Avoid use of the getentropy() *nix function. By default getentropy will be used if detected during compilation (this plays poorly with cross compilation).

halvm

Build for the HaLVM.

dev-haskell/foldable1-classes-compat

tagged

You can disable the use of the `tagged` package using `-f-tagged`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/foundation

experimental

Enable building experimental features, known as highly unstable or without good support cross-platform

dev-haskell/glib

closure-signals

Use the the GClosure-based signals implementation.

dev-haskell/gtk2hs-buildtools

closuresignals

Use the the GClosure-based signals implementation.

dev-haskell/hackage-security

lukko

Use @lukko@ for file-locking, otherwise use @GHC.IO.Handle.Lock@

dev-haskell/hashable

random-initial-seed

Randomly initialize the seed on every executable invocation. This is not a security feature and is intended only for testing (it can affect legitimate use cases).

dev-haskell/hashtables

bounds-checking

if on, use bounds-checking array accesses

detailed-profiling

add detailed profiling information to profiled build-depends

dev-haskell/haskeline

terminfo

Use the terminfo package for POSIX consoles.

dev-haskell/hdbc-sqlite3

splitbase

Choose the new smaller, split-up package.

dev-haskell/hslua-cli

executable

Compile `hslua` standalone executable.

dev-haskell/hslua-repl

executable

Compile `luarepl` standalone executable.

dev-haskell/hsyaml

exe

Enable @exe:yaml-test@ component

dev-haskell/http-api-data

text-show

Use text-show library for efficient ToHttpApiData implementations.

dev-haskell/httpd-shed

buildexamples

Build example executables.

dev-haskell/juicypixels

mmap

Enable the file loading via mmap (memory map)

dev-haskell/libyaml

system-libyaml

Use the system-wide libyaml instead of the bundled copy

unicode

Enable unicode output. Otherwise, unicode characters will be escaped.

dev-haskell/lpeg

rely-on-shared-lpeg-library

Do not build lpeg from source, but trust that lpeg is made available in other ways, e.g., through a system-wide installation. The loader will be replaced with a placeholder function that only emits a message.

dev-haskell/lua

system-lua

Use @pkg-config@ to discover library and include paths. Setting this flag implies `pkg-config`.

dev-haskell/markdown-unlit

executable

Build executable

dev-haskell/monad-logger

template-haskell

Enable Template Haskell support

dev-haskell/monad-par

chaselev

Use Chase-Lev Deques for higher-perf work-stealing.

dev-haskell/nats

binary

enable binary instances

hashable

enable hashable instances

template-haskell

enable template_haskell

dev-haskell/network

devel

using tests for developers

dev-haskell/nothunks

bytestring

Provide instances for bytestring

text

Provide instances for text

vector

Provide instances for vector

dev-haskell/pandoc

embed-data-files

Embed data files in binary for relocatable executable.

dev-haskell/parsec-numbers

parsec1

use dev-haskell/parsec1 instead of dev-haskell/parsec

dev-haskell/parsers

attoparsec

You can disable the use of the `attoparsec` package using `-f-attoparsec`.

binary

You can disable the use of the `binary` package using `-f-binary`.

parsec

You can disable the use of the `parsec` package using `-f-parsec`.

dev-haskell/persistent-sqlite

build-sanity-exe

Build a sanity check test executable

dev-haskell/prettyprinter

buildreadme

Build the readme generator

text

While it's a core value of @prettyprinter@ to use @Text@, there are rare circumstances (mostly when @prettyprinter@ arises as a dependency of test suites of packages like @bytestring@ or @text@ themselves) when this is inconvenient. In this case one can disable this flag, so that @prettyprinter@ fallbacks to @String@.

dev-haskell/quickcheck

template-haskell

Build Test.QuickCheck.All, which uses Template Haskell.

dev-haskell/quickcheck-classes

aeson

You can disable the use of the `aeson` package using `-f-aeson`. This may be useful for accelerating builds in sandboxes for expert users.

binary-laws

Include infrastructure for testing class laws of binary type constructors. It is required that this flag match the value that the `unary-laws` flag was given when building `quickcheck-classes-base`. Disabling `unary-laws` while keeping `binary-laws` enabled is an unsupported configuration.

semigroupoids

You can disable the use of the `semigroupoids` package using `-f-semigroupoids`. This may be useful for accelerating builds in sandboxes for expert users.

semirings

You can disable the use of the `semirings` package using `-f-semirings`. This may be useful for accelerating builds in sandboxes for expert users.

unary-laws

Include infrastructure for testing class laws of unary type constructors. It is required that this flag match the value that the `unary-laws` flag was given when building `quickcheck-classes-base`.

vector

You can disable the use of the `vector` package using `-f-vector`. This may be useful for accelerating builds in sandboxes for expert users.

dev-haskell/quickcheck-classes-base

binary-laws

Include infrastructure for testing class laws of binary type constructors. Disabling `unary-laws` while keeping `binary-laws` enabled is an unsupported configuration.

unary-laws

Include infrastructure for testing class laws of unary type constructors.

dev-haskell/random-bytestring

pcg

compile with support for PCG from pcg-random

dev-haskell/sandi

conduit

Build with conduit

dev-haskell/semialign

semigroupoids

Build with semigroupoids dependency

dev-haskell/sha

exe

Build a sha1 and a sha384 executable similar to 'md5sum'.

dev-haskell/shelly

lifted

run the tests against Shelly.Lifted

dev-haskell/simple-sendfile

allow-bsd

Allow use of BSD sendfile (disable on GNU/kFreeBSD)

dev-haskell/skein

big-endian

When manually selecting the endianness, use big-endian (default is little-endian).

force-endianness

Use a manually selected endian when compiling (see flag 'big-endian').

reference

Use the reference implementation instead of the optimized one.

dev-haskell/skylighting

executable

Whether to build the skylighting program

dev-haskell/skylighting-core

executable

Build skylighting-extract tool

dev-haskell/some

newtype-unsafe

Use implementation using @newtype@ and unsafe @Any@, instead of GADT

dev-haskell/splitmix

optimised-mixer

Use JavaScript for mix32

dev-haskell/tasty

clock

Depend on the clock package for more accurate time measurement

dev-haskell/texmath

executable

Compile test executable.

server

Compile webserver.

dev-haskell/text-short

debug

Enable runtime-checks via 'assert'

dev-haskell/tls

compat

Accept SSLv2 client hello for beginning SSLv3 / TLS handshake

network

Use the base network library

dev-haskell/transformers-base

orphaninstances

Build instances for orphan datatypes.

dev-haskell/typst

executable

Compile executable to be used in testing and development.

dev-haskell/unicode-collation

doctests

Run doctests as part of test suite. Use with: @--write-ghc-environment-files=always@.

executable

Build the unicode-collate executable.

dev-haskell/unix-compat

old-time

build against old-time package

dev-haskell/vector

boundschecks

Enable bounds checking

internalchecks

Enable internal consistency checks at the cost of a significant performance penalty

unsafechecks

Enable bounds checking in unsafe operations at the cost of a significant performance penalty

dev-haskell/vector-algorithms

bench

Build a benchmarking program to test vector-algorithms performance

boundschecks

Enable bounds checking

internalchecks

Enable internal consistency checks at the cost of a significant performance penalty.

properties

Enable the quickcheck tests

unsafechecks

Enable bounds checking in unsafe operations at the cost of a significant performance penalty.

dev-haskell/void

safe

dissable effective but unsafe coersions

dev-haskell/wai-app-static

print

print debug info.

dev-haskell/warp

allow-sendfilefd

Allow use of sendfileFd (not available on GNU/kFreeBSD)

x509

Adds a dependency on the x509 library to enable getting TLS client certificates.

dev-haskell/wcwidth

cli

Enable command line tool

dev-haskell/yaml

executable

Install the yaml2json and json2yaml executables

dev-haskell/yesod-form

network-uri

Get Network.URI from the network-uri package

dev-haskell/zip-archive

executable

Build the Zip executable.

dev-haskell/zlib

bundled-c-zlib

Use the bundled zlib C sources. Requires pkg-config to be False. For windows, this is the default.

non-blocking-ffi

The (de)compression calls can sometimes take a long time, which prevents other Haskell threads running. Enabling this flag avoids this unfairness, but with greater overall cost.

dev-java/ant

antlr

Enable ANTLR Ant tasks

bcel

Enable bcel (bytecode manipulation) Ant tasks

bsf

Enable support for Apache Bean Scripting Framework (dev-java/bsf)

commonslogging

Enable commons-logging Ant tasks

commonsnet

Enable commons-net Ant tasks

imageio

Enable imageio Ant tasks

jai

Enable JAI (Java Imaging) Ant task

jakartamail

Enable Jakartamail Ant task

javamail

Enable JavaMail Ant task

jdepend

Enable Jdepend Ant tasks

jmf

Enable JMF (Java Media Framework) Ant tasks

jsch

Disable Jsch (ssh, scp and related) Ant tasks

junit

Enable JUnit Ant tasks

junit4

Enable JUnit4 Ant tasks

junitlauncher

Enable JUnit5 Ant tasks

log4j

Enable Apache log4j Ant tasks

oro

Enable Apache Oro Ant tasks

regexp

Enable Apache Regexp Ant tasks

resolver

Enable Apache Resolver Ant tasks

swing

Enable Swing Ant tasks

testutil

Enable optional test util classes

xalan

Enable Apache Xalan2 Ant tasks

xz

Enable XZ Ant tasks

dev-java/commons-logging

log4j

Add optional support for log4j

dev-java/dom4j

jaxen

Includes org.jaxen.dom4j package

dev-java/emma

launcher

Install /usr/bin/emma. Collides with sci-biology/emboss.

dev-java/java-config

compat

Install bin/java-config-2 symlink pointing to java-config

dev-java/javacup

ant-task

Build and register the ant-task

dev-java/jaxen

dom4j

Includes org.jaxen.dom4j package

jdom

Includes org.jaxen.jdom package

xom

Includes org.jaxen.xom package

dev-java/jflex

ant-task

Build and register the ant-task

dev-java/junit

migration-support

Include the junit-jupiter-migrationsupport module, which helps with migration from JUnit 4 to JUnit Jupiter

suite

Include the JUnit Platform Suite Engine, which adds test suite support

vintage

Include JUnit Vintage, which allows JUnit 5 to run JUnit 3 and JUnit 4 tests

dev-java/openjdk

headless-awt

Don't install the X backend for AWT, needed by some GUIs

javafx

Import OpenJFX modules at build time, via dev-java/openjfx

jbootstrap

Build OpenJDK twice, the second time using the result of the first

source

Install JVM sources

system-bootstrap

Bootstrap using installed openjdk

systemtap

Enable SystemTap/DTrace tracing

dev-java/openjdk-bin

headless-awt

Don't install the X backend for AWT, needed by some GUIs (used to be X flag)

source

Install JVM sources

dev-java/openjdk-jre-bin

headless-awt

Don't install the X backend for AWT, needed by some GUIs (used to be X flag)

dev-java/openjfx

media

Compile media module, based on gstreamer-minimal (does not pull gstreamer)

source

Install JavaFX sources

dev-java/pdfbox

tools

Build and install pdfbox-tools

dev-java/protobuf-java

system-protoc

Use protoc provided by dev-libs/protobuf

dev-java/qdox

ant-task

Build the ant-task

dev-java/rxtx

lfd

Installs and uses LockFileServer daemon (lfd)

dev-java/saxon

ant-task

BUILD and register the ant-task

dev-java/sbt

binary

Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build.

dev-lang/algol68g

mpfr

Add support for multiprecision floating point rouding

dev-lang/ammonite-repl-bin

scala2-13

Install Ammonite for Scala 2.13

scala3-0

Install Ammonite for Scala 3.0

scala3-1

Install Ammonite for Scala 3.1

scala3-2

Install Ammonite for Scala 3.2

dev-lang/crystal

debug

Build each module as a separate object file. Speeds build up.

dev-lang/erlang

kpoll

Enable kernel polling support

dev-lang/gdl

eigen

Build matrix manipulation with dev-cpp/eigen

glpk

Use GNU Linear Programming Kit sci-mathematics/glpk

gshhs

Add support for projection adn continent maps with sci-geosciences/gshhs-data

hdf

Add support for the Hierarchical Data Format v.4

proj

Add support for sci-libs/proj (geographic projections)

shapelib

Add support for manipulating ESRI Shapefiles with sci-libs/shapelib

udunits

Add support for manipulating units of physical quantities

dev-lang/gforth

check

Enable build-time sanity check.

dev-lang/ghc

binary

Install the binary version directly, rather than using it to build the source version.

elfutils

Enable DWARF-based backtraces using dev-libs/elfutils.

ghcbootstrap

Internal: Bootstrap GHC from an existing GHC installation.

ghcmakebinary

Internal: Build binary friendly for redistribution.

gmp

Use dev-libs/gmp for integer operations (works faster, but an external depend).

llvm

Pull in dependencies for the llvm-core/llvm codegen backend.

numa

Enable NUMA thread balancing policy using sys-process/numactl.

unregisterised

Create an unregisterised build in which only the C codegen backend will be available.

dev-lang/gnat-gpl

ada

Build the ADA language (GNAT) frontend

cet

Enable support for Intel Control Flow Enforcement Technology (CET)

d

Enable support for the D programming language

default-stack-clash-protection

Build packages with stack clash protection on by default

default-znow

Request full relocation on start from ld.so by default

fixed-point

Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)

go

Build the GCC Go language frontend.

graphite

Add support for the framework for loop optimizations based on a polyhedral intermediate representation

libssp

Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES)

modula2

Build the GCC Modula-2 language frontend.

objc

Build support for the Objective C code language

objc++

Build support for the Objective C++ language

objc-gc

Build support for the Objective C code language Garbage Collector

pgo

Build GCC using Profile Guided Optimization (PGO)

rust

Build support for the Rust language, installs gccrs.

sanitize

Build support for various sanitizer functions (ASAN/TSAN/etc...)

ssp

Build packages with stack smashing protector on by default

system-bootstrap

Bootstrap using installed Ada compiler

systemtap

enable systemtap static probe points

vtv

Build support for virtual table verification (a C++ hardening feature)

dev-lang/gnucobol

json

Enable support for JSON template formatting via dev-libs/json-c

dev-lang/idris2

chez

build using dev-scheme/chez

racket

build using dev-scheme/racket

test-full

pull in depedndencies to run all tests

dev-lang/inform

tools

Install blorbtools for manipulating Blorb files

dev-lang/ispc

gpu

Enable Level0 GPU support in ispcrt.

openmp

Build with OpenMP task model (otherwise, TBB task model is used).

dev-lang/janet

static-libs

install janet static library archive, you must enable this flag for using `jpm build`

dev-lang/jerryscript

debugger

Install jerry-debugger

dev-lang/jsonnet

custom-optimization

Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)

dev-lang/lazarus

extras

Build a lot of extra packages, including lhelp chm viewer program.

gtk2

Use gtk:2 for widgets.

gui

Build GUI IDE.

minimal

Don't build extra packages from the bigide component

dev-lang/logtalk

fop

Support for generating pdf documentation using fop

xslt

Support for generating html documentation using xslt

dev-lang/lua

deprecated

make deprecated data structures/routines available

dev-lang/luajit

lua52compat

Enable some upwards-compatible features from Lua 5.2 that are unlikely to break existing code.

dev-lang/mercury

trail

Support Mercury trail grades

dev-lang/mercury-extras

tommath

Enable support for tommath library

dev-lang/mlton

binary

install a binary version

bootstrap-smlnj

Boostrap mlton with dev-lang/smlnj (takes a long time)

pax-kernel

Enable if the user plans to run the package under a pax enabled hardened kernel

stage3

After bootstrap building mlton with dev-lang/smlnj, rebuild mlton with the second stage build of mlton (recommended).

dev-lang/moarvm

asan

Enable clang's Address Sanitizer functionality. Expect longer compile time.

clang

Use clang compiler instead of GCC

jit

Enable Just-In-Time-Compiler. Has no effect except on AMD64 and Darwin.

optimize

Enable optimization via CFLAGS

ubsan

Enable clang's Undefined Behavior Sanitizer functionality. Expect longer compile time.

dev-lang/mono

pax-kernel

Enable if the user plans to run the package under a pax enabled hardened kernel

xen

Make mono generate code that is considerably faster on xen VMs but slightly slower on for normal systems.

dev-lang/neko

apache

Build Apache modules

dev-lang/nim

test-js

Enable tests that require Node.js

dev-lang/nqp

clang

Toggle usage of the clang compiler in conjunction with MoarVM

moar

Build the MoarVM backend (experimental/broken)

dev-lang/ocaml

flambda

Enables the Flambda optimizer: A new intermediate representation (introduced in ocaml 4.03) in the depths of the compiler designed to allow for better inlining.

spacetime

Enables the Spacetime memory profiler. See https://caml.inria.fr/pub/docs/manual-ocaml/spacetime.html for more information.

dev-lang/php

apparmor

Support FPM application confinement through sys-libs/libapparmor

argon2

Enable password hashing algorithm from app-crypt/argon2

bcmath

Enable the BCMath Arbitrary Precision Mathematics extension

capstone

Support opcache JIT disassembly through dev-libs/capstone

cli

Enable the Command-Line Interface (CLI) SAPI

coverage

Include gcov symbols for test coverage and lcov reports. Only useful for extension developers, and requires GCC.

ctype

Enable the Character type checking (ctype) extension

embed

Enable embed SAPI

enchant

Enable the Enchant spelling library extension using app-text/enchant

ffi

Enable the Foreign Function Interface (FFI) extension using dev-libs/libffi

fileinfo

Enable the File Information extension

filter

Enable the Data Filtering extension

flatfile

Add dbm support for flat files

fpm

Enable the FastCGI Process Manager SAPI

gd

Enable the Image Processing and GD extension (requires media-libs/libjpeg-turbo and media-libs/libpng)

inifile

Add dbm support for .ini files

intl

Enables the intl extension for extended internalization support

ipv6

Support IPv6 connectivity in fopen and friends, and v6 address conversions in functions like inet_pton and inet_ntop.

jit

Enable PCRE JIT support

ldap-sasl

Add SASL support for the PHP LDAP extension using dev-libs/cyrus-sasl

lmdb

Enable support for dev-db/lmdb db backend

opcache

Enables built-in opcode cache, replacing pecl-apc et al.

opcache-jit

Enable Just In Time (JIT) compilation within the opcache extension

pcntl

Enable the Process Control extension

pdo

Enable the PHP Data Objects extension

phar

Enables the phar extension to provide phar archive support

phpdbg

Enable the PHP Debug Command Line SAPI (like gdb for php)

session-mm

Include dev-libs/mm support for session storage

sharedmem

Enable the shmop extension

simplexml

Enable the SimpleXML extension

sodium

Enable support for crypto through dev-libs/libsodium

sysvipc

Enable the PHP System-V semaphore, shared memory and IPC extension

tokenizer

Add support for the PHP file parser

tokyocabinet

Enable support for dev-db/tokyocabinet db backend

xmlreader

Enable the XMLReader extension

xmlwriter

Enable the XMLWriter extension

xslt

Build the XSL extension

dev-lang/polyml

portable

Build the portable interpreter version of Poly/ML instead of native

dev-lang/pypy

ensurepip

Install the ensurepip module that uses bundled wheels to bootstrap pip and setuptools (if disabled, it will be only possible to use venv `--without-pip`)

full-stdlib

Install complete stdlib as necessary to use PyPy for general purpose programs. By default, only a limited subset that is used when building PyPy3 executables is installed. Note that PyPy2.7's stdlib contains multiple known vulnerabilities.

symlink

Install "pypy3" symlink, making this PyPy slot the default PyPy3 implementation that is used for building Gentoo packages.

test-install

Install the test suite packages, that are required to run tests in a few reverse dependencies.

dev-lang/python

bluetooth

Build Bluetooth protocol support in socket module

ensurepip

Install the ensurepip module that uses bundled wheels to bootstrap pip and setuptools (if disabled, it will be only possible to use venv `--without-pip`)

jit

Enable experimental Just-In-Time compilation support.

libedit

Link readline extension against dev-libs/libedit instead of sys-libs/readline

pgo

Optimize the build using Profile Guided Optimization (PGO) by running Python's test suite and collecting statistics based on its performance. This will take longer to build.

valgrind

Disable pymalloc when running under dev-debug/valgrind is detected (may incur minor performance penalty even when valgrind is not used)

wininst

Install Windows executables required to create an executable installer for MS Windows

dev-lang/python-exec

native-symlinks

Install generic symlinks like python and python3. If this flag is disabled, only versioned python3.X executables will be available to end users and ebuilds not using python eclasses.

dev-lang/qu-prolog

pedro

Pedro subscription/notification communications system

dev-lang/R

libdeflate

Use app-arch/libdeflate rather than sys-libs/zlib for lazy-loaded R objects.

dev-lang/rakudo

clang

Use Clang to compile the MoarVM backend

moar

Use the MoarVM as backend

dev-lang/ruby

rdoc

Install dev-ruby/rdoc after installing Ruby.

systemtap

Enable SystemTap/DTrace tracing

dev-lang/rust

clippy

Install clippy, Rust code linter

dist

Install dist tarballs (used for bootstrapping)

miri

Install miri, an interpreter for Rust's mid-level intermediate representation (requires USE=nightly, sometimes is broken)

nightly

Enable nightly (UNSTABLE) features (NOTE: it does not install nightly version, just enables features marked as nightly at time of release)

parallel-compiler

Build a multi-threaded rustc (experimental, not tested by upstream)

rust-analyzer

Install rust-analyzer, A Rust compiler front-end for IDEs (language server)

rustfmt

Install rustfmt, Rust code formatter

rust-src

Install rust-src, needed by developer tools and for build-std (cross)

system-llvm

Use the system LLVM installation

wasm

Build support for the wasm32-unknown-unknown target

dev-lang/rust-bin

clippy

Install clippy, Rust code linter

rust-analyzer

Install rust-analyzer, A Rust compiler front-end for IDEs (language server)

rustfmt

Install rustfmt, Rust code formatter

rust-src

Install rust-src, needed by developer tools and for build-std (cross)

dev-lang/souffle

ffi

Support c++ functors with arbitrary number of arguments

swig

Enable SWIG usage, needed for Java and Python bindings

dev-lang/spidermonkey

clang

Use Clang compiler instead of GCC

debug

Enable assertions to allow for easier debugging of programs that link to spidermonkey -- note this will often crash software on regular end-user systems

dev-lang/swig

ccache

build ccache-swig(a fast compiler cache)

dev-lang/swi-prolog

archive

Use libarchive for extension packs

cli

Add support for CLI interfaces based on readline and libedit

ipc

Add support for TIPC inter-process communication

pgo

Optimize the build using Profile Guided Optimization (PGO)

yaml

Use libyaml for YAML pack

dev-lang/vala

valadoc

Installs valadoc documentation generation tool

dev-lang/xsb

mariadb

Enable support for the mariadb database backend

dev-lang/yap

R

Enable support for connecting R to Prolog

raptor

Enable support for Raptor RDF syntax libarary

dev-lang/zig

llvm

Build with LLVM backend and extensions enabled.

dev-libs/aml

examples

Build and install examples

dev-libs/antlr-c

debugger

Compiles debug info into the library

dev-libs/apache-arrow

compute

Build the Arrow Compute Modules

dataset

Build the Arrow Dataset Modules

json

Enables read/write json format

parquet

Enables read/write parquet data format

re2

Build with support for regular expressions using the re2 library

dev-libs/appstream

apt

Enables Debians APT support

dev-libs/appstream-glib

fonts

Enable fonts support for appstream-builder.

stemmer

Add word stemming via dev-libs/snowball-stemmer.

dev-libs/apr

old-kernel

Enable compatibility with older kernels

urandom

Use /dev/urandom instead of /dev/random

dev-libs/apr-util

nss

Install apr_crypto_nss module

openssl

Install apr_crypto_openssl module

dev-libs/atcore

gui

Build test GUI

dev-libs/bitset

tcmalloc

Use tcmalloc from dev-util/google-perftools for allocations

dev-libs/boehm-gc

large

optimize for large heap size (also increases max root sets)

dev-libs/boost

context

Build and install the Boost.Context (and Boost.Fiber) library and all other Boost libraries that depend on it

debug

Build and install only the debug version of the Boost libraries. Only enable this flag if you're developing against boost.

doc

Install the full API documentation documentation. This takes over 200MB of extra disk space.

nls

Build libboost_locale. This library requires compatible C library interfaces, which might not be provided by uClibc or other embedded libraries.

numpy

Optionally build NumPy extensions when Boost.Python is enabled

stacktrace

Build the full Boost.Stacktrace dynamic library instead of relying on the header-only implementation

tools

Build and install the boost tools (bcp, quickbook, inspect, wave)

dev-libs/botan

boost

Use dev-libs/boost

tools

Install optional tools for e.g. hashing

dev-libs/check

subunit

Enable support for the subunit unit test protocol

dev-libs/cyberjack

tools

Build and install optional management tools.

dev-libs/cyrus-sasl

authdaemond

Add Courier-IMAP authdaemond unix socket support (net-mail/courier-imap, mail-mta/courier)

ldapdb

Enable ldapdb plugin

openldap

Add ldap support for saslauthd

sample

Enable sample client and server

srp

Enable SRP authentication

urandom

Use /dev/urandom instead of /dev/random

dev-libs/date

only-c-locale

Build only the C locale

dev-libs/dbus-c++

ecore

Use Ecore integration

glib

Use glib integration

dev-libs/eekboard

libcanberra

Enable support for media-libs/libcanberra

xtest

Enable support for x11-libs/libXtst

dev-libs/efl

bmp

Enable WBMP image loader

dds

Enable DDS image loader

drm

Enable DRM engine

eet

Enable Eet image loader

efl-one

Combine multiple core libraries into one libefl.so

fribidi

Enable bidirectional text support

glib

Enable dev-libs/glib support

harfbuzz

Enable complex text shaping and layout support

hyphen

Enable text hyphenation support

ibus

Enable Intelligent Input Bus

ico

Enable Ico image loader

json

Enable lottie animation support

mono

Enable mono bindings

physics

Enable Bullet physics effects and support

pmaps

Enable PMAPS image loader

psd

Enable PSD image loader

scim

Enable Smart Common Input Method

system-lz4

Use system liblz4 instead of bundled one

tga

Enable Tga image loader

tgv

Enable Tgv image loader

tslib

Enable x11-libs/tslib for touchscreen events

unwind

Enable debug support via sys-libs/libunwind

xcf

Enable XCF image loader

xim

Enable X Input Method

xpresent

Enable x11-libs/libXpresent support

dev-libs/elfutils

debuginfod

Enable debuginfod support, both the debuginfod server and the libdebuginfod client library

lzma

Support automatic decompression of LZMA-compressed files and kernel images

stacktrace

Build experimental eu-stacktrace tool. Relies on integration with dev-util/sysprof. See https://developers.redhat.com/articles/2024/06/11/get-system-wide-profiles-binaries-without-frame-pointers.

utils

Install command-line utilities (all the eu-* programs)

dev-libs/fcgi

html

Install HTML documentation

dev-libs/folks

telepathy

Load contacts from the Telepathy framework

utils

Build the folks-inspect utility

dev-libs/fstrm

utils

Build fstrm utility programs

dev-libs/gf2x

custom-tune

Extra long compile time for tuning hardware specific low-level routines

fft

Build an FFT API for multiplication of 2 polynomials over GF(2)

dev-libs/gjs

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

dev-libs/glib

dbus

Enable dependencies required by glib libraries using dbus service to manage settings saving

elf

Enable support for listing and extracting from ELF resource files with gresource tool

introspection

Enable generating introspection data (requires dev-libs/gobject-introspection )

mime

Pull in shared MIME database that many glib-based applications require at runtime to detect or open files. Warning: do not disable this flag unless installing on a headless server.

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

systemtap

Build support for profiling and tracing using dev-debug/systemtap

utils

Install gtester-report utility to generate test report files for your software; build gresource utility with ELF support.

dev-libs/gmime

smime

Enable experimental S/MIME support

dev-libs/gmp

cpudetection

Enables runtime CPU detection (useful for binpkgs, compatibility on other CPUs). This only works on amd64/x86 at present. If this flag is enabled, GMP will work on a variety of amd64/x86 CPUs and load accelerated routines for use at runtime depending on the CPU in use. This makes it suitable for binary packages (binpkgs). If this flag is disabled, GMP will be tuned for the CPU being used at build-time and may not be usable on other machines.

pic

Force static libraries to be built as PIC to avoid TEXTRELs.

dev-libs/gobject-introspection

doctool

Install g-ir-doc-tool for generating documentation from introspected data

dev-libs/hiredict

shim

Install header shims for the hiredis api.

dev-libs/imath

large-stack

Enables code to take advantage of large stack support

dev-libs/input-pad

eekboard

Enable support for dev-libs/eekboard

xtest

Enable support for x11-libs/libXtst

dev-libs/intel-compute-runtime

l0

Install the oneAPI Level Zero driver alongside the OpenCL one

vaapi

Support the sharing of surfaces with Video Acceleration API (OpenCL Extension #36)

dev-libs/jemalloc

lazy-lock

Enable lazy locking (only lock when multi-threaded)

prof

Enable allocation profiling

stats

Enable statistics calculation/reporting

xmalloc

Add support for xmalloc (abort-on-out-of-memory)

dev-libs/json-glib

nls

Enable native language support (translations)

dev-libs/ktextaddons

designer

Build plugins for dev-qt/designer

dev-libs/libbase58

tools

Build command line base58 tool

dev-libs/libbytesize

tools

Build bscalc python CLI tool

dev-libs/libcdio

minimal

Only build the libcdio library and little more, just to be used to link against from multimedia players. With this USE flag enabled, none of the command-line utilities are built, nor is the CDDA library.

dev-libs/libcec

cubox

Enable support for enable support for the TDA995x

exynos

Enable support for Exynos chipsets

kernel-cec

Enable support for Linux kernel CEC framework

raspberry-pi

Enable support for the Raspberry Pi

tools

Enable build of cec-client and other test and demo executable tools

udev

Enable detection of USB-CEC port by udev

xrandr

Enable detection of active HDMI using xrandr extensions

dev-libs/libcgroup

daemon

Install the configuration tools and init/config files.

tools

Install the cgroup rules processing daemon and init/config files.

dev-libs/libdbusmenu

gtk

Enable support for GTK+2

gtk3

Enable support for GTK+3

dev-libs/libdex

eventfd

Allow use of eventfd

liburing

Allow use of liburing (io_uring)sys-libs/liburing

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

dev-libs/libevent

clock-gettime

Disable use of clock_gettime even if it is available

debug

Support for running in debug mode

malloc-replacement

Support for replacing the memory management functions

mbedtls

Support for net-libs/mbedtls encryption

ssl

Support for dev-libs/openssl encryption

verbose-debug

Support for verbose debug logging

dev-libs/libffi

exec-static-trampoline

Don't rely on dynamic code generation for trampolines.

pax-kernel

Use PaX emulated trampolines, for we can't use PROT_EXEC

dev-libs/libffi-compat

pax-kernel

Use PaX emulated trampolines, for we can't use PROT_EXEC

dev-libs/libfido2

hidapi

Enable HID API support

nfc

Enable experimental NFC support

dev-libs/libflatarray

cuda

Enables plugins for NVIDIA GPUs (e.g. CUDAAllocator)

dev-libs/libgcrypt

getentropy

Use getentropy function to obtain randomness from the kernel

dev-libs/libgdata

crypt

Use app-crypt/gcr for keeping tokens and passwords in non-pageable memory for improved security

gnome-online-accounts

Enable net-libs/gnome-online-accounts support

dev-libs/libgit2

gssapi

Enable GSSAPI support for SPNEGO auth

ssh

Enable SSH transport support

trace

Enable tracing support

dev-libs/libgit2-glib

ssh

Enable SSH transport support

dev-libs/libgpg-error

common-lisp

Install common-lisp files

dev-libs/libgpiod

tools

Build some useful gpio tools that use libgpiod.

dev-libs/libical

glib

Enable dev-libs/glib interface support

dev-libs/libisoburn

external-filters

Allow the use of external processes as file content filters (Note: this is a potential security risk)

external-filters-setuid

Also allow the use of external setuid processes as file content filters (Note: this is a potential security risk)

frontend-optional

Use dev-tcltk/bwidget which is not strictly required for the frontend

launch-frontend

Enable the tcl gui for xorriso

launch-frontend-setuid

Enable the tcl gui for xorriso under setuid

dev-libs/libisofs

verbose-debug

Enable verbose debug messages

dev-libs/libjcat

ed25519

Enable ED25519 verification support via dev-libs/nettle and net-libs/gnutls

gpg

Enable GPG verification support via app-crypt/gpgme

pkcs7

Enable PKCS7 verification support via net-libs/gnutls

dev-libs/libjwt

openssl

Use openssl libs for crypto functions

dev-libs/liblogging

rfc3195

Enables RFC 3195 protocol (aka syslog-reliable) support. If you don't know what this is, you don't need it!

stdlog

Enables liblogging's core component (think of it as a the next version of the syslog(3) API).

dev-libs/libmemcached

hsieh

Use Hsieh hash algorithm.

libevent

Use the libevent event loop interface.

sasl

Use sasl auth for communications.

dev-libs/libmemcached-awesome

libevent

Use the libevent event loop interface.

sasl

Use sasl auth for communications.

dev-libs/libnfc

pcsc-lite

Enable NFC drivers that require pcsc-lite

dev-libs/libnl

python

Install experimental dev-lang/python bindings

utils

Install command line interface utils

dev-libs/liborcus

spreadsheet-model

Enable the spreadsheet model implementation

tools

Build various low-level parsers

dev-libs/libowfat

diet

Compile against dev-libs/dietlibc

dev-libs/libp11

doc

Generate and install API documentation for the package.

dev-libs/libpcre

bzip2

Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2).

pcre16

Build PCRE library for 16 bit characters (e.g. UTF-16).

pcre32

Build PCRE library for 32 bit characters (e.g. UTF-32).

readline

Add support for command line editing to pcretest, through sys-libs/readline.

zlib

Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib).

dev-libs/libpcre2

bzip2

Add support for pcregrep command to search within bzip2-compressed files (via app-arch/bzip2).

pcre16

Build PCRE library for 16 bit characters (e.g. UTF-16).

pcre32

Build PCRE library for 32 bit characters (e.g. UTF-32).

readline

Add support for command line editing to pcretest, through sys-libs/readline.

zlib

Add support for pcregrep command to search within gzip-compressed files (via sys-libs/zlib).

dev-libs/libpeas

glade

Install the glade catalog

javascript

Enable JavaScript support using dev-libs/gjs

python

Build support for loading dev-lang/python plugins

dev-libs/libpy

sparsehash

Include libpy wrappers for dev-cpp/sparsehash

dev-libs/librdkafka

lz4

Enable support for Kafka's LZ4 compression based on KIP-57 (uses app-arch/lz4)

dev-libs/librelp

gnutls

Use GnuTLS

openssl

Use OpenSSL

dev-libs/libsecp256k1

ecdh

Enable ECDH shared secret computation

ellswift

Enable ElligatorSwift encoding for public keys

experimental

Allow experimental USE flags

extrakeys

Enable extrakeys module

lowmem

Reduce runtime memory usage at the expense of performance (ecmult window size 4, gen precision 2)

musig

Enable MuSig2 module

recovery

Enable ECDSA pubkey recovery module

schnorr

Enable Schnorr signature module

dev-libs/libslz

tools

Install additional tools (zenc, zdec)

dev-libs/libsodium

urandom

Use /dev/urandom instead of /dev/random

dev-libs/libtermkey

demos

Install demos, which pulls in dev-libs/glib

dev-libs/libtomcrypt

libtommath

Uses dev-libs/libtommath for mathematical operations

tomsfastmath

Uses dev-libs/tomsfastmath for mathematical operations

dev-libs/libucl

regex

Enable regex support

sign

Enable signatures check

urls

Enable URLs fetch

utils

Install utils for checking other configs

dev-libs/libunibreak

doc

Install html API documentation.

dev-libs/libverto

glib

Support event loops using dev-libs/glib

libev

Support event loops using dev-libs/libev

libevent

Support event loops using dev-libs/libevent

dev-libs/libvoikko

expvfst

Enable experimental features of VFST morphology backend

hfst

Enable HFST morphology backend

dev-libs/libxlsxwriter

openssl

Use dev-libs/openssl for MD5 digest

dev-libs/libxmlb

stemmer

Enable language stemming support

dev-libs/libzia

ftdi

Enable support for FTDI USB chips

dev-libs/libzip

mbedtls

Use net-libs/mbedtls as TLS provider

tools

Install binary tools to compare, modify and merge zip files

dev-libs/link-grammar

aspell

Adds support for app-text/aspell spell checker

hunspell

Adds support for app-text/hunspell spell checker

dev-libs/log4cplus

explicit-initialization

Require explicit initialization

iconv

Use inconv for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation

server

Build the logging server

dev-libs/log4cxx

smtp

Offer SMTP support via net-libs/libesmtp

dev-libs/m17n-lib

anthy

Enable support for app-i18n/anthy input method

athena

Enable the MIT Athena widget set (x11-libs/libXaw)

gd

Build API and utilities based on media-libs/gd. This flag is only meaningful if the X USE flag is also enabled

libotf

Use dev-libs/libotf to handle OpenType fonts

libxml2

Use dev-libs/libxml2 to parse XML

X

Build the Graphical User Interface API and utilities

dev-libs/mimalloc

hardened

Enable exploit mitigations

dev-libs/modsecurity

fuzzyhash

Support fuzzy hash computations (to detect malware, for example) using the app-crypt/ssdeep package.

geoip2

Pull in dev-libs/libmaxminddb for use by the SecGeoLookupDb directive.

json

Suppose JSON in the request body parser through dev-libs/yajl.

lmdb

Add LMDB backend support

pcre2

Use dev-libs/libpcre2 as regex implementation

dev-libs/ncnn

tools

Enable installation of various tools in addition to the library

dev-libs/nss

cacert

Include root/class3 certs from CAcert (https://www.cacert.org/)

test-full

Run all available tests, instead of the standard set only

utils

Compile and install all extra binaries, such as certutil, modutil and few more

dev-libs/nwjs

ffmpeg-chromium

Use Chromium FFmpeg fork (media-video/ffmpeg-chromium) rather than mainline FFmpeg (media-video/ffmpeg)

dev-libs/oneDNN

cblas

Use virtual/cblas for sgemm routines

mkl

Use sci-libs/mkl for sgemm routines

dev-libs/onigmo

combination-explosion-check

enable combination explosion check

crnl-as-line-terminator

enable CR+NL as line terminator

dev-libs/oniguruma

crnl-as-line-terminator

Enable CR+NL as line terminator

dev-libs/opencryptoki

tpm

Enable support for Trusted Platform Module (TPM) using app-crypt/trousers

dev-libs/openct

debug

Add debug output to the driver library for pcsc-lite.

pcsc-lite

Build a driver library for sys-apps/pcsc-lite, providing PC/SC API access to devices supported by OpenCT.

dev-libs/openobex

irda

Enable IrDA support

dev-libs/opensc

ctapi

Use CT-API for accessing Smartcard hardware

notify

Enable notifications

openct

Use dev-libs/openct (and CT-API) for accessing Smartcard hardware

pace

Use dev-libs/openpace for EAC version 2 support

pcsc-lite

Use sys-apps/pcsc-lite (and PC/SC API) for accessing Smartcard hardware

secure-messaging

Enable secure messaging

dev-libs/openssl

bindist

Disable/Restrict EC algorithms (as they seem to be patented) -- note: changes the ABI

fips

Enable FIPS provider

ktls

Enable support for Kernel implementation of TLS (kTLS)

quic

Enable support for QUIC (RFC 9000); a UDP-based protocol intended to replace TCP

rfc3779

Enable support for RFC 3779 (X.509 Extensions for IP Addresses and AS Identifiers)

sslv2

Support for the old/insecure SSLv2 protocol -- note: not required for TLS/https

sslv3

Support for the old/insecure SSLv3 protocol -- note: not required for TLS/https

tls-compression

Enable support for discouraged TLS compression

tls-heartbeat

Enable the Heartbeat Extension in TLS and DTLS

weak-ssl-ciphers

Build support for SSL/TLS ciphers that are considered "weak"

dev-libs/openssl-compat

bindist

Disable/Restrict EC algorithms (as they seem to be patented) -- note: changes the ABI

rfc3779

Enable support for RFC 3779 (X.509 Extensions for IP Addresses and AS Identifiers)

sslv2

Support for the old/insecure SSLv2 protocol -- note: not required for TLS/https

sslv3

Support for the old/insecure SSLv3 protocol -- note: not required for TLS/https

tls-compression

Enable support for discouraged TLS compression

tls-heartbeat

Enable the Heartbeat Extension in TLS and DTLS

weak-ssl-ciphers

Build support for SSL/TLS ciphers that are considered "weak"

dev-libs/optix

headers-only

Download and install only the header files

dev-libs/pkcs11-helper

nss

Enable NSS crypto engine

dev-libs/pocl

accel

Enable the generic hardware accelerator device driver

conformance

Ensures that certain build options which would result in non-conformant pocl build stay disabled. Note that this does not quarantee a fully conformant build of pocl.

float-conversion

When enabled, OpenCL printf() call's f/e/g formatters are handled by pocl. When disabled, these are handled by system C library.

hardening

Enable hardening against various attacks. May worsen performance

hwloc

Enable hwloc support

memmanager

Enables custom memory manager. Except for special circumstances, this should be disabled

dev-libs/poco

7z

Add Support for the 7z archive format

activerecord

Add ActiveRecord support

cppparser

Build and install a minimal C++ parser

data

Database abstraction layer to easily send/retrieve data to/from various databases

file2pagecompiler

Utility to convert ordinary files to Page Compiler source files

json

Add JSON support

jwt

Add JSON Web Token support

mariadb

Prefer dev-db/mariadb-connector-c over dev-db/mysql-connector-c

mongodb

Add dev-db/mongodb support

net

Classes to write network clients & servers

pagecompiler

Simple compiler translating HTML pages containing embedded C++ code into HTTPRequestHandler classes

pocodoc

POCO documentation generator

prometheus

Add prometheus monitoring system support

ssl

Encryption and digital signing classes

util

Several utility classes (like logger, timer, config file parser)

zip

Add support for the zip & gz archive formats

dev-libs/ppl

cdd

Build the ppl_lcdd program for vertex/facet enumeration accepting the same input format as the programs shipped with sci-libs/cddlib and sci-libs/lrslib

lpsol

Build the ppl_lpsol linear program solver that uses sci-mathematics/glpk for its input routines

dev-libs/protobuf

conformance

Build conformance tests

libprotoc

Build libprotoc

libupb

Build libupb

protobuf

Build protobuf libraries and protoc compiler

protoc

Build libprotoc and protoc compiler

dev-libs/qcoro

network

Build dev-qt/qtbase network support

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

websockets

Build dev-qt/qtwebsockets support

dev-libs/qcoro5

network

Build dev-qt/qtnetwork support

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

testlib

Install coroutine-friendly versions of dev-qt/qttest macros

websockets

Build dev-qt/qtwebsockets support

dev-libs/qhotkey

qt6

Use Qt6 dependencies

dev-libs/quazip

qt5

Build with Qt5 support

qt6

Build with Qt6 support

dev-libs/raft

zfs

ZFS support

dev-libs/re2

benchmark

Build a benchmark binary, install it as re2-bench

test-full

Run additional, quite slow tests

dev-libs/rocksdb

numa

Enable NUMA support

tbb

Enable support for dev-cpp/tbb

dev-libs/sentry-native

breakpad

Use dev-util/breakpad as the crash handler

curl

Enable support for automated uploading of crash reports

dev-libs/serd

tools

Build command line utilities

dev-libs/serdisplib

tools

Build optional tools.

dev-libs/sexpp

cli

Build sexp console application

dev-libs/simdjson

all-impls

Enable all implementations rather than only onem

tools

Build and install extra command line tools

dev-libs/softhsm

gost

Enable gost algorithm

migration-tool

Build db migration tool

dev-libs/sord

tools

Build command line utilities

dev-libs/starpu

spinlock-check

Enable spinlock check

dev-libs/thrift

libevent

Build support for dev-libs/libevent

dev-libs/tinyxml

stl

Compile with TIXML_USE_STL support

dev-libs/tntnet

server

Enable tntnet server daemon

dev-libs/totem-pl-parser

archive

Enables ISO detection with app-arch/libarchive

crypt

Support AmazonAMZ decoding with dev-libs/libgcrypt

uchardet

Enable charset discovery via app-i18n/uchardet

dev-libs/tre

agrep

Build agrep tool

alloca

Enable if you want TRE to use alloca() instead of malloc() when allocating memory needed for regexec operations

approx

Enable the approximate matching functionality

dev-libs/uriparser

unicode

Add support for functions working with character type wchar_t (e.g. uriParseSingleUriW with trailing "W") which increases compile time and resulting binary file size by roughly factor 2.

dev-libs/weston

desktop

Enable the desktop shell

drm

Enable drm compositor support

editor

Install wayland-editor example application

fullscreen

Enable fullscreen shell

gles2

Enable the GLESv2 renderer, not just the x11-libs/pixman-based software fallback

headless

Headless backend and a noop renderer, mainly for testing purposes

ivi

Enable the IVI shell

kiosk

Enable the kiosk shell

pipewire

Enable virtual remote output with Pipewire on DRM backend

rdp

Enable Remote Desktop Protocol compositor support

remoting

Enable plugin to stream output to remote hosts using media-libs/gstreamer

resize-optimization

Increase performance, allocate more RAM. Recommended to disable on Raspberry Pi

screen-sharing

Enable screen-sharing through RDP

wayland-compositor

Enable Wayland compositor support

xwayland

Enable ability support native X11 applications

dev-libs/xerces-c

iconv

Use iconv (virtual/libiconv) as message loader and transcoder (in general it would be possible to use iconv only as message loader and something else like icu or the native method as transcoder and vice-versa, but this is a less common case and hard to handle)

threads

Enable threading support through pthread (or other libraries on AIX, IRIX, HPUX, Solars). Highly recommended

dev-libs/xmlrpc-c

abyss

Build the Abyss mini web-server.

libxml2

Use dev-libs/libxml2 to parse XML instead of the internal expat library.

threads

Controls whether to build the Abyss web-server with pthreads or fork 'threading'.

dev-libs/xmlsec

gcrypt

Install xmlsec-gcrypt library

gnutls

Install xmlsec-gnutls library

http

Allow fetching over HTTP via libxml2.

nss

Install xmlsec-nss library

openssl

Install xmlsec-openssl library

dev-libs/yaz

ziffy

Install ziffy, a promiscuous Z39.50 APDU sniffer

dev-lisp/clisp

hyperspec

Use local hyperspec instead of online version

svm

Build CLISP with support for the Support Vector Machine module

dev-lisp/clx

doc

Builds documentation

dev-lisp/cmucl

doc

Installs package documentation

gui

Build CLX, CLM, or Hemlock

source

Include source code for CMUCL in installation

dev-lisp/ecl

gengc

Use generational garbage collection (experimental)

precisegc

Use type information during garbage collection (experimental)

unicode

Make the produced lisp support unicode

dev-lisp/gcl

ansi

Build a GCL with ANSI support (else build a traditional CLtL1 image)

athena

Build xgcl - an interface to x11-libs/libXaw

dev-lisp/sbcl

system-bootstrap

Bootstrap SBCL using either system SBCL installation or dev-lisp/clisp

unicode

Make the produced lisp support unicode

dev-lua/lua-cjson

internal-fpconv

Enable internal number conversion routines, can increase overall performance by up to 50%

dev-ml/lablgtk

sourceview

Enable GtkSourceView (x11-libs/gtksourceview) support

dev-ml/logs

cli

Enables the Logs_cli library that provides command line support for controlling Logs.

fmt

Enables the Logs_fmt reporter.

lwt

Enables the Logs_lwt library that provides Lwt logging functions.

dev-ml/ocaml-fileutils

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/ocaml-gettext

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/ocaml-gettext-camomile

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/ocaml-gettext-stub

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/ocamlnet

httpd

Enables net-httpd web server component

zip

Enables netzip support to read/write gzip data using object channels

dev-ml/stdlib-shims

ocamlopt

Whether the OCaml native code compiler is used. Must be set globally and match dev-lang/ocaml.

dev-ml/tiny_httpd

camlzip

Interface to camlzip for tiny_httpd

dev-ml/uutf

utftrip

Builds and install the utftrip executable: Among other things, reads unicode on stdin and rewrites it on stdout.

dev-perl/App-Nopaste

browser

Spawn browser with pasted page

clipboard

copying of URLs with -x/--copy

gitlab

Ensure git is installed for reading/passing GitLab authentication

pastebin

pastebin.com support

dev-perl/Boulder

genbank

Provide support with Boulder::Genbank for decoding Genbank data records

store

Provide support with Boulder::Store for persisting Stone objects

dev-perl/Business-ISBN

barcode

Install dev-perl/GD-Barcode for rendering ISBN numbers as barcodes

dev-perl/Config-Any

conf

Install dev-perl/Config-General to support decoding .conf/.cnf files

ini

Install dev-perl/Config-Tiny to support decoding INI config files

json

Install support libraries to support decoding JSON config files

xml

Install support libraries to support decoding XML config files

yaml

Install support libraries to support decoding YAML config files

dev-perl/Cookie-Baker

xs

Install dev-perl/Cookie-Baker-XS for accelerated performance

dev-perl/Coro

ev

Build support for using dev-perl/EV as an event-loop via Coro::EV

event

Build support for using dev-perl/Event as an event-loop via Coro::Event

dev-perl/DBD-MariaDB

mariadb

Use dev-db/mariadb-connector-c as the client library

mysql

Use dev-db/mysql-connector-c as the client library

dev-perl/DBD-mysql

mariadb

Use dev-db/mariadb-connector-c as the client library

mysql

Use dev-db/mysql-connector-c as the client library

ssl

Compile in support for SSL connections via libmysqlclient

dev-perl/DBD-SQLite

system-sqlite

Use the system-wide dev-db/sqlite installation

dev-perl/DBIx-Class

admin

Modules required for the DBIx::Class administrative library

admin-script

Modules required for the CLI DBIx::Class interface dbicadmin

deploy

Modules required for "deploy" in DBIx::Class::Storage::DBI and "deploymen_statements" in DBIx::Class::Storage::DBI

replicated

Modules required for DBIx::Class::Storage::DBI::Replicated

dev-perl/File-HomeDir

xdg

Ensure XDG Semantics for returned paths via x11-misc/xdg-user-dirs

dev-perl/File-Which

pwhich

Install dev-perl/App-pwhich which used to be a part of this package

dev-perl/GD

animgif

Enable animated gif support

fcgi

Build for FastCGI compatibility via dev-libs/fcgi instead of using PerlIO

dev-perl/HTML-Mason

modperl

Enable www-apache/mod_perl support

dev-perl/HTTP-Entity-Parser

xs

Install C-Based dependieces for faster performance

dev-perl/JSON

xs

Install C-based dev-perl/JSON-XS for faster performance

dev-perl/JSON-MaybeXS

xs

Install a C-Based backend to make JSON encode/decode fast

dev-perl/List-MoreUtils

xs

Install C-Based backend implementation for performance

dev-perl/Mail-IMAPClient

md5

Install support for DIGEST-MD5 and CRAM-MD5 Authentication

ntlm

Install support for NTLM Authentication

ssl

Install support for SSL Connections

zlib

Install support for COMPRESS DEFLATE connections

dev-perl/MCE

sereal

Install dev-perl/Sereal-Encoder and decoder for faster worker IPC

dev-perl/Net-SSH2

gcrypt

Use libgcrypt instead of openssl

dev-perl/PDL

badval

Enable bad values support

hdf

Enable HDF (version 4) format support

netpbm

Enable NETPBM and MPEG support

pdl2

Build pdf2 shell (requires Devel-REPL)

pgplot

Enable PGPLOT plotting capabilities

dev-perl/perl-headers

debug

Add source locations in generated .ph files to assist with debugging when errors occur

sizeof-warning

Include logic to warn when a .ph file tries to use a sizeof() that is unknown

dev-perl/Ref-Util

xs

Install C-Based dev-perl/Ref-Util-XS for accelerated performance

dev-perl/Sub-Name

dev-perl/Sysadm-Install

hammer

Enable hammer() funtion to run a command in the shell and simulate a user hammering the ENTER key to accept defaults on prompts

dev-perl/Test-Warnings

dev-perl/Text-CSV

xs

Install dev-perl/Text-CSV_XS for accelerated decoding

dev-perl/WWW-Form-UrlEncoded

xs

Install C-Based dependieces for faster performance

dev-php/maxmind-db-reader

extension

Build the C extension that uses dev-libs/libmaxminddb

dev-php/pecl-apcu

lock-pthreadmutex

Enable pthread mutex locking

lock-pthreadrw

Enable pthread read/write locking

lock-semaphore

Enable semaphore locks instead of fcntl

lock-spinlock

Enable spin locks (EXPERIMENTAL)

dev-php/pecl-event

extra

Add support of the Libevent extra API

dev-php/pecl-memcached

igbinary

Enable support for the igbinary serializer

json

Enable support for json serialization

dev-php/pecl-redis

igbinary

Enables igbinary serialisation support

json

Enables json serializer support

dev-python/amqp

extras

Install extra tools to generate initial Python mod from an AMQP XML file

dev-python/apprise

dbus

Support sending notifications to the desktop over D-Bus

mqtt

Support sending notifications over MQTT

dev-python/autobahn

xbr

Add support for XBR decentralized data markets and etherium blockchain

dev-python/blake3

rust

Build the Rust implementation (if disabled, the "experimental" C implementation is used instead).

dev-python/bpython

clipboard

Enable copying to clipboard using dev-python/pyperclip

jedi

Enable autocompletion using dev-python/jedi

watch

Enable watching paths using dev-python/watchdog

dev-python/cbor2

native-extensions

Compiles native "C" extensions (speedups, instead of using python fallback code).

dev-python/cvxopt

dsdp

Use interior point library sci-libs/dsdp

glpk

Use GNU Linear Programming Kit sci-mathematics/glpk

dev-python/dnspython

dnssec

Use dev-python/cryptography to enable low-level DNSSEC RSA, DSA, ECDSA and EdDSA signature validation.

dev-python/editorconfig

cli

Install command line interface as well as python library

dev-python/fritzconnection

qrcode

Install dependencies needed to generate QR Codes for WiFi login.

dev-python/frozenlist

native-extensions

Compile native C extensions (speedups, instead of using Python fallback code).

dev-python/google-api-core

grpc

Pull (heavy) gRPC dependencies in, that are optionally required by part of the API.

dev-python/httpx

cli

Install the CLI "httpx" client.

dev-python/hypothesis

cli

Install a CLI tool used to write tests.

dev-python/icalendar

doc

Generate examples and other extra documentation

dev-python/immutables

native-extensions

Compiles native "C" extensions (speedups, instead of using Python fallback code).

dev-python/ipython

nbconvert

Enable support for converting notebooks to various formats using app-text/pandoc

notebook

Install requirements for the web notebook based on dev-python/tornado

dev-python/markdown-exec

ansi

Enable support for rendering ANSI colours in HTML code blocks

dev-python/matplotlib

excel

Pull dev-python/xlwt for the exceltools toolkit

gtk3

Enable x11-libs/gtk+:3 support

webagg

Enable webagg backend that uses dev-python/tornado

dev-python/mido

portmidi

Support using media-libs/portmidi as MIDI back-end

rtmidi

Support using media-libs/rtmidi as MIDI back-end

dev-python/mkdocs-material

social

Install the dependencies of the "social" plugin.

dev-python/msgpack

native-extensions

Compiles native "C" extensions (speedups, instead of using python fallback code).

dev-python/multidict

native-extensions

Compile native C extensions (speedups, instead of using Python fallback code).

dev-python/mypy

native-extensions

Compiles native C extensions (speedups, instead of using Python fallback code).

dev-python/netcdf4

blosc

Allow using blosc compression via dev-libs/c-blosc

dev-python/pandas

full-support

Pull all packages to give pandas full support

dev-python/paramiko

server

Enable server feature

dev-python/peewee

native-extensions

Compiles native C extension for more complete SQLite3 support.

dev-python/pillow

imagequant

Build with Image Quantization Library support

dev-python/pivy

quarter

Use media-libs/quarter for GUI bindings

soqt

Use media-libs/SoQt for GUI bindings

dev-python/pyarrow

parquet

Enables read/write parquet data format

dev-python/pyglet

image

Enable support for image formats other than PNG and BMP

dev-python/pymongo

native-extensions

Compiles native C extensions

test-full

Run test suite in full, including tests that run a local database instance.

dev-python/pyopengl-accelerate

numpy

Building NumPy native format handlers.

dev-python/pypax

ptpax

Enable PT_PAX_FLAGS support.

xtpax

Enable XATTR_PAX_FLAGS support.

dev-python/pypy

full-stdlib

dev-python/pypy3

test-install

Install the test suite packages, that are required to run tests in a few reverse dependencies.

dev-python/pypy3_10-exe

low-memory

Build using PyPy with the engine configured towards low memory footprint. This makes it possible to build PyPy using ~3.5G of RAM on amd64 and ~half of that on x86, at the cost of lengthened build time.

dev-python/pypy-exe

low-memory

dev-python/pyqt5

bluetooth

Build bindings for the QtBluetooth module

dbus

Build bindings for the QtDBus module

declarative

Build bindings for the QtQml and QtQuick modules and enable the qmlscene plugin

designer

Build bindings for the QtDesigner module and enable the designer plugin

gui

Build bindings for the QtGui module

help

Build bindings for the QtHelp module

location

Build bindings for the QtLocation module

multimedia

Build bindings for the QtMultimedia module

network

Build bindings for the QtNetwork module

opengl

Build bindings for the QtOpenGL module

positioning

Build bindings for the QtPositioning module

printsupport

Build bindings for the QtPrintSupport module

sensors

Build bindings for the QtSensors module

serialport

Build bindings for the QtSerialPort module

speech

Build bindings for the QtTextToSpeech module

sql

Build bindings for the QtSql module

svg

Build bindings for the QtSvg module

testlib

Build bindings for the QtTest module

webchannel

Build bindings for the QtWebChannel module

websockets

Build bindings for the QtWebSockets module

widgets

Build bindings for the QtWidgets module

x11extras

Build bindings for the QtX11Extras module

xmlpatterns

Build bindings for the QtXmlPatterns module

dev-python/pyqt6

bluetooth

Build bindings for the QtBluetooth module

dbus

Build bindings for the QtDBus module

designer

Build bindings for the QtDesigner module and enable the designer plugin

gui

Build bindings for the QtGui module

help

Build bindings for the QtHelp module

multimedia

Build bindings for the QtMultimedia module

network

Build bindings for the QtNetwork module

nfc

Build bindings for the QtNfc module

opengl

Build bindings for the QtOpenGL module

pdfium

Build bindings for the QtPdf module (uses pdfium from dev-qt/qtwebengine)

positioning

Build bindings for the QtPositioning module

printsupport

Build bindings for the QtPrintSupport module

qml

Build bindings for the QtQml module and enable the qml plugin

quick

Build bindings for the QtQuick module

quick3d

Build bindings for the QtQuick3D module

remoteobjects

Build bindings for the QtRemoteObjects module

sensors

Build bindings for the QtSensors module

serialport

Build bindings for the QtSerialPort module

spatialaudio

Build bindings for the QtSpatialAudio module

speech

Build bindings for the QtTextToSpeech module

sql

Build bindings for the QtSql module

svg

Build bindings for the QtSvg module

testlib

Build bindings for the QtTest module

webchannel

Build bindings for the QtWebChannel module

websockets

Build bindings for the QtWebSockets module

widgets

Build bindings for the QtWidgets module

xml

Build bindings for the QtXml module

dev-python/pyqt6-webengine

quick

Build bindings for the QtWebEngineQuick module

widgets

Build bindings for the QtWebEngineWidgets module

dev-python/pyrsistent

native-extensions

Compiles native C extensions (speedups, instead of using python fallback code).

dev-python/pyside2

3d

Build Qt3DCore, Qt3DAnimation, Qt3DExtras, Qt3DInput, Qt3DLogic, and Qt3DRender modules

charts

Build QtCharts module

concurrent

Build QtConcurrent module

datavis

Build QtDataVisualization module

designer

Build QtDesigner and QtUiTools modules

gles2-only

Build QtGui "QOpenGL*" classes

gui

Build QtGui module

help

Build QtHelp module

location

Build QtLocation module

multimedia

Build QtMultimedia and QtMultimediaWidgets modules

network

Build QtNetwork module

positioning

Build QtPositioning module

printsupport

Build QtPrintSupport module

qml

Build QtQml module

quick

Build QtQuick and QtQuickWidgets modules

scxml

Build QtScxml module

sensors

Build QtSensors module

speech

Build QtTextToSpeech module

sql

Build QtSql module

svg

Build QtSvg module

testlib

Build QtTest module

webchannel

Build QtWebChannel module

webengine

Build QtWebEngine and QtWebEngineWidgets modules

websockets

Build QtWebSockets module

widgets

Build QtWidgets module

x11extras

Build QtX11Extras module

xml

Build QtXml module

xmlpatterns

Build QtXmlPatterns module

dev-python/pyside6

3d

Build Qt3DCore, Qt3DAnimation, Qt3DExtras, Qt3DInput, Qt3DLogic, and Qt3DRender modules

bluetooth

Build QtBluetooth module

charts

Build QtCharts module

concurrent

Build QtConcurrent module

designer

Build QtDesigner and QtUiTools modules

gles2-only

Build QtGui "QOpenGL*" classes

gui

Build QtGui module

help

Build QtHelp module

httpserver

Build QtHttpServer module

location

Build QtLocation module

multimedia

Build QtMultimedia and QtMultimediaWidgets modules

network

Build QtNetwork module

network-auth

Build QtNetworkAuth module

nfc

Build QtNfc module

pdfium

Build QtPdf module

positioning

Build QtPositioning module

printsupport

Build QtPrintSupport module

qml

Build QtQml module

quick

Build QtQuick and QtQuickWidgets modules

quick3d

Build QtQuick3D and QtQuickWidgets modules

remoteobjects

Build QtRemoteObjects module

scxml

Build QtScxml module

sensors

Build QtSensors module

serialport

Build QtSerialPort modules

spatialaudio

Build QtSpatialAudio module

speech

Build QtTextToSpeech module

sql

Build QtSql module

svg

Build QtSvg module

testlib

Build QtTest module

uitools

Build UITools module

webchannel

Build QtWebChannel module

webengine

Build QtWebEngine and QtWebEngineWidgets modules

websockets

Build QtWebSockets module

widgets

Build QtWidgets module

xml

Build QtXml module

dev-python/python-box

native-extensions

Compiles native C extensions

dev-python/python-lsp-server

all-plugins

Pull in all optional plugins

dev-python/python-mpd2

twisted

Enable twisted support

dev-python/python-stdnum

vies

Enable VIES

dev-python/pyudev

qt5

Install PyQt5 bindings

dev-python/pyzmq

drafts

Enable draft API support

dev-python/qiskit

visualization

Enable visualization modules

dev-python/qtpy

designer

Pull in bindings for the QtDesigner module and enable the designer plugin

gui

Pull in bindings for the QtGui module

help

Pull in bindings for the QtHelp module

multimedia

Pull in QtMultimedia and QtMultimediaWidgets modules

network

Pull in bindings for the QtNetwork module

nfc

Pull in bindings for the QtNFC module

opengl

Pull in bindings for the QtOpenGL module

pdfium

Pull in bindings for the QtPDFium module

positioning

Pull in bindings for the QtPositioning module

printsupport

Pull in bindings for the QtPrintSupport module

pyqt5

Use dev-python/pyqt5 as Qt for Python implementation

pyqt6

Use dev-python/pyqt6 as Qt for Python implementation

pyside2

Use dev-python/pyside2 as Qt for Python implementation

pyside6

Use dev-python/pyside6 as Qt for Python implementation

qml

Build bindings for the QtQml

quick

Build bindings for the QtQuick

quick3d

Build bindings for the QtQuick3D

remoteobjects

Pull in bindings for the QtRemoteObjects module

sensors

Pull in bindings for the QtSensors module

serialport

Pull in bindings for the QtSerialPort module

spatialaudio

Pull in bindings for the QtSpatialAudio module

speech

Pull in bindings for the QtTextToSpeech module

sql

Pull in bindings for the QtSql module

svg

Pull in bindings for the QtSvg module

testlib

Pull in bindings for the QtTest module

webchannel

Pull in bindings for the QtWebChannel module

webengine

Pull in QtWebEngine and QtWebEngineWidgets modules

websockets

Pull in bindings for the QtWebSockets module

widgets

Pull in bindings for the QtWidgets module

xml

Pull in QtXml module

dev-python/rarfile

compressed

Enables the module to support compressed v3 archives by calling the app-arch/unrar.

dev-python/reedsolo

native-extensions

Compile native C extensions.

dev-python/rfc3986

idna

enable support for the IDNA specification (RFC 5891)

dev-python/rpyc

gdb

Run tests depending on dev-debug/gdb

numpy

Run tests depending on dev-python/numpy, dev-python/pandas

dev-python/shiboken2

docstrings

Expose documentation as Python docstrings (recommended)

numpy

Implicitly convert passed NumPy arrays to Qt lists

vulkan

Generate "QSurface::VulkanSurface" bindings

dev-python/shiboken6

docstrings

Expose documentation as Python docstrings (recommended)

numpy

Implicitly convert passed NumPy arrays to Qt lists

vulkan

Generate "QSurface::VulkanSurface" bindings

dev-python/simplejson

native-extensions

Compiles native "C" extensions (speedups, instead of using Python fallback code).

dev-python/stripe

telemetry

Enable sending "telemetry to Stripe regarding request latency and feature usage" by default. Upstream enables it by default in their PyPI distribution; it can also be explicitly controlled via stripe.enable_telemetry variable (boolean).

dev-python/subprocess-tee

test-full

Enable full test mode. Pulls in many additional dependencies, and requires having been emerged without this flag first in order to avoid a circular dependency.

dev-python/sympy

imaging

Add support for dev-python/pillow

ipython

Add support for dev-python/ipython

mathml

Add support for mathml

pyglet

Use dev-python/pyglet for plots and print preview

symengine

Add support for a dev-python/symengine backend

texmacs

Add app-office/texmacs interface

dev-python/tables

cpudetection

Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)

dev-python/tpm2-pytss

fapi

Enable feature API (requires tpm2-tss be compile with thes same)

dev-python/translate-toolkit

html

Support conversion between po and html files

ical

Support conversion between po and ical files

ini

Support conversion between po and ini files

subtitles

Support conversion between po and sub files

yaml

Support YAML format

dev-python/twisted

conch

include Twisted SSHv2 implementation

serial

include serial port support

dev-python/websockets

native-extensions

Compiles native C extensions

dev-python/wrapt

native-extensions

Compiles native C extensions (speedups, instead of using python fallback code).

dev-python/zeep

async

Add async support

dev-qt/designer

declarative

Build the qdeclarativeview plugin

dev-qt/linguist-tools

qml

Enable QML support in lupdate

dev-qt/qdoc

qml

Enable QML/JS parsing support

dev-qt/qt3d

gamepad

Add support for gamepad hardware via dev-qt/qtgamepad

qml

Build QML/QtQuick bindings

dev-qt/qt5compat

qml

Build QML/QtQuick bindings and imports

dev-qt/qtbase

concurrent

Build Qt6Concurrent module

dbus

Build Qt6DBus module

eglfs

Build the EGL Full Screen/Single Surface platform plugin

evdev

Enable support for input devices via evdev

gssapi

Enable support for GSSAPI (virtual/krb5)

gtk

Build the GTK platform theme plugin

gui

Build Qt6Gui module

journald

Log messages using sys-apps/systemd's journald rather than output to stderr (override with the QT_FORCE_STDERR_LOGGING=1 env var)

libinput

Enable support for input devices via dev-libs/libinput

libproxy

Use net-libs/libproxy for automatic HTTP/SOCKS proxy configuration

network

Build Qt6Network module

renderdoc

Enable support for capturing graphic's API calls using media-gfx/renderdoc

sql

Build Qt6Sql module

syslog

Log messages using syslog rather than output to stderr (override with the QT_FORCE_STDERR_LOGGING=1 env var)

tslib

Enable support for touchscreen devices via x11-libs/tslib

widgets

Build Qt6Widgets module

X

Build the XCB platform plugin and enable X11 integration

dev-qt/qtbluetooth

qml

Build QML/QtQuick bindings and imports

dev-qt/qtcharts

qml

Build QML/QtQuick bindings and imports

dev-qt/qtconnectivity

neard

Use net-wireless/neard to access NFC devices

nfc

Enable support for the Near Field Communication protocol

dev-qt/qtcore

old-kernel

Disable syscalls not available on Linux kernels older than 4.11

dev-qt/qt-creator

clang

Build clang-based plugins for C/C++ development (code model, formatting, static analysis)

cmdbridge-server

Build the cmdbridge server using dev-lang/go

designer

Enable designer for QtWidgets-based UIs

help

Enable the integrated dev-qt/qt-docs viewer (also needed for examples)

plugin-dev

Install the 'Devel' component needed to build external Qt Creator plugins

qmldesigner

Build QmlDesigner and related plugins (Insight, StudioWelcome)

serialterminal

Build the serial terminal plugin

tracing

Build plugins for tracing requiring extra dependencies (AppStatisticsMonitor, CtfVisualizer, PerfProfiler, QmlProfiler)

webengine

Use dev-qt/qtwebengine with the help USE rather than bundled litehtml

dev-qt/qtdatavis3d

qml

Build QML/QtQuick bindings and imports

dev-qt/qtdeclarative

localstorage

Build the LocalStorage import for QtQuick (requires QtSql)

network

Enable QtNetwork support

opengl

Enable OpenGL support

qmlls

Build the qmlls tool using dev-qt/qtlanguageserver

sql

Enable QtSQL support

widgets

Enable QtWidgets support

dev-qt/qtdiag

network

Report network information

widgets

Report widget style information

dev-qt/qt-docs

3d

Install documentation for dev-qt/qt3d

activeqt

Install documentation for ActiveQt (unpackaged, Windows-only)

assistant

Install documentation for dev-qt/assistant

bluetooth

Install documentation for dev-qt/qtbluetooth

charts

Install documentation for dev-qt/qtcharts

concurrent

Install documentation for dev-qt/qtconcurrent

connectivity

Install documentation for dev-qt/qtconnectivity

datavis

Install documentation for dev-qt/qtdatavis3d (unpackaged for Qt6)

declarative

Install documentation for dev-qt/qtdeclarative

designer

Install documentation for dev-qt/designer

gamepad

Install documentation for dev-qt/qtgamepad (available in qt overlay only)

graphicaleffects

Install documentation for dev-qt/qtgraphicaleffects

graphs

Install documentation for QtGraphs (unpackaged)

grpc

Install documentation for QtGRPC (unpackaged)

gui

Install documentation for dev-qt/qtgui

help

Install documentation for dev-qt/qthelp

html

Install documentation in HTML format

httpserver

Install documentation for QtHTTPServer (unpackaged)

imageformats

Install documentation for dev-qt/qtimageformats

linguist

Install documentation for dev-qt/linguist

location

Install documentation for dev-qt/qtlocation

lottie

Install documentation for QtLottie (unpackaged)

multimedia

Install documentation for dev-qt/qtmultimedia

network

Install documentation for dev-qt/qtnetwork

networkauth

Install documentation for dev-qt/qtnetworkauth

positioning

Install documentation for dev-qt/qtpositioning

printsupport

Install documentation for dev-qt/qtprintsupport

qch

Install documentation in QCH format

qdoc

Install documentation for dev-qt/qdoc

qt5compat

Install documentation for dev-qt/qt5compat

quick3d

Install documentation for dev-qt/qtquick3d

quick3dphysics

Install documentation for QtQuick3DPhysics (unpackaged)

quickcontrols

Install documentation for dev-qt/qtquickcontrols

quickcontrols2

Install documentation for dev-qt/qtquickcontrols2

quickeffectmaker

Install documentation for QtQuickEffectMaker (unpackaged)

remoteobjects

Install documentation for QtRemoteObjects (unpackaged)

script

Install documentation for dev-qt/qtscript

scxml

Install documentation for dev-qt/qtscxml

sensors

Install documentation for dev-qt/qtsensors

serialbus

Install documentation for dev-qt/qtserialbus (unpacakged for Qt6)

serialport

Install documentation for dev-qt/qtserialport

shadertools

Install documentation for dev-qt/qtshadertools

speech

Install documentation for dev-qt/qtspeech

sql

Install documentation for dev-qt/qtsql

svg

Install documentation for dev-qt/qtsvg

timeline

Install documentation for dev-qt/qtquicktimeline

tools

Install documentation for dev-qt/qttools

virtualkeyboard

Install documentation for dev-qt/qtvirtualkeyboard

wayland

Install documentation for dev-qt/qtwayland

webchannel

Install documentation for dev-qt/qtwebchannel

webengine

Install documentation for dev-qt/qtwebengine

websockets

Install documentation for dev-qt/qtwebsockets

webview

Install documentation for dev-qt/qtwebview (unpackaged for Qt6)

widgets

Install documentation for dev-qt/qtwidgets

x11extras

Install documentation for dev-qt/qtx11extras

xmlpatterns

Install documentation for dev-qt/qtxmlpatterns

dev-qt/qtgamepad

evdev

Enable support for input devices via evdev

qml

Build QML bindings

dev-qt/qtgui

eglfs

Build the EGL Full Screen/Single Surface platform plugin

evdev

Enable support for input devices via evdev

ibus

Build the IBus input method plugin

libinput

Enable support for input devices via dev-libs/libinput

linuxfb

Enable Linux framebuffer support for embedded devices

tslib

Enable support for touchscreen devices via x11-libs/tslib

tuio

Build plugin to receive touch events over the TUIO protocol

wayland

Provide dev-qt/qtwayland to ensure Qt applications can be run as Wayland clients

X

Build the XCB platform plugin and enable X11 integration

dev-qt/qthttpserver

websockets

Enable websockets support using dev-qt/qtwebsockets

dev-qt/qtmultimedia

eglfs

Enable screen capture support with Qt's EGL Full Screen/Single Surface platform plugin

gstreamer

Enable audio support via media-libs/gstreamer

qml

Build QML/QtQuick bindings and imports

widgets

Build the QtMultimediaWidgets module

dev-qt/qtnetwork

gssapi

Enable support for GSSAPI (virtual/krb5)

libproxy

Use net-libs/libproxy for automatic HTTP/SOCKS proxy configuration

dev-qt/qtpositioning

geoclue

Use enhanced location information from app-misc/geoclue

nmea

Build plugin for parsing NMEA (National Marine Electronics Association) sentences

qml

Build QML bindings

dev-qt/qtquickcontrols

widgets

Enable QtWidgets support

dev-qt/qtquickcontrols2

widgets

Enable QtWidgets support

dev-qt/qtremoteobjects

qml

Build QML/QtQuick bindings and imports

dev-qt/qtscript

scripttools

Build the QtScriptTools module (requires QtWidgets)

dev-qt/qtscxml

qml

Build QML/QtQuick bindings and imports

dev-qt/qtsensors

qml

Build QML bindings

dev-qt/qtspeech

flite

Enable text-to-speech synthesizer plugin using app-accessibility/flite engine

qml

Build QML/QtQuick bindings and imports

speechd

Enable text-to-speech synthesizer plugin using app-accessibility/speech-dispatcher engine

dev-qt/qttools

assistant

Build Qt Assistant and the QtHelp module

clang

Enable using libclang for code parsing (linguist/qdoc)

designer

Build Qt Designer

distancefieldgenerator

Build Qt Distance Field Generator

linguist

Build Qt Linguist (GUI requires USE=widgets)

pixeltool

Build Qt Pixeltool

qdbus

Build the Qt D-Bus Interface (D-Bus Viewer requires USE=widgets)

qdoc

Build Qt Documentation Generator

qml

Build QML/QtQuick bindings and imports

qmlls

Build the QtHelp plugin for the QML language server

qtattributionsscanner

Build Qt Source Code Attribution Scanner

qtdiag

Build Qt Diag

qtplugininfo

Build Qt Plugin Info

widgets

Enable QtWidgets support

dev-qt/qtvirtualkeyboard

handwriting

Adds handwriting recognition integration support

dev-qt/qtwayland

compositor

Enable support for the wayland compositor / server APIs

gnome

Build the GNOME-like decoration plugin (loaded by default with GNOME)

qml

Build QML/QtQuick bindings and imports

vulkan

Enable support for Vulkan-based server buffer integration

dev-qt/qtwebchannel

qml

Build QML/QtQuick bindings and imports

dev-qt/qtwebengine

designer

Install the QWebEngineView plugin used to add widgets in dev-qt/designer forms that display web pages.

jumbo-build

Combine source files to speed up build process.

pdfium

Build the QtPdf module based on chromium's PDFium library

qml

Build QML/QtQuick bindings and imports

system-icu

Use the system-wide dev-libs/icu instead of bundled.

webdriver

Build tool for automated testing (ChromeDriver equivalent)

widgets

Enable QtWidgets support

dev-qt/qtwebsockets

qml

Build QML bindings

dev-qt/qtwidgets

gtk

Build the GTK platform theme plugin

dev-qt/qtxmlpatterns

qml

Build the XmlListModel import for QtQuick (requires QtDeclarative)

dev-ruby/activesupport

msgpack

Support ActiveSupport::MessagePack module

dev-ruby/asciidoctor-diagram

barcode

Enable diagrams with dev-ruby/rqrcode and dev-ruby/barby

ditaa

Enable diagrams with media-gfx/ditaa

lilypond

Enable diagrams with media-sound/lilypond

meme

Enable diagrams with media-gfx/imagemagick

mscgen

Enable diagrams with media-gfx/mscgen

plantuml

Enable diagrams with media-gfx/plantuml

tikz

Enable diagrams with dev-tex/pgf

dev-ruby/barby

cairo

Add support for writing images (PNG, PS, EPS and, if supported, PDF and SVG) using dev-ruby/rcairo. Not available on JRuby.

png

Add support for writing PNG images using dev-ruby/chunky_png.

prawn

Add support for writing PDF documents using dev-ruby/prawn.

qrcode

Add support for QRCode 2D codes using dev-ruby/rqrcode.

rmagick

Add support for writing images (among others PNG, GIF and JPEG) using dev-ruby/rmagick. Not available on JRuby.

dev-ruby/faraday_middleware

mashify

Include FaradayMiddleware::Mashify

oauth

Include FaradayMiddleware::OAuth

parsexml

Include FaradayMiddleware::ParseXml

rashify

Include FaradayMiddleware::Rashify

dev-ruby/io-event

io-uring

Enable io_uring support, and use io_uring instead of epoll

dev-ruby/jwt

eddsa

Support EdDSA algorithm using dev-ruby/rbnacl

dev-ruby/maruku

highlight

Enable source code highlighting via dev-ruby/syntax

dev-ruby/mysql2

mariadb

Use mariadb bindings

dev-ruby/net-ssh

chacha20

Use dev-ruby/rbnacl for chacha20-poly1305@openssh.com support

ed25519

Use dev-ruby/ed25519 for Ed25519 support

dev-ruby/rrdtool-bindings

graph

Enable support for graphing functions

dev-ruby/rspec-core

highlight

Enable source code highlighting via dev-ruby/coderay

dev-ruby/rubygems

server

Install support for the rubygems server

dev-ruby/vcr

json

Add support for casettes serialized with JSON

dev-scheme/bigloo

avahi

Enable Avahi support

gpg

Enable GPG support

libuv

Enable libuv support

dev-scheme/gauche-gl

cg

Enable NVidia Cg binding

dev-scheme/guile

debug-freelist

Include garbage collector freelist debugging code

debug-malloc

Include malloc debugging code

deprecated

Enable deprecated features

discouraged

(implied by deprecated) enable merely discouraged features

networking

Include networking interfaces

regex

Include regular expression interfaces

dev-scheme/kawa

awt

Assume AWT is available

frontend

Build "kawa" front-end program using sys-libs/readline

jemacs

Build JEmacs

krl

Build BRL emulation and KRL

sax

Assume SAX2 is available with dev-java/sax

servlets

Build support for generating servlets with Java servletapi

swing

Assume Swing is available

dev-scheme/mit-scheme

blowfish

Compile with blowfish encryption support

dev-scheme/racket

chez

Build Racket on Chez (Racket CS)

futures

Enable racket/future library for fine-grained hardware parallelism

ncurses

Add ncurses support for expeditor (REPL expression editor)

places

Enable racket/place library for share-nothing parallelism and message-passing communication. Compared to futures, places are heavyweight, but they have a simpler performance model.

threads

Enable support for green threads

dev-scheme/scm

arrays

Support for arrays, uniform-arrays and uniform-vectors.

bignums

Support for large precision integers.

cautious

SCM will always check the number of arguments to interpreted closures.

dynamic-linking

Be able to load compiled files while running.

engineering-notation

Floats to display in engineering notation (exponents always multiples of 3) instead of scientific notation.

gsubr

generalized c arguments: for arbitrary (more then 11) arguments to C functions.

inexact

Support for floating point numbers.

ioext

Commonly available I/O extensions: line I/O, file positioning, file delete and rename, and directory functions.

libscm

Build and install libscm.a and related headers

macro

C level support for hygienic and referentially transparent macros (syntax-rules macros).

regex

String regular expression matching.

unix

Support for: nice, acct, lstat, readlink, symlink, mknod and sync.

dev-scheme/slib

gambit

Support for gambit scheme implementation

scm

Support for scm scheme implementation

dev-tcltk/expect-lite

debug

pull in packages needed for runtime interactive debugger

dev-tcltk/tcl3d

ode

Enable support for physics engine from dev-games/ode

osg

Enable support for 3D toolkit from dev-games/openscenegraph

dev-tcltk/tktreectrl

shellicon

shellicon extension

dev-tex/abntex

lyx

Install with app-office/lyx layout

dev-tex/biblatex

biber

Install the unicode compatible backend processor

dev-texlive/texlive-basic

luajittex

Add support for LuaJitTeX: LuaTeX based on LuaJIT which is usually faster.

dev-tex/pythontex

highlighting

Syntax highlighting using dev-python/pygments

dev-util/babeltrace

elfutils

Build the dev-util/lttng-ust debug information filter component class

plugins

Build support for Babeltrace 2 Python plugins

dev-util/bpftool

caps

Use sys-libs/libcap to enable unprivileged run support

clang

Use llvm-core/clang instead of sys-devel/bpf-toolchain for BPF CO-RE support

llvm

Use llvm-core/llvm instead of libbfd (sys-libs/binutils-libs) for JIT disassembly

dev-util/breakpad

tools

Build tools

dev-util/bugbite-cli

openssl

Use dev-libs/openssl as a crypto backend

dev-util/buildbot

docker

Add support for worker docker command steps

irc

Add support for status delivery through an ircbot.

dev-util/cargo-audit

fix

Add support for 'fix' subcommand (experimental)

dev-util/catalyst

iso

Pulls in the depends for building iso images

qcow2

Pulls in the depends for building qcow2 images

dev-util/ccache

redis

Enable Redis backend for storage via dev-libs/hiredis

static-c++

Avoid dynamic dependency on gcc's libstdc++.

dev-util/cccc

apidoc

Build software docs with doxygen/graphviz and metrics with cccc

mfc

Add patch for MFC dialect options

dev-util/codeblocks

contrib

Build additional contrib components

fortran

Build FortranProject plugin which enables to use Code::Blocks IDE for Fortran language

dev-util/cppcheck

charts

Enable QtCharts usage in the GUI

htmlreport

install cppcheck-htmlreport

dev-util/ctags

json

Enable JSON output support

xml

Enable XML parsing support

yaml

Enable YAML parsing support

dev-util/cwdiff

mercurial

install hg wdiff alias for dev-vcs/mercurial

dev-util/devhelp

gedit

Install plugin for app-editors/gedit

dev-util/dialog

minimal

Disable library, install command-line program only

dev-util/diffoscope

dev-util/dropwatch

bfd

Add support for Binary File Descriptor

dev-util/edi

clang

Provide integration with llvm-core/clang and dev-util/bear for autocompletion, inline errors and information about compilation units.

dev-util/flatpak-builder

yaml

Use libyaml for yaml support

dev-util/geany

vte

Enable Terminal support (x11-libs/vte)

dev-util/geany-plugins

ctags

Enable ctags plugin

debugger

Enable the debugger plugin which interfaces with dev-debug/gdb

enchant

Enable spell checking using enchant

gpg

Enable geanypg plugin which integrates GPG using app-crypt/gpgme

gtkspell

Use gtkspell for dictionary support in GeanyVC

markdown

Enable the markdown plugin

pretty-printer

Enable pretty-printer plugin

scope

Enable the scope plugin which is a graphical GDB front-end

webhelper

Enable webhelper plugin

workbench

Enable workbench plugin

dev-util/glade

gjs

Build catalog support for dev-libs/gjs widgets.

webkit

Build catalog support for net-libs/webkit-gtk:4 widgets.

dev-util/global

vim

Integrate the GNU GLOBAL source code tag system with Vim

dev-util/gnome-builder

clang

Provide integration with llvm-core/clang for best possible C/C++ autocompletion, semantic highlighting, symbol resolving, and diagnostics support

d-spy

Provide D-Bus debugging functionality via dev-debug/d-spy

flatpak

Enable support for flatpak applications using sys-apps/flatpak

git

Provide support for the Git version control system via dev-libs/libgit2-glib (such as setup of Git for New Project, direct cloning for Open Project and changed lines indicators in the editor gutter)

sysprof

Provide an integrated profiler via dev-util/sysprof

dev-util/google-perftools

debug

Build a set of libraries with debug support (so-called debugalloc). These are available by default but are not needed unless you're actually developing using tcmalloc.

minimal

Only build the tcmalloc_minimal library, ignoring the heap checker and the profilers.

optimisememory

To build libtcmalloc with smaller internal caches.

pagesize-128k

Use 128K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

pagesize-16k

Use 16K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

pagesize-256k

Use 256K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

pagesize-32k

Use 32K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

pagesize-64k

Use 64K page size for tcmalloc. Larger size makes tcmalloc faster, at the cost of using more space (due to internal fragmentation)

dev-util/heaptrack

gui

Install Qt5-based analyzer tool

dev-util/hfstospell

clang

Use different logic in ebuild when clang is used

dev-util/hip

hip

Build HIP runtime

opencl

Build OpenCL runtime

video_cards_amdgpu

Build for AMD platform

video_cards_nvidia

Build for Nvidia platform

dev-util/idea-community

experimental

Enables Wayland support preview.

dev-util/intel-graphics-compiler

vc

Enable VectorCompiler for a better performance.

dev-util/intel-graphics-system-controller

cli

Build CLI tools for flashing manually a firmware upgrade.

dev-util/kcov

binutils

Use sys-libs/binutils-libs for `--verify` support

dev-util/kdevelop

gdbui

Enable GUI for attaching GDB to a running process

qmake

Enable support for QMake build system

Enable support for patch sharing using kde-frameworks/purpose

dev-util/kernelshark

custom-optimization

Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS

dev-util/kup

gitolite

Enable support for dev-vcs/gitolite in kup-server

dev-util/libabigail

btf

Handle reading kernel debug files in BTF format via dev-libs/libbpf

dev-util/librnp

botan

Use Botan crypto backend instead of OpenSSL

dev-util/lttng-tools

ust

Support LTTng-UST (Userspace Tracing)

dev-util/lttng-ust

numa

Enable numa support

dev-util/massif-visualizer

callgraph

Enable detailed snapshot analysis using media-gfx/kgraphviewer

dev-util/mingw64-runtime

default-ucrt

Use ucrt instead of msvcrt-os as the default crt (WARNING: incompatible with each others and also for building Wine with USE=mingw, pick one from the start and keep it)

idl

Install idl files

libraries

Build extra libraries: mangle, pseh, winpthreads

tools

Build extra tools: gendef, genidl, widl

dev-util/mingw64-toolchain

bin-symlinks

Symlink executables to usr/bin to be in default PATH (conflicts with crossdev mingw, and crossdev is preferable for a fully featured toolchain)

dev-util/nvidia-cuda-toolkit

debugger

Install the CUDA debugger

nsight

Install profiling and optimizing tools (nsight-compute, nsight-systems)

profiler

Install the NVIDIA CUDA profiler (nvprof) and the related libraries

rdma

Enable infiniband support via sys-cluster/rdma-core

sanitizer

Install compute-sanitizer tool

vis-profiler

Install the NVIDIA CUDA visual profiler (nvvp)

dev-util/oprofile

apidoc

Provide doxygen generated API docs.

dev-util/ostree

archive

Use libarchive

dracut

Install dracut module

gpg

Enable GPG support

grub

Enable grub configuration generator

httpd

Enable ostree trivial-httpd entrypoint

libmount

Use libmount

sodium

Use libsodium for ed25519

soup

Use libsoup for networking

dev-util/perf

babeltrace

Enable dev-util/babeltrace support

bpf

Enable support for eBPF features with dev-libs/libbpf

capstone

Use dev-libs/capstone for disassembly support

doc

Build documentation and man pages. With this USE flag disabled, the --help parameter for perf and its sub-tools will not be available. This is optional because it depends on a few documentation handling tools that are not always welcome on user systems.

libpfm

Enable dev-libs/libpfm support

libtraceevent

Enable dev-libs/libtraceevent support

libtracefs

Enable dev-libs/libtracefs support

numa

Enable NUMA support

perl

Add support for Perl as a scripting language for perf tools.

systemtap

Add support to define SDT event in perf tools.

unwind

Use sys-libs/libunwind for frame unwinding support.

dev-util/pkgconf

native-symlinks

Install generic symlinks like pkgconf and pkg-config. If this flag is disabled, only CHOST-prefixed pkg-config executables will be available to end users and ebuilds.

dev-util/plan9port

freefonts

Don't install BigelowHolmes fonts

dev-util/poke

nbd

Enable poking at networked block devices via sys-libs/libnbd.

pvm-profiling

Enable profiling in the PVM

dev-util/pycharm-community

bundled-jdk

Use bundled jdk

dev-util/pycharm-professional

bundled-jdk

Use bundled jdk

bundled-xvfb

Use bundled Xvfb

dev-util/ropper

z3

Enable Z3 contraint solver support

dev-util/scanmem

gui

Enable the GameConqueror GUI

dev-util/sccache

azure

Enable Azure Blob Storage support

dist-client

Enables distributed support in the sccache client

dist-server

Enables the sccache-dist binary

gcs

Enable Google Cloud Storage support

redis

Enable Redis support

s3

Enable full Amazon S3 support

webdav

Enable WebDAV storage endpoint support

dev-util/schroot

btrfs

Enable support for chroots using btrfs snapshots

dchroot

Enables the building of a wrapper named "dchroot", replacing sys-apps/dchroot

lvm

Enable support for chroots using LVM snapshots

zfs

Enable support for chroots using ZFS shapshots/clones

dev-util/sdl-jstest

sdl

Enable media-libs/libsdl2 based input test

sdl1

Enable media-libs/libsdl based input test

dev-util/selenium-manager

telemetry

Disable sending telemetry by default (avoid-stats config option).

dev-util/sysprof

unwind

Use sys-libs/libunwind to unwind the stack

dev-util/Tensile

client

Build and install tensile_client executable to run benchmarks and tune GPU GEMM

dev-util/uftrace

capstone

Use capstone to provide dynamic tracing without recompilation

dev-util/vulkan-tools

cube

Build the cube/cubepp demos

dev-util/watchman

python

Install pywatchman bindings and the watchman-{wait,make} utils

dev-vcs/cvs

server

Enable server support

dev-vcs/darcs

curl

Use libcurl for HTTP support.

terminfo

Use the terminfo package for enhanced console support.

threaded

Use threading and SMP support.

dev-vcs/fossil

fusefs

Enable the Fuse Filesystem

json

Enable the JSON API of Fossil's wiki

system-sqlite

Use the system SQLite instead of the bundled one

tcl-private-stubs

Enable Tcl integration via private stubs mechanism

tcl-stubs

Enable Tcl integration via stubs library mechanism

th1-docs

Enable TH1 for embedded documentation pages

th1-hooks

Enable TH1 hooks for commands and web pages

dev-vcs/git

blksha1

Use the new optimized SHA1 implementation

cgi

Install gitweb too

curl

Support fetching and pushing (requires webdav too) over http:// and https:// protocols

gpg

Pull in gnupg for signing -- without gnupg, attempts at signing will fail at runtime!

highlight

GitWeb support for app-text/highlight

mediawiki

Support pulling and pushing from MediaWiki

perforce

Add support for Perforce version control system (requires manual installation of Perforce client)

safe-directory

Respect the safe.directory setting

subversion

Include git-svn for dev-vcs/subversion support

tk

Include the 'gitk' and 'git gui' tools

webdav

Adds support for push'ing to HTTP/HTTPS repositories via DAV

dev-vcs/git-annex

assistant

Enable git-annex assistant and watch command

benchmark

Enable benchmarking

dbus

Enable dbus support

gitlfs

Build with git-lfs library (rather than vendored copy)

magicmime

Use libmagic to determine file MIME types

pairing

Enable pairing

torrentparser

Use haskell torrent library to parse torrent files

webapp

Enable git-annex webapp

dev-vcs/git-delete-merged-branches

full-name-executable

Install executable /usr/bin/git-delete-merged-branches that is in conflict with dev-vcs/git-extras

dev-vcs/gitg

glade

Install a glade catalog file

python

Install Python bindings for those plugins requiring it.

dev-vcs/gitolite

tools

Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible

dev-vcs/gitolite-gentoo

tools

Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible

dev-vcs/mercurial

chg

Support Mercurial command server client

gpg

Support signing with GnuPG.

rust

Use Rust extensions.

tk

Install dev-lang/tk for hgk script.

dev-vcs/subversion

extras

Install extra scripts (examples, tools, hooks)

kwallet

Enable encrypted storage of passwords with kde-frameworks/kwallet

plaintext-password-storage

Enable on-disk caching of plaintext passwords and passphrases. (Enabling this functionality will not force Subversion to store passwords in plaintext, but does permit users to explicitly allow that behavior via runtime configuration.)

games-action/beathazardultra

bundled-libs

Use the upstream provided bundled libraries.

games-action/descent1-freedata

l10n_de

Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign

opl3-musicpack

Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip

sc55-musicpack

Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module

textures

Include high resolution (640x480) backgrounds, briefing images and fonts (Descent 1)

games-action/descent2-freedata

l10n_de

Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign

opl3-musicpack

Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip

sc55-musicpack

Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module

games-action/dxx-rebirth

d1x

Install Descent 1 resources and executable

d2x

Install Descent 2 resources and executable

data

Ensure some game levels are present; if the full game's level data is not already installed then install the playable demo data (i.e. shareware levels)

debug

Enable various debugging code paths and sanity checks, not just output. Some of these checks date back to the retail build, and choke on some custom levels because the game was never coded to sufficiently distrust inputs

editor

Enable level editor support

l10n_de

Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign

midi

Enforce that SDL-mixer is used and has midi support

music

Enable music support

opl3-musicpack

Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip

sc55-musicpack

Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module

sdl2

Use libSDL2, SDL2-mixer instead of libSDL-1* and SDL-mixer-1*

tracker

Enable support for the PHP-based multiplayer game tracker

games-action/hotline-miami

bundled-libs

Use bundled libraries.

launcher

Install qt launcher

games-action/prismlauncher

qt6

Build with Qt6 support instead of the default Qt5

games-action/supermariowar

server

Compile and install Super Mario War server files

games-action/supertuxkart

nettle

Use dev-libs/nettle crypto backend

recorder

Enable recording with media-libs/libopenglrecorder

sqlite

Record IP bans, statistics in server mode with dev-db/sqlite

wiimote

Support for wiimote input devices

games-action/swordandsworcery

bundled-libs

Use the upstream provided bundled libraries.

games-action/trine

launcher

Install GTK+ launcher

games-action/trine2

launcher

Install GTK+ launcher

games-action/trine-enchanted-edition

launcher

Install GTK+ launcher

games-arcade/bomns

editor

enables building the level editor

games-arcade/commandergenius

downloader

Allows some Keen games to be downloaded from the menu

games-arcade/jazz2

sdl

Prefer SDL2 over GLFW backend

games-arcade/jazz2-data

cc

Install The Christmas Chronicles additional data

demo

Use the free demo data instead of the full retail game data

games-arcade/lbreakout2

themes

Install additional themes

games-arcade/moleinvasion

music

Download and install the music files

games-arcade/oshu

osu-skin

Include more complete osu-skin (other is minimal)

games-arcade/osu-lazer

pipewire

Use pipewire to enable sound output

games-arcade/performous

midi

Enable MIDI I/O support

songs

Install a few demo songs

webcam

Enable Webcam support

games-arcade/tuxanci

physfs

Use dev-games/physfs instead of dev-libs/libzip to load compressed data

games-board/cockatrice

client

Build with client

oracle

Build with oracle

server

Compile server support

games-board/crafty

no-opts

Don't try to enable crazy CFLAG options

games-board/freedoko

backgrounds

Install additional background images

gnomecards

Install the gnome-games card set

kdecards

Install the KDE card set

openclipartcards

Install the openclipartcards card set

pysolcards

Install the PySol card set

xskatcards

Install the XSkat card set

games-board/pasang-emas

extras

Install some extra themes

games-board/pioneers

help

Enable gnome ingame help via scrollkeeper

games-board/pysolfc

extra-cardsets

Install extra cardsets

sound

Enable sound support using dev-python/pygame

games-board/scid

photos

Install collection of player photos (large)

scripts

Install additional python and tcl utility scripts

games-board/stockfish

general-32

Generic unoptimized 32-bits build

general-64

Generic unoptimized 64-bits build

optimize

Enable upstream -O3 optimizations (default enabled)

games-board/tablebase-syzygy

6-pieces

Install tablebases for 6 pieces (huge!)

games-board/xboard

default-font

Install the default font that xboard uses

zippy

Enable experimental zippy client

games-emulation/atari800

encode-mp3

Support recording sound in MP3 format

games-emulation/bsnes-jg

jgmodule

Build module for The Jolly Good API

shared

Build shared library

games-emulation/desmume

gdb

Enable support for the remote GDB stub

openal

Use media-libs/openal for microphone input

wifi

Enable support for Wi-Fi (experimental and discouraged)

games-emulation/dolphin

discord-presence

Enables Discord Rich Presence, show the current game on Discord

evdev

Enable evdev input support

llvm

Enables LLVM support, for disassembly

log

Increase logging output

mgba

Enables GBA controllers emulation using libmgba.

games-emulation/dosbox

core-inline

Enable memory-increasing inlines for better performance but requiring more build time

glide

Enable unofficial Glide emulation via media-libs/openglide

games-emulation/dosbox-staging

dynrec

Use recompiling cpu core instead of dynamic x86/x64 specific cpu core

fluidsynth

use media-sound/fluidsynth for MIDI emulation

mt-32

use media-libs/munt-mt32emu for MT-32 emulation

network

Enable networking features (modem, ipx)

slirp

Enable Ethernet emulation using net-libs/libslirp

games-emulation/fceux

archive

Use app-arch/libarchive for 7zip support

ffmpeg

Use media-video/ffmpeg for video recording

x265

Use media-libs/x265 for video recording (HEVC)

games-emulation/gambatte-jg

jgmodule

Build module for The Jolly Good API

shared

Build shared library

games-emulation/generator

sdlaudio

Enable SDL Audio

games-emulation/hatari

capsimage

Use dev-libs/spsdeclib to read .IPF, .RAW, and .CTR disk images

capstone

Use dev-libs/capstone for disassembly output in the debugger

portmidi

Use media-libs/portmidi as an alternative MIDI backend

games-emulation/higan

gtk

Use GTK3 (Qt5 if disabled) user interface backend

games-emulation/jgemu

bsnes

Install bsnes for Super Nintendo

cega

Install Cega for SG-1000, Sega Master System and Game Gear

gambatte

Install Gambatte for Game Boy and Game Boy Color

geolith

Install Geolith for Neo Geo AES/MVS

jollycv

Install JollyCV for ColecoVision

mednafen

Install Mednafen for Atari Lynx, Nintendo Virtual Boy, NEC PC Engine, NEC SuperGrafx, Sony PlayStation, Sega Saturn, Super Nintendo, Neo Geo Pocket and WonderSwan

melonds

Install MelonDS for Nintendo DS

mgba

Install mGBA for Game Boy Advance

nestopia

Install Nestopia for Nintendo Entertainment System

prosystem

Install ProSystem for Atari 7800

sameboy

Install SameBoy for Game Boy and Game Boy Color

vecx

Install Vecx for Vectrex

games-emulation/m64py

7z

Ensure support for .7z archives.

rar

Ensure support for .rar archives.

games-emulation/mgba

discord

Enable Discord RPC support

elf

Enable the use of elf utils via dev-libs/elfutils

gles3

Build OpenGL ES 3.x RenderSystem

libretro

Build libretro port

games-emulation/mupen64plus

audio-sdl

Enable SDL audio plugin.

input-sdl

Enable SDL input plugin.

rsp-hle

Enable HLE RSP plugin.

ui-console

Enable default console UI.

ui-m64py

Enable PyQt5 UI using games-emulation/m64py.

video-glide64mk2

Enable Glide64mk2 video plugin.

video-rice

Enable Rice video plugin.

games-emulation/mupen64plus-core

debugger

Build the debugger

netplay

Enable netplay functionality

new-dynarec

Enable new experimental dynamic recompiler implementation (only for x86 and arm)

opencv

Support video capture via media-libs/opencv

osd

Overlay emulator messages using on-screen-display

games-emulation/mupen64plus-video-glide64mk2

hires

Support hi-resolution textures (requires dev-libs/boost)

games-emulation/pcsx2

clang

Use Clang compiler to build (the only compiler that is currently supported by upstream on Linux, do not report bugs if force-disabled)

sndio

Enable support for the media-sound/sndio backend

games-emulation/ppsspp

discord

Enable interfacing with a locally running Discord desktop client

games-emulation/rmg

angrylion-plugin

Enable the mupen64plus-video-angrylion-plus XMAME licensed plugin

discord

Enable Discord RPC support

dynarec

Enable the new dynarec for the mupen64plus-core plugin

rust-plugin

Enable the mupen64plus-input-gca rust plugin

games-emulation/snes9x

libretro

Build libretro port

netplay

Enable playing ROMs over the network (not recommended)

games-emulation/vbam

link

Enable GBA linking functionality

games-engines/devilutionx

sodium

Enable network packet encryption using dev-libs/libsodium

zerotier

Enable ZeroTier for online public games

games-engines/exult

fluidsynth

Compile with support for FluidSynth

tools

Enable tools, usercode compiler and mods support

games-engines/fheroes2

tools

Install development tools like 82m2wav and xmi2midi.

games-engines/frobtads

tads2compiler

Build TADS2 compiler

tads3compiler

Build TADS3 compiler

games-engines/love

gme

Use media-libs/game-music-emu to support additional music formats

games-engines/minetest

client

Build Minetest client

leveldb

Enable LevelDB backend

prometheus

Enable prometheus client support

redis

Enable redis backend via dev-libs/hiredis

server

Build Minetest server

spatial

Enable SpatialIndex AreaStore backend

games-engines/odamex

client

Build client target

hidpi

Use bundled FLTK 1.4, which has better support for HiDPI screens

master

Build master server target (advertises odamex server list)

odalaunch

Build the wxWidgets based launcher

portmidi

Enable PortMidi support

server

Build server target

games-engines/openmw

devtools

Install development tools like bsatool, esmtool and opencs.

osg-fork

Use OpenSceneGraph forked by OpenMW instead of upstream OSG.

games-engines/scummvm

fluidsynth

compile with support for fluidsynth

fribidi

Support for right-to-left languages via dev-libs/fribidi

mpeg2

enable mpeg2 codec for cutscenes

net

enable cloud support via media-libs/sdl2-net

openmpt

Enable mod/tracker music file support via media-libs/libopenmpt

parport

Enable parallel port support via sys-libs/libieee1284

sndio

Enable support for MIDI music using media-sound/sndio

unsupported

enable unsupported and/or broken game engines (you're on your own)

vpx

Enable VP8/VP9 codec support via media-libs/libvpx

games-engines/scummvm-tools

tremor

Enable tremor, a fixed-point version of the Ogg Vorbis decoder

games-engines/solarus

doc

Install doxygen developer documentation.

games-fps/alienarena

vidmode

Link against x11-libs/libXxf86vm. Required for full-screen support.

games-fps/chocolate-doom

midi

basic support for MIDI files

games-fps/darkplaces

cdsound

Enables using CD audio in the engine

demo

Uses the demo data from quake1 (quake1-demodata)

lights

Install and setup the updated light maps

textures

Install and setup the updated textures

games-fps/doomsday

demo

Install launcher dor doom1.wad from games-fps/doom-data

display-mode

Include the ability to set the display mode

fluidsynth

Build the FluidSynth sound driver

freedoom

Install launcher for doom1.wad from games-fps/freedoom

tools

Build additional tools such as doomsday-shell, md2tool and texc

games-fps/duke3d-data

demo

Extract data files from the shareware version.

gog

Extract data files from the GOG.com version.

games-fps/eduke32

duke3d

Install the Duke Nukem 3D data files, provided by games-fps/duke3d-data.

fluidsynth

Install media-libs/sdl2-mixer with fluidsynth support.

hrp

Install the Duke Nukem 3D High Resolution Pack.

offensive

Install the Duke Nukem 3D XXX Pack.

opl

Install the Duke Nukem 3D OPL music files.

psx

Install the Duke Nukem 3D PSX high resolution voice files.

sc-55

Install the Duke Nukem 3D Roland SC-55 music files.

sdk

Install the SDK files.

server

Enable support for multiplayer.

tools

Install the support tools for mapster32.

voidsw

Enable support for Shadow Warrior (Classic) through VoidSW.

voxels

Install the Duke Nukem 3D Voxels Pack.

vpx

Enable support for media-libs/libvpx.

xmp

Enable support for media-libs/exempi.

games-fps/gzdoom

non-free

Enable non-free components

swr

Enable software renderer

games-fps/nexuiz

maps

Install the community map pack

games-fps/prboom-plus

dumb

Enable support for various tracker-style music formats via media-libs/dumb

fluidsynth

Enable support for MIDI via media-sound/fluidsynth

net

Enable support for network play

portmidi

Enable support for MIDI via media-libs/portmidi

sdl2-image

Enable support for high-resolution texture support via media-libs/sdl2-image

sdl2-mixer

Enable support for MIDI via media-libs/sdl2-mixer

server

Build PrBoom-Plus server

games-fps/quake2-icculus

demo

Install the demo files (quake2-demodata) and configure for use

qmax

Build the pretty version (quake max)

rogue

Build support for the 'Ground Zero' Mission Pack (rogue)

xatrix

Build support for the 'The Reckoning' Mission Pack (xatrix)

games-fps/quakeforge

client

Build Normal and QuakeWorld clients alongside the servers

wildmidi

Use media-sound/wildmidi for midi support

games-fps/redeclipse

dedicated

Install only as a dedicated game server

games-fps/rott

demo

Install the shareware version

games-fps/sauerbraten

server

Compile server support

games-fps/serioussam

alsa

Enable support ALSA sound.

pipewire

Enable support for pipewire.

vulkan

Enable support Vulkan render.

games-fps/turtlearena

mumble

Adds player-location (positional audio) support to VoIP

server

Build server target

voice

Adds VoIP support

games-fps/urbanterror

altgamma

Alternative way for gamma setting with modesetting driver

client

Build binary for client (includes code for non-dedicated server)

mumble

Use Mumble for ingame VoIP (experimental)

server

Build binary for dedicated server

skeetshootmod

Build support for skeetshoot mod for specific maps

voip

Use ioq3 ingame VoIP (experimental)

games-fps/worldofpadman

maps

Install extra maps (PadPack)

games-fps/xonotic

ode

Enable support for physics engine from dev-games/ode

games-fps/yamagi-quake2

client

Build client

ctf

Build support for the 'Capture The Flag' addon

gles

Build GLES3 renderer

rogue

Build support for the 'Ground Zero' Mission Pack

softrender

Build software renderer

vulkan

Build experimental Vulkan renderer

xatrix

Build support for the 'The Reckoning' Mission Pack

games-kids/gcompris

kiosk

Enable kiosk mode by default (for use by small children or on a self-service host machine)

games-misc/ponysay

fish-completion

Enable fish completion support

non-free

Install non-free ponies (i.e. from the MLP franchise)

games-misc/xcowsay

fortune

Enable support for fortune cookies via games-misc/fortune-mod

games-mud/tf

atcp

enable ATCP support.

gmcp

enable GMCP support.

option102

enable telnet option 102 support.

games-puzzle/gnome-tetravex

cli

Build the gnome-tetravex-cli command-line interface

gui

Build the gnome-tetravex graphical Gtk user interface

games-puzzle/nightsky

bundled-libs

Use the upstream provided bundled libraries.

games-puzzle/pingus

music

Enable playing of background music

games-puzzle/tiny-and-big

bundled-libs

Use the upstream provided bundled libraries.

games-puzzle/world-of-goo-gog

bundled-libs

Use bundled libs

games-puzzle/world-of-goo-hb

bundled-libs

Use bundled libs

games-roguelike/angband

sound

Enable and install sounds

games-roguelike/FTL

bundled-libs

Use bundled libraries.

games-roguelike/stone-soup

advpng

Use alternate png optimization.

ncurses

Enable for console (uses ncurses) based build. (can be enabled on top of tiles)

tiles

Enable for graphical (tiled) build. (can be enabled on top of ncurses)

games-roguelike/tomenet

client

Compile client

server

Compile server

games-rpg/daimonin-client

music

Install extra music

games-rpg/deponia-doomsday

bonus

Install the bonus content (Art Book, Concept Art, Soundtrack)

games-rpg/drascula

sound

Install optional audio files

games-rpg/dreamweb

doc

High-resolution scans of the written material in the original UK game box

games-rpg/freedroidrpg

devtools

Compile the additional dev tools

profile

Enable the integration of the ingame real-time profiler

games-rpg/hatoful-boyfriend

gui

Install the GUI for configuring screen resolution and input

games-rpg/hatoful-boyfriend-holiday-star

gui

Install the GUI for configuring screen resolution and input

games-rpg/kqlives

cheats

Enable cheating mode

games-rpg/manaplus

mumble

Enable support for voice chat

pugixml

Use dev-libs/pugixml for XML parsing isntead of dev-libs/libxml2

sdl2

Use libsdl2 instead of libsdl

games-rpg/the-longest-journey

hd

Install high definition backgrounds and sprites

hd-fmv

Install upscaled full motion videos

games-rpg/to-the-moon

bundled-libs

Use bundled libraries

games-simulation/corsix-th

midi

Adds support for background MIDI music via SDL_mixer

tools

Build tools for decoding RNC files

games-simulation/flightgear

dbus

Enable screensaver DBus interaction

gdal

Enable alternative terrain engine based on pagedLOD using sci-libs/gdal

qt5

Build Qt5 launcher application

udev

Enable event-based Input devices through virtual/udev

utils

Build various utilities (fgpanel, fgviewer among others)

games-simulation/openrct2

scripting

Enable the dev-lang/duktape scripting engine for executing user scripts.

games-simulation/openttd

allegro

Add support for Allegro

dedicated

Build only the openttd server, and not the client.

fluidsynth

Compile with support for FluidSynth

lzo

Enables LZO compression for savegames. This is only needed to load extremely old savegames. (versions before 0.2)

openmedia

Enables the free open media sets: OpenGFX, OpenSFX, OpenMSX, removing the requirement for proprietary TTD assets to play OpenTTD.

games-simulation/simutrans

midi

support for background MIDI music via media-sound/fluidsynth

minimal

Don't install any PakSets (scenario data)

games-simulation/simutrans-paksets

128

Install higher resolution scenario data (128 px graphics)

comic192

Install comic-like scenario data (192 px graphics)

cs128

Install Czech-Slovak scenario data (128 px graphics)

excentrique48

Install eccentric scenario data (48 px graphics)

german128

Install German scenario data (128 px graphics)

nippon64

Install Nippon scenario data (64 px graphics)

games-simulation/train-valley

gui

Install the GUI for configuring screen resolution and input

games-sports/speed-dreams

osggraph

Enable the new work-in-progress 3D engine using dev-games/openscenegraph

webstats

Enable support for sending racing statistics to a web server (experimental)

games-sports/xmoto

double-precision

more precise calculations at the expense of speed

games-strategy/0ad

editor

Include Atlas scenario editor projects

lobby

Enable the use of net-libs/gloox and the multiplayer lobby

nvtt

Support for some uncompressed data formats (might be needed for some mods)

games-strategy/colobot

devbuild

TODO

tools

Build tools

games-strategy/colobot-data

music

Enable music support

games-strategy/freeciv

gtk3

Build the gtk3 client

gtk4

Build the gtk4 client

json

Add support for JSON via dev-libs/jansson

mapimg

Additional mag image toolkit via media-gfx/imagemagick

modpack

Build the freeciv-modpack-program to download/install mods

rule-editor

Build ruleset editor

server

Enable server support. Disabling this will also make it impossible to start local games.

sound

Add support for sound provided by media-libs/sdl-mixer

system-lua

Use dev-lang/lua instead of the bundled liblua

web-server

Build the freeciv-web server in place of the freeciv server

games-strategy/freeorion

client

Build game client

games-strategy/freesynd

devtools

Build development tools

games-strategy/hedgewars

server

Enable local server

games-strategy/ja2-stracciatella

editor

Adds necessary file to run the editor

ru-gold

Support for russian gold ja2 version

games-strategy/megaglest

editor

Build map editor

fribidi

Enable FriBIDi support

model-viewer

Build model viewer

streflop

Use the library streflop. Out of synchs may occur if not enabled.

tools

Build model import/export tools

unicode

Use unicode strings for wxwidgets

wxuniversal

Use the wxUniversal port which implements the various GUI controls by drawing them itself

games-strategy/satellite-reign

gui

Install the GUI for configuring screen resolution and input

games-strategy/ufoai

client

Build the main game client

server

Build the dedicated server

games-strategy/uqm

music

download and install original 3DO music files

remix

download and install remixed music files (large)

voice

download and install voice files (large)

games-strategy/wargus

bne

Support extracting data from the Battle.net Edition

games-strategy/warzone2100

discord

Enable Discord presence/join integration

games-strategy/wesnoth

server

Enable compilation of server

games-util/gslist

web

Enable the web interface

games-util/heroic-bin

gamescope

Run Heroic Launcher inside gamescope

games-util/lgogdownloader

gui

Enable GUI login support for passing reCAPTCHA

games-util/sc-controller

trayicon

Enable system tray icon

games-util/slade

fluidsynth

Enable MIDI software synthesis using media-sound/fluidsynth

games-util/wit

fuse

Enable image mount support via fuse

gnome-base/gdm

bluetooth-sound

Allow loading of bluetooth sound modules. This may be necessary for accessibility screen readers, but may cause bluetooth sound issues for users logging in.

fprint

Enables experimental fingerprint authentication using sys-auth/fprintd

plymouth

Enable support for smooth transition from sys-boot/plymouth

gnome-base/gnome

classic

Install gnome-extra/gnome-shell-extensions for the Gnome Shell Classic mode

extras

Install additional GNOME applications

gnome-base/gnome-applets

tracker

Build the tracker search bar applet

gnome-base/gnome-control-center

gnome-online-accounts

Enable configuration panel for net-libs/gnome-online-accounts accounts

ibus

Enable support for enhanced input methods through app-i18n/ibus

gnome-base/gnome-extra-apps

games

Install Gnome Games

Install the gnome-extra/gnome-user-share personal file sharing tool

shotwell

Install the media-gfx/shotwell photo manager

tracker

Install the app-misc/tracker indexer and the GNOME packages that require it

gnome-base/gnome-keyring

ssh-agent

Use GNOME Keyring to unlock SSH keys. Recommended unless you are using ECDSA or Ed25519 keys.

gnome-base/gnome-light

gnome-shell

Install gnome-base/gnome-shell and x11-wm/mutter for the standard GNOME 3 desktop mode

gnome-base/gnome-session

elogind

Support sys-auth/elogind for session tracking

gnome-base/gnome-settings-daemon

elogind

Rely on sys-auth/elogind as runtime logind provider

modemmanager

Enable WWAN support via net-misc/modemmanager

systemd

Rely on sys-apps/systemd as runtime logind provider

gnome-base/gnome-shell

elogind

Use sys-auth/elogind for session tracking and suspend support.

ibus

Enable support for enhanced input methods through app-i18n/ibus

pipewire

Use pipewire to enable the camera monitor

gnome-base/gvfs

afp

Enables support for accessing AFP (Apple Filing Protocol) network shares

archive

Enables support for accessing files in archives transparently via app-arch/libarchive

bluray

Enable playback of Blu-ray filesystems using media-libs/libbluray

elogind

Use sys-auth/elogind for session tracking.

fuse

Enables fuse mount points in $HOME/.gvfs for legacy application access

gnome-online-accounts

Enable configuration panel for net-libs/gnome-online-accounts accounts

google

Enables support for accessing Google accounts via dev-libs/libgdata

http

Enable the HTTP/DAV backend using net-libs/libsoup

nfs

Enable NFS client support via net-fs/libnfs.

udev

Enable udev base replacement code for cdda feature

gnome-base/libgnomecanvas

glade

Enable glade support

gnome-base/librsvg

tools

Build svg viewer tool

gnome-base/nautilus

cloudproviders

Enable the cloudproviders support

gstreamer

Enable the Audio/Video file properties page

previewer

Use gnome-extra/sushi to preview files from the file mananger

sendto

Enable the nautilus-sendto extension to send files to various locations/devices

gnome-extra/cinnamon

internal-polkit

Use Cinnamon's internal polkit agent instead of gnome-extra/polkit-gnome. This does not currently support multi-user fast switching.

gnome-extra/cinnamon-control-center

modemmanager

Enable support for mobile broadband devices using net-misc/modemmanager

gnome-extra/cjs

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

gnome-extra/eiciel

nautilus

Build gnome-base/nautilus extension

gnome-extra/evolution-data-server

berkdb

sys-libs/db support needed to migrate old (pre-3.13 evolution versions) addressbook data

gnome-online-accounts

Enable net-libs/gnome-online-accounts based Google authentication support

oauth-gtk3

Enable internal OAuth2 authentication for GTK+3 applications (libedataserverui-*.so) support for Google and Outlook.com. If gnome-online-accounts is enabled and used, this is not necessary, but both can be supported at the same time with different setup at runtime

oauth-gtk4

Enable internal OAuth2 authentication for GTK 4 applications (libedataserverui4-*.so) support for Google and Outlook.com. If gnome-online-accounts is enabled and used, this is not necessary, but both can be supported at the same time with different setup at runtime

sound

Sound notification support through media-libs/libcanberra-gtk3 (does nothing without USE=gtk)

weather

Enable optional weather calendar support

gnome-extra/gnome-commander

gsf

Add metadata support for OLE, OLE2 and ODF

pdf

Add metadata support for PDF

taglib

Add metadata support for ID3, Vorbis, FLAC and APE

gnome-extra/gnome-contacts

gnome-online-accounts

Enable net-libs/gnome-online-accounts based Google authentication support

gnome-extra/gnome-network-displays

firewalld

Install firewalld zones

gnome-extra/gnome-shell-extension-gsconnect

nautilus

Install Nautilus extension for sending files via GSConnect

gnome-extra/gnome-software

firmware

Enable firmware update support through sys-apps/fwupd

flatpak

Enable support for flatpak applications using sys-apps/flatpak

snap

Enable support for snap packages using app-containers/snapd

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

gnome-extra/gnome-system-monitor

systemd

Display sys-apps/systemd metadata, e.g. unit names, for running processes

gnome-extra/libgda

canvas

Enable support for x11-libs/goocanvas

http

Enable embedded net-libs/libsoup based server

json

Enable support for JSON format

mdb

Enable support for Microsoft Access database using app-office/mdbtools

sourceview

Enable support for x11-libs/gtksourceview

gnome-extra/libgsf

gtk

Enable use of gdk in thumbnailer

gnome-extra/nemo

tracker

Add support for app-misc/tracker search

gnome-extra/nm-applet

modemmanager

Enable support for mobile broadband devices using net-misc/modemmanager

teamd

Enable teamd configuration editor

gnustep-apps/gemas

projectcenter

Build and install plugin for gnustep-apps/projectcenter

gnustep-apps/gworkspace

gwmetadata

Enable the metadata indexing and searching system

gnustep-apps/sogo

activesync

Build the ActiveSync support code

sodium

Enable support for Argon2 password schemes using dev-libs/libsodium

gnustep-base/gnustep-back-art

xim

Enable X11 XiM input method

gnustep-base/gnustep-back-cairo

xim

Enable X11 XiM input method

gnustep-base/gnustep-back-xlib

xim

Enable X11 XiM input method

gnustep-base/gnustep-make

libobjc2

Enables use of the GNUstep Objective-C runtime (gnustep-base/libobjc2) with non-fragile ABI and llvm-core/clang compiler

native-exceptions

Enables use of the native Objective-C exception support (@try/@catch/@finally) built-in objective-c exceptions with compilers that support it

gui-apps/foot

grapheme-clustering

Enable grapheme clustering support

gui-apps/grim

jpeg

Enable JPEG support.

gui-apps/gtkgreet

layershell

Enable layer shell support

gui-apps/kanshi

varlink

Enable remote control with varlink

gui-apps/mako

icons

Enable support for icons

gui-apps/swaybg

gdk-pixbuf

Support image types other than PNG

gui-apps/swayidle

elogind

Enable support for rootless session via elogind

gui-apps/swaylock

gdk-pixbuf

Enable additional image format support via the x11-libs/gdk-pixbuf library

gui-apps/waybar

evdev

Enable libevdev support for evdev related features

experimental

Enable experimental features, such as Bluetooth battery reporting

libinput

Enable libinput support for libinput related features

logind

Enable support for logind (bluetooth and idle inhibit)

mpd

Enable support for the Music Player Daemon

mpris

Enable support for mpris

network

Enable libnl support for network related features

pipewire

Enable support for pipewire

pulseaudio

Enable support for volume control via PulseAudio

sndio

Enable support for volume control via sndio

tray

Enable support for tray

wifi

Enable support for wifi/rfkill

gui-apps/waypipe

dmabuf

Use DMABUFs for data exchange and hardware decoding

ffmpeg

Link with ffmpeg to allow buffer displays using video streams

systemtap

Enable SystemTap/DTrace tracing

gui-apps/wayvnc

gbm

enable GPU-side screencopy (experimental)

tracing

Trace kernel and memory calls

gui-apps/wf-recorder

pipewire

Enable support for audio capture via media-video/pipewire.

pulseaudio

Enable support for audio capture via PulseAudio

gui-libs/gtk

broadway

Enable the GDK Broadway backend.

cloudproviders

Enable GtkPlacesSidebar to access cloud services

colord

Use x11-misc/colord for color management in printing

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

gui-libs/gtksourceview

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

gui-libs/libdecor

dbus

Enable dbus to query current cursor theme

examples

Build and install examples

gtk

Build GTK plugin

gui-libs/libhandy

glade

Install module and catalog for dev-util/glade

gui-libs/neatvnc

examples

Build and install examples

gbm

Enable support for the Generic Buffer Manager (gbm)

h264

Enable H.264 encoding

jpeg

Enable JPEG compression

tracing

Trace kernel and memory calls

websockets

Enable websockets support

gui-libs/vte

icu

Enable legacy charset support using dev-libs/icu

systemd

Support moving terminal child processes to their own systemd user scopes to avoid terminal getting killed due to child causing OOM

gui-libs/vte-common

systemd

Support moving terminal child processes to their own systemd user scopes to avoid terminal getting killed due to child causing OOM

gui-libs/wlroots

drm

Enable Direct Rendering Management

libinput

Enable support for input devices via dev-libs/libinput

liftoff

Enable support for libliftoff KMS plane backend

session

Enable session support (is required for DRM and libinput)

X

Enable support for X11 applications (XWayland)

x11-backend

Enable support for handling input/output devices through x11-libs/libxcb

xcb-errors

Better error reporting when using xwayland

gui-libs/xdg-desktop-portal-wlr

elogind

Enable support for rootless session via elogind

gui-wm/gamescope

libei

Enable emulated input using dev-libs/libei

pipewire

Enable screen capture via PipeWire

wsi-layer

Enable the WSI layer (required for HDR)

gui-wm/hyprland

legacy-renderer

Enable legacy renderer

gui-wm/sway

swaybar

Install 'swaybar': sway's status bar component

swaynag

Install 'swaynag': shows a message with buttons

tray

Enable support for StatusNotifierItem tray specification

wallpapers

Install sway's default wallpaper image

X

Enable support for X11 applications (XWayland)

gui-wm/wayfire

gles3

Enable OpenGL ES 3.x Features.

X

Enable support for X11 applications (XWayland).

kde-apps/akonadi

designer

Install plugin for dev-qt/designer

tools

Install tools for developers and testing

webengine

Enable support for system-wide defined KAccounts

kde-apps/akregator

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

kde-apps/analitza

eigen

Enable dev-cpp/eigen mathematical templates support

kde-apps/ark

zip

Enable ZIP archive support via dev-libs/libzip

kde-apps/cantor

analitza

Enable kde-apps/analitza backend support

julia

Enable dev-lang/julia backend support

qalculate

Enable sci-libs/libqalculate backend support

R

Enable dev-lang/R backend support

webengine

Use dev-qt/qtwebengine as embedded QtHelp documentation browser

kde-apps/gwenview

activities

Enable kactivities support

fits

Enable support for NASA's sci-libs/cfitsio library

mpris

Enable support for MPRIS2 interface, requiring dev-qt/qtdbus as dependency.

Enable support for a share menu using kde-frameworks/purpose

kde-apps/k3b

webengine

Use dev-qt/qtwebengine for fancy k3bdiskinfoview

kde-apps/kaddressbook

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

kde-apps/kalarm

mpv

Use media-libs/mpvqt instead of media-video/vlc audio alarms playback)

pim

Enable birthday import, email functions etc. using kde-apps/akonadi

kde-apps/kalzium

editor

Enable the embedded molecule editor/viewer

solver

Enable the equation solver

kde-apps/kate-addons

filebrowser

Enable File System browser tool view

lspclient

Enable LSP (Language Server Protocol) client plugin

projects

Enable Project plugin for executing queries on SQL DBs

snippets

Enable Snippets Tool View plugin to manage or download code snippets

sql

Enable SQL plugin for executing queries on SQL DBs

kde-apps/kdeadmin-meta

cron

Installs KDE application for virtual/cron configuration

kde-apps/kde-apps-meta

accessibility

Pull in kde-apps/kdeaccessibility-meta packages

admin

Pull in kde-apps/kdeadmin-meta packages

education

Pull in kde-apps/kdeedu-meta packages

games

Pull in kde-apps/kdegames-meta packages

graphics

Pull in kde-apps/kdegraphics-meta packages

multimedia

Pull in kde-apps/kdemultimedia-meta packages

network

Pull in kde-apps/kdenetwork-meta packages

pim

Pull in KDE PIM suite

sdk

Pull in developer-specific meta-packages

utils

Pull in kde-apps/kdeutils-meta packages

kde-apps/kdecore-meta

Install kde-frameworks/purpose for share file context menu actions in kde-apps/dolphin

webengine

Enable www-client/falkon which depends on dev-qt/qtwebengine

kde-apps/kdeedu-meta

webengine

Enable packages requiring dev-qt/qtwebengine

kde-apps/kdegraphics-meta

color-management

Enable color management via media-libs/opencolorio

screencast

Pull in kde-apps/spectacle for screenshot/screenrecording support

webengine

Enable page scanning support via media-gfx/skanpage

kde-apps/kdemultimedia-meta

cdrom

Include packages for optical discs

kde-apps/kdenetwork-meta

bittorrent

Pull in net-p2p/ktorrent for BitTorrent protocol support

dropbox

Enable support for Dropbox in kde-apps/dolphin via kde-apps/dolphin-plugins-dropbox

samba

Enable support for net-fs/samba file sharing plugin from within file properties

screencast

Pull in kde-apps/krfb for Plasma desktop sharing support

webengine

Enable support for Google Drive integration via kde-misc/kio-gdrive

kde-apps/kdenlive

designer

Build plugins for dev-qt/designer

kde-apps/kdepim-addons

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

importwizard

Enable additional import plugins for kde-apps/akonadi-import-wizard

markdown

Enable Markdown support via app-text/discount

kde-apps/kdepim-meta

bogofilter

Install mail-filter/bogofilter for spam filter support in kde-apps/kmail

clamav

Install app-antivirus/clamav for virus detection support in kde-apps/kmail

spamassassin

Install mail-filter/spamassassin for spam filter support in kde-apps/kmail

kde-apps/kdepim-runtime

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

kde-apps/kdesdk-meta

git

Enable support for Git VCS in kde-apps/dolphin via kde-apps/dolphin-plugins-git

mercurial

Enable support for Mercurial VCS in kde-apps/dolphin via kde-apps/dolphin-plugins-mercurial

subversion

Enable support for Apache Subversion VCS in kde-apps/dolphin via kde-apps/dolphin-plugins-subversion

webengine

Enable dev-util/kdevelop, requiring dev-qt/qtwebengine

kde-apps/kdeutils-meta

7zip

Install app-arch/p7zip for 7zip archive support in kde-apps/ark

gpg

Install kde-apps/kgpg which depends on kde-apps/akonadi

lrz

Install app-arch/lrzip for LRZ archive support in kde-apps/ark

rar

Install one of app-arch/rar, app-arch/unrar or app-arch/unar for RAR archive support in kde-apps/ark

webengine

Install app-editors/ghostwriter and kde-apps/kimagemapeditor, requiring dev-qt/qtwebengine

kde-apps/kget

bittorrent

Enable bittorrent transfer plugin through net-libs/libktorrent

gpg

Enable signature verification by GpgME++ via app-crypt/gpgme

mms

Enable MMS (Microsoft Media Server) plugin through media-libs/libmms

kde-apps/kig

geogebra

Support files created by sci-mathematics/geogebra-bin

scripting

Support Python scripting

kde-apps/kio-extras

activities

Enable activities KIO worker and fileitem plugin

ios

Enable AFC (Apple File Conduit) KIO worker for iOS devices support

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

man

Enable manpages KIO worker

nfs

Enable NFS support using net-libs/libtirpc

phonon

Enable file audio preview plugin using media-libs/phonon

sftp

Enable SFTP protocol support using net-libs/libssh

taglib

Enable audio thumbnails via media-libs/taglib

X

Enable support for XCursor thumbnails via x11-libs/libX11

kde-apps/kleopatra

pim

Enable WKS publishing support using kde-apps/kmail

kde-apps/kmag

keyboardfocus

Enable keyboard focus tracking

kde-apps/kmail

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

kde-apps/konqueror

activities

Enable kactivities support

kde-apps/korganizer

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

kde-apps/krdc

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

kde-apps/ksystemlog

kdesu

Run as root using kdesu from kde-plasma/kde-cli-tools

kde-apps/ktouch

X

Enable support for X11 Keyboard Layout Detection

kde-apps/kwave

qtmedia

Enable playback via Qt5Multimedia

kde-apps/libkdepim

designer

Build plugins for dev-qt/designer

kde-apps/libkgapi

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

kde-apps/libksane

kwallet

Enable encrypted storage of passwords with kde-frameworks/kwallet

kde-apps/mailcommon

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

designer

Build plugins for dev-qt/designer

kde-apps/marble

aprs

Enable support for APRS data sources

designer

Install plugin for dev-qt/designer

geolocation

Enable position information via dev-qt/qtpositioning

pbf

Enable OpenStreetMap PBF file support via dev-libs/protobuf

phonon

Enable sound support via media-libs/phonon

shapefile

Enable support for ESRI shapefiles

webengine

Use dev-qt/qtwebengine for embedded web browser

kde-apps/okular

crypt

Enable support for password-encrypted documents via kde-frameworks/kwallet

epub

Enable E-Book support via app-text/ebook-tools

markdown

Enable Markdown support via app-text/discount

mobi

Enable mobipocket support via kde-apps/kdegraphics-mobipocket

phonon

Enable sound support via media-libs/phonon

qml

Install Okular Qml components

Enable support for a share menu using kde-frameworks/purpose

kde-apps/parley

webengine

Build browser integration for the editor, requires dev-qt/qtwebengine

kde-apps/pimcommon

activities

Enable Plasma Activities support via kde-plasma/plasma-activities

designer

Build plugins for dev-qt/designer

kde-apps/spectacle

Enable support for a share menu using kde-frameworks/purpose

kde-apps/step

qalculate

Enable the libqalculate library for unit conversion

kde-apps/thumbnailers

blender

Enable blender thumbnail generation using kde-frameworks/karchive

gettext

Enable PO file thumbnail generation using kde-apps/kdesdk-thumbnailers

mobi

Enable mobipocket thumbnail generation using kde-apps/kdegraphics-mobipocket

video

Enable video thumbnail generation using kde-apps/ffmpegthumbs

kde-apps/yakuake

absolute-position

Use kde-plasma/kwayland for absolute window positioning in KWin

kde-frameworks/kcompletion

designer

Build plugins for dev-qt/designer

kde-frameworks/kconfig

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

kde-frameworks/kconfigwidgets

designer

Build plugins for dev-qt/designer

kde-frameworks/kfilemetadata

epub

Enable support for reading EPUB ebook metadata

mobi

Enable mobipocket support via kde-apps/kdegraphics-mobipocket

kde-frameworks/kglobalaccel

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

kde-frameworks/kguiaddons

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

kde-frameworks/kiconthemes

designer

Build plugins for dev-qt/designer

kde-frameworks/kimageformats

eps

Support the EPS graphics file format

kde-frameworks/kinit

caps

Capabilities support for improved security and better OOM handling

kde-frameworks/kio

designer

Build plugins for dev-qt/designer

kwallet

Enable permanent storage of passwords for kpasswdserver with kde-frameworks/kwallet

kde-frameworks/kitemmodels

qml

Enable QML support via dev-qt/qtdeclarative

kde-frameworks/kitemviews

designer

Build plugins for dev-qt/designer

kde-frameworks/knewstuff

designer

Build plugins for dev-qt/designer

opds

Enable support for the Open Publication Distribution System via kde-frameworks/syndication

kde-frameworks/knotifications

phonon

Play notification sounds via media-libs/phonon instead of media-libs/libcanberra

qml

Enable QML support via dev-qt/qtdeclarative

speech

Enable text-to-speech notification support

kde-frameworks/knotifyconfig

phonon

Play notification sounds via media-libs/phonon instead of media-libs/libcanberra

kde-frameworks/kplotting

designer

Build plugins for dev-qt/designer

kde-frameworks/ktexteditor

editorconfig

Enable support for EditorConfig configuration files

kde-frameworks/ktextwidgets

designer

Build plugins for dev-qt/designer

kde-frameworks/kwallet

gpg

Support wallets with GnuPG encryption in addition to the default blowfish-encrypted file

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

kde-frameworks/kwidgetsaddons

designer

Build plugins for dev-qt/designer

kde-frameworks/kxmlgui

designer

Build plugins for dev-qt/designer

kde-frameworks/networkmanager-qt

teamd

Enable Teamd control support

kde-frameworks/prison

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

kde-frameworks/purpose

kaccounts

Enable support for system-wide defined KAccounts

webengine

Enable support for system-wide defined KAccounts

kde-frameworks/sonnet

aspell

Enable the app-text/aspell spell-checking backend

designer

Build plugins for dev-qt/designer

hunspell

Enable the app-text/hunspell spell-checking backend

qml

Enable QML/QtQuick support via dev-qt/qtdeclarative

kde-misc/kdeconnect

pulseaudio

Enable system volume control plugin using media-libs/libpulse

telephony

Enable telephony plugin using kde-frameworks/modemmanager-qt

X

Enable remote input mousepad plugin using x11-libs/libfakekey

kde-misc/kio-gdrive

kf6compat

Disable components colliding with KF6, depend on KF6 components instead

Enable support for a share menu using kde-frameworks/purpose

kde-misc/krename

office

Enable support for file naming based on ODF metadata

kde-misc/tellico

bibtex

Add support for bibtex importing using btparse from dev-perl/Text-BibTeX

discid

Add support for reading disc IDs from audio CDs

yaz

Add support for searching Z39.50 databases

kde-plasma/discover

firmware

Enable support for firmware upgrades using sys-apps/fwupd

flatpak

Enable support for flatpak repositories using sys-apps/flatpak

snap

Enable support for snap packages using app-containers/snapd

webengine

Enable webflow support using dev-qt/qtwebview and dev-qt/qtwebengine instead of default URL handler

kde-plasma/drkonqi

systemd

Enable Coredumpd integration

kde-plasma/kde-cli-tools

kdesu

Build graphical frontend for kde-frameworks/kdesu

kde-plasma/kdeplasma-addons

alternate-calendar

Support alternate calendar systems (currently Chinese or Indian) via dev-libs/icu

Enable applet for quickly sharing data to a variety of sources

webengine

Enable dictionary and web browser applets using dev-qt/qtwebengine

kde-plasma/kinfocenter

usb

Show USB device information

kde-plasma/ksystemstats

networkmanager

Enable improved backend for Network statistics using kde-frameworks/networkmanager-qt

kde-plasma/kwin

lock

Enable screen locking via kde-plasma/kscreenlocker

screencast

Enable screencast portal using media-video/pipewire

shortcuts

Enable global shortcuts support via kde-plasma/kglobalacceld

kde-plasma/plasma-desktop

ibus

Use ibus input method via app-i18n/ibus

scim

Enable applets that use app-i18n/scim

webengine

Build the OpenDesktop integration plugin

kde-plasma/plasma-firewall

firewalld

Build net-firewall/firewalld backend

ufw

Build net-firewall/ufw backend

kde-plasma/plasma-login-sessions

wayland

Install Wayland session file for Display Managers

X

Install X11 session file for Display Managers (default is Wayland if both enabled)

kde-plasma/plasma-meta

browser-integration

Enable integration with Chrome/Firefox with browser extensions

colord

Enable kde-plasma/kwin color management via x11-misc/colord

crash-handler

Pull in kde-plasma/drkonqi for assisted upstream crash reports

crypt

Pull in kde-plasma/plasma-vault for encrypted vaults integration

discover

Pull in resources management GUI; a centralised GHNS alternative and optional sys-apps/fwupd frontend

display-manager

Pull in a graphical display manager

firewall

Pull in kde-plasma/plasma-firewall for system firewall administration

flatpak

Pull in kde-plasma/flatpak-kcm for flatpak permissions administration

grub

Pull in Breeze theme for sys-boot/grub

gtk

Enable Breeze widget style and system settings module for GTK+

kwallet

Enable support for KWallet auto-unlocking via kde-plasma/kwallet-pam

oxygen-theme

Pull in Oxygen icons, sound theme and visual style for KDE Plasma

plymouth

Pull in Breeze theme for sys-boot/plymouth

pulseaudio

Install Plasma applet for PulseAudio volume management

qt5

Pull in required packages for seamless integration of KF5/Qt5-based applications

sddm

Pull in the x11-misc/sddm display manager and system settings module

sdk

Pull in kde-plasma/plasma-sdk for Plasma development

smart

Pull in kde-plasma/plasma-disks for disk health monitoring

thunderbolt

Pull in kde-plasma/plasma-thunderbolt control center module

unsupported

Allow packages that are known to ruin runtime experience ** DO NOT FILE BUGS WITH THIS ENABLED **

wacom

Pull in kde-plasma/wacomtablet control center module

wallpapers

Install wallpapers for the Plasma Workspace

webengine

Use kde-apps/khelpcenter to access the locally installed KDE Help System Handbook

xwayland

Enable Wayland windows screensharing to XWayland applications via gui-apps/xwaylandvideobridge

kde-plasma/plasma-nm

openconnect

Build support for the OpenConnect VPN client

teamd

Enable Teamd control support

kde-plasma/plasma-workspace

appstream

Enable AppStream software metadata support

geolocation

Enables dataengine providing location information

policykit

Enable locale generation and Users KCM using sys-auth/polkit and sys-apps/accountsservice

screencast

Enable screencast portal using kde-plasma/kpipewire

telemetry

Enable User Feedback control module for kde-plasma/systemsettings

wallpaper-metadata

Show metadata for image wallpaper plugin using kde-apps/libkexiv2

kde-plasma/powerdevil

brightness-control

Enable screen brightness control using app-misc/ddcutil

llvm-core/clang

extra

Build extra tools (clangd, clang-tidy and a few more)

ieee-long-double

Use accelerated 128-bit IEEE long double ABI (ppc64le only)

static-analyzer

Install the Clang static analyzer

llvm-core/clang-common

bootstrap-prefix

!!internal use only!! DO NOT SET THIS FLAG YOURSELF!, used for bootstrapping Gentoo Prefix

cet

Enable support for control flow hijacking protection. On amd64, this provides Intel Control Flow Enforcement Technology (CET). Only provides benefits on newer CPUs. For Intel, the CPU must be at least as new as Tiger Lake. For AMD, it must be at least as new as Zen 3. This is harmless on older CPUs, but provides no benefit either.

default-compiler-rt

Use compiler-rt + libunwind instead of libgcc as the default rtlib for clang

default-libcxx

Use libc++ instead of libstdc++ as the default stdlib for clang

default-lld

Use lld as the default linker for clang

stricter

Default to stricter behavior known from newer clang versions, turning more warnings into errors

llvm-core/clang-runtime

compiler-rt

Install llvm-runtimes/compiler-rt for -rtlib=compiler-rt

libcxx

Install llvm-runtimes/libcxx for -stdlib=libc++

offload

Install llvm-runtimes/offload for -fopenmp GPU offloading

openmp

Install llvm-runtimes/openmp for -fopenmp support

sanitize

Enable compiler-rt sanitizer (-fsanitize*) support

llvm-core/clang-toolchain-symlinks

gcc-symlinks

Install symlinks for 'gcc' and 'g++' for extra compatibility.

multilib-symlinks

Install symlinks for all ABI CHOSTs. Note that this can result in gcc being overrode for native builds, as well as conflict with crossdev if used for the same targets.

native-symlinks

Install generic tool symlinks like 'cc' and 'c++', as well as ${CTARGET}-*. These symlinks are installed into slotted LLVM bindir, so they should not take precedence over symlinks installed into /usr/bin by sys-devel/gcc-config but they can be helpful for GCC-free setups.

llvm-core/libclc

spirv

Build SPIRV targets

llvm-core/lldb

debuginfod

Expose the transitive dependencies on net-misc/curl and dev-cpp/cpp-httplib) to match llvm-core/llvm.

llvm-core/lld-toolchain-symlinks

multilib-symlinks

Install symlinks for all ABI CHOSTs. Note that this can result in gcc being overrode for native builds, as well as conflict with crossdev if used for the same targets.

native-symlinks

Install generic 'ld' symlink, as well as ${CTARGET}-ld. These symlinks are installed into slotted LLVM bindir, so they should not take precedence over symlinks installed into /usr/bin by sys-devel/binutils-config but they can be helpful for binutils-free setups.

llvm-core/llvm

binutils-plugin

Build the binutils plugin

debuginfod

Install llvm-debuginfod (requires net-misc/curl and dev-cpp/cpp-httplib)

doc

Build and install the HTML documentation and regenerate the man pages

exegesis

Enable performance counter support for llvm-exegesis tool that can be used to measure host machine instruction characteristics

ncurses

Support querying terminal properties using ncurses' terminfo

xar

Support dumping LLVM bitcode sections in Mach-O files (uses app-arch/xar)

z3

Enable support for sci-mathematics/z3 constraint solver

llvm-core/llvm-toolchain-symlinks

multilib-symlinks

Install symlinks for all ABI CHOSTs. Note that this can result in gcc being overrode for native builds, as well as conflict with crossdev if used for the same targets.

native-symlinks

Install generic tool symlinks like 'objdump' and 'ranlib', as well as ${CTARGET}-*. These symlinks are installed into slotted LLVM bindir, so they should not take precedence over symlinks installed into /usr/bin by sys-devel/binutils-config but they can be helpful for binutils-free setups.

llvm-runtimes/compiler-rt

atomic-builtins

Compile atomic builtins into compiler-rt.builtins. This is needed on systems without GCC/libatomic, but requires using Clang to build.

clang

Force building using installed clang (rather than the default CC/CXX).

llvm-runtimes/compiler-rt-sanitizers

llvm-runtimes/libcxx

clang

Force building using installed clang (rather than the default CC/CXX; required for testing).

libcxxabi

Build on top of llvm-runtimes/libcxxabi instead of gcc's libsupc++ (avoids depending on gcc).

llvm-runtimes/libcxxabi

clang

Force building using installed clang (rather than the default CC/CXX; required for testing).

llvm-runtimes/libunwind

clang

Force building using installed clang (rather than the default CC/CXX; required for testing).

llvm-runtimes/offload

ompt

Enable OpenMP Tools Interface support

llvm-runtimes/openmp

gdb-plugin

Build OMPD GDB plugin

hwloc

Enable CPU affinity support via hwloc

offload

Support offloading OpenMP using libomptarget

ompt

Enable OpenMP Tools Interface support

lxqt-base/liblxqt

backlight

Enable backlight control features.

lxqt-base/lxqt-config

monitor

Build monitor settings tool

touchpad

Build touchpad settings tool

lxqt-base/lxqt-meta

about

Install lxqt-base/lxqt-about

admin

Install lxqt-base/lxqt-admin

archiver

Install app-arch/lxqt-archiver

desktop-portal

Enable the LXQt sys-apps/xdg-desktop-portal backend implementation

display-manager

Install a graphical display manager

filemanager

Install x11-misc/pcmanfm-qt file manager

lximage

Install media-gfx/lximage-qt image viewer

minimal

Do not install x11-wm/openbox window manager

nls

Install dev-qt/qttranslations to better support different locales

powermanagement

Install lxqt-base/lxqt-powermanagement package

processviewer

Install x11-misc/qps package

screenshot

Install x11-misc/screengrab package

sddm

Install x11-misc/sddm display manager

ssh-askpass

Install lxqt-base/lxqt-openssh-askpass user password prompt tool

sudo

Install lxqt-base/lxqt-sudo

terminal

Install x11-terms/qterminal package

trash

Install gnome-base/gvfs to enable 'trash' functionality in x11-misc/pcmanfm-qt

window-manager

Install kde-plasma/kwin window manager

lxqt-base/lxqt-panel

colorpicker

Build colorpicker plugin

cpuload

Build cpuload plugin

desktopswitch

Build desktopswitch plugin

directorymenu

Build directorymenu plugin

dom

Build dom plugin

kbindicator

Build kbindicator plugin

mainmenu

Build mainmenu plugin

mount

Build mount plugin

networkmonitor

Build networkmonitor plugin

quicklaunch

Build quicklaunch plugin

showdesktop

Build showdesktop plugin

spacer

Build spacer plugin

statusnotifier

Build statusnotifier plugin

sysstat

Build sysstat plugin

taskbar

Build taskbar plugin

tray

Build tray plugin

volume

Build volume plugin

worldclock

Build worldclock plugin

mail-client/aerc

notmuch

Enable support for net-mail/notmuch

mail-client/alot

doc

Install user manual and API documentation

mail-client/alpine

chappa

enhance Alpine by applying Eduardo Chappa's patches

onlyalpine

installs only the alpine binary, so it does not collied with pico and/or pine

passfile

Adds support for caching passwords into a file between sessions

smime

Enable support for S/MIME

mail-client/balsa

rubrica

Adds support for rubrica addressbook

systray

Enable System Tray Icon support

mail-client/claws-mail

archive

Enable archiving plugin

bogofilter

Build mail-filter/bogofilter plugin

libcanberra

Enable sound notification in connection with USE=notification

libnotify

Enable notification on the desktop in connection with USE=notification

litehtml

Enable dev-libs/gumbo html viewer plugin

notification

Notification for new mail in different way, see also USE flags libcanberra, libindicate and libnotify

oauth

Enable OAuth2 authentication support

pgp

Enable PGP support

python

Enable plugin for Python scripting

sieve

Build plugin for sieve filter support

smime

Build plugin for S/MIME support

spamassassin

Build mail-filter/spamassassin plugin

spam-report

Enable plugin for spam reporting to various services

mail-client/evolution

archive

Enable archives support in attachments via app-arch/gnome-autoar

bogofilter

Build mail-filter/bogofilter plugin

geolocation

Enable support for displaying contacts on a map inside evolution using media-libs/libchamplain

highlight

Enable text highlighting plugin

ldap

Enable support for fetching contacts from an LDAP or Active Directory server using net-nds/openldap

libnotify

Enable desktop notifications through x11-libs/libnotify

sound

Enable sound notifications using media-libs/libcanberra-gtk3

spamassassin

Build mail-filter/spamassassin plugin

weather

Enable optional weather calendar support

ytnef

Enable optional TNEF attachments parser support using net-mail/ytnef

mail-client/geary

ytnef

Enable optional TNEF attachments parser support using net-mail/ytnef

mail-client/mutt

autocrypt

Enable autocrypt.org support

berkdb

Enable sys-libs/db database backend for header caching

gdbm

Enable sys-libs/gdbm database backend for header caching

gpgme

Build gpgme backend to support S/MIME, PGP/MIME and traditional/inline PGP

gsasl

Use GNU SASL via virtual/gsasl instead of Cyrus SASL (requires USE=sasl)

hcache

Enable header cache, one database backend needs to be enabled

lmdb

Enable dev-db/lmdb database backend for header caching

pgp-classic

Build classic_pgp backend to support PGP/MIME and traditional/inline PGP

pop

Enable support for POP3 mailboxes

smime-classic

Build classic_smime backend to support S/MIME

smtp

Enable support for direct SMTP delivery

tokyocabinet

Enable dev-db/tokyocabinet database backend for header caching

mail-client/neomutt

autocrypt

Enable autocrypt.org support

berkdb

Enable BDB (Berkley DB) backend for header caching

gdbm

Enable GDBM (GNU dbm) backend for header caching

gpgme

Build gpgme backend to support S/MIME, PGP/MIME and traditional/inline PGP

kyotocabinet

Enable Kyoto Cabinet database backend for header caching

lmdb

Enable LMDB (Lightning Memory-Mapped Database) backend for header caching

lz4

Add lz4 support for header cache compression

notmuch

Enable support for net-mail/notmuch

pgp-classic

Build classic-pgp backend to support PGP/MIME and traditional/inline PGP

qdbm

Enable QDBM (Quicker Database Manager) database backend for header caching

smime-classic

Build classic-smime backend to support S/MIME

tokyocabinet

Enable Tokyo Cabinet database backend for header caching

zlib

Add zlib support for header cache compression

zstd

Add zstd support for header cache compression

mail-client/roundcube

change-password

Allow users to change passwords through Roundcube

enigma

Add dependencies to support server-side GnuPG signing and/or encryption through the enigma plugin

fileinfo

Use the dev-lang/php fileinfo extension to guess the mime_type of attachments

ldap

Add dependencies to support connecting to an LDAP address book server

mail-client/s-nail

kerberos

If network is enabled, this adds support for GSSAPI login on IMAP through virtual/krb5.

net

Enable support for network protocols (POP, IMAP and SMTP). If you only need to send mail with the local Transport Agent, disabling this will get you support for only /usr/sbin/sendmail call.

ssl

If network is enabled, this adds support for S/MIME and SSL/TLS-powered protocols through dev-libs/openssl.

mail-client/thunderbird

clang

Use Clang compiler instead of GCC

eme-free

Disable EME (DRM plugin) capability at build time

hwaccel

Force-enable hardware-accelerated rendering (Mozilla bug 594876)

libproxy

Enable libproxy support

pgo

Add support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time.

pulseaudio

Add sound server support via media-libs/libpulse (may be PulseAudio or Pipewire, or apulse if installed)

rust-extensions

Compile and install experimental rust extensions, that may become part of Thunderbird some day.

sndio

Enable support for the media-sound/sndio backend

system-av1

Use the system-wide media-libs/dav1d and media-libs/libaom library instead of bundled.

system-harfbuzz

Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled.

system-icu

Use the system-wide dev-libs/icu instead of bundled.

system-jpeg

Use the system-wide media-libs/libjpeg-turbo instead of bundled.

system-libevent

Use the system-wide dev-libs/libevent instead of bundled.

system-librnp

Use system-wide dev-util/librnp instead of bundled one.

system-libvpx

Use the system-wide media-libs/libvpx instead of bundled.

system-png

Use the system-wide media-libs/libpng instead of bundled (requires APNG patches)

system-webp

Use the system-wide media-libs/libwebp instead of bundled.

wifi

Enable necko-wifi for NetworkManager integration, and access point MAC address scanning for better precision with opt-in geolocation services

mail-filter/amavisd-new

courier

Add courier support

dkim

Add DomainKeys Identified Mail support

qmail

Add qmail support

razor

Add support for mail-filter/razor

rspamd

Add support for mail-filter/rspamd extension (HTTP only)

rspamd-https

Add support for mail-filter/rspamd extension (both HTTP and HTTPS)

spamassassin

Add support for mail-filter/spamassassin

mail-filter/bogofilter

tokyocabinet

Enable Tokyo Cabinet database support

mail-filter/dcc

rrdtool

Enable net-analyzer/rrdtool interface scripts

mail-filter/libmilter

poll

Use poll instead of select

mail-filter/maildrop

authlib

Add courier-authlib support

dovecot

Add dovecot authentication support

tools

Install maildirmake and deliverquota tools

trashquota

Count deleted messages as part of the maildir quota

mail-filter/MailScanner

exim

Set mail-mta/exim to used MTA

postfix

Set mail-mta/postfix to used MTA

spamassassin

Enable usage of mail-filter/spamassassin for spam protection

mail-filter/mimedefang

poll

Use poll instead of select

mail-filter/opendkim

ldap

Enable openldap as a dataset facilitator or keys, determining domains to sign for, and any other dataset that opendkim supports.

lmdb

Add support for using dev-db/lmdb

lua

Enables control over signature verification, filtering and policy to be controlled by user defined lua scripts.

memcached

Add support for using dev-libs/libmemcached

opendbx

Use opendbx backend to facilitate dataset driven OpenDKIM configuration options like stats, bodylengthdb, etc. against a wide variety of database types

poll

Use poll() instead of select() for the provided asynchronous resolver library.

querycache

Add support for query caching (requires 'berkdb' flag)

sasl

Used to authenticate to a LDAP server in various ways if required.

stats

Add support for statistics (requires 'opendbx' flag)

unbound

Use the unbound dnssec library to perform DKIM DNS queries.

mail-filter/opendmarc

reports

Install the reports binaries: expire, import, reports, params

spf

Use the mail-filter/libspf2 for Sender Policy Framework checking

mail-filter/pyzor

gdbm

Enables the Gdbm back-end database engine for pyzord

mysql

Enables the MySQL back-end database engine for pyzord through dev-python/mysqlclient.

pyzord

Enable the pyzord server daemon

redis

Enables the redis back-end database engine for pyzord through dev-python/redis

mail-filter/rspamd

hyperscan

Enable hyperscan for fast regexp processing

jit

Enable PCRE JIT support

mail-filter/spamassassin

cron

Install a cron job to update SpamAssassin's rules daily.

qmail

Build qmail functionality and docs

mail-mta/courier

fax

Enables fax support in the courier mail server

norewrite

Prevents courier mail server from mangling virtual user addresses when sending

web

Enable the web interface

webmail

Enable the webmail interface

mail-mta/exim

arc

Adds support for Authenticated Receive Chain (ARC)

dane

Adds support for DNS-based Authentication of Named Entities

dcc

Adds support for Distributed Checksum Clearinghouse (DCC)

dkim

Adds support for DomainKeys Identified Mail (DKIM)

dlfunc

Install local_scan.h header to compile separate dlfunc libraries

dmarc

Adds support for DMARC

dnsdb

Adds support for a DNS search for a record whose domain name is the supplied query

dovecot-sasl

Adds support for Dovecot's authentication

dsn

Adds support for Delivery Status Notifications (DSN)

lmtp

Adds support for lmtp

mbx

Adds support for UW's mbx format

pkcs11

Require pkcs11 support in net-libs/gnutls with USE=gnutls

prdr

Adds support for Per-Recipient Data Response

proxy

Add support for being behind a proxy, such as HAProxy

redis

Adds support for querying dev-db/redis

spf

Adds support for Sender Policy Framework

srs

Adds support for Sender Rewriting Scheme

tdb

Use sys-libs/tdb for internal database storage (such as hints database)

tpda

Adds support for Transport Post-Delivery Actions

mail-mta/msmtp

daemon

Build/install msmtpd MTA daemon

mta

Enable this to install as system-wide MTA

mail-mta/netqmail

gencertdaily

Generate SSL certificates daily instead of hourly

highvolume

Prepare netqmail for high volume servers

pop3

Include POP3 server

mail-mta/notqmail

gencertdaily

Generate SSL certificates daily instead of hourly

highvolume

Prepare notqmail for high volume servers

pop3

Include POP3 server

mail-mta/opensmtpd

mta

Enable this to install as system-wide MTA

mail-mta/postfix

dovecot-sasl

Enable net-mail/dovecot protocol version 1 (server only) SASL implementation

eai

Add support for SMTPUTF8

ldap-bind

Add support for binding to LDAP backend using dev-libs/cyrus-sasl

lmdb

Add support for using dev-db/lmdb for lookup tables

memcached

Add support for using net-misc/memcached for lookup tables

mongodb

Add support for using dev-db/mongodb for lookup tables

mail-mta/qpsmtpd

postfix

create user with permissions for proper postfix interaction

mail-mta/ssmtp

mta

Install symlinks for sendmail-compatible MTA.

mate-base/caja

mate

Install x11-themes/mate-icon-theme which is needed when this package is used in the MATE desktop environment.

mate-base/mate

base

Install base MATE Desktop applications that are recommended for the most common usage; for example, this installs the file manager. Disable this and other USE flags if you want a more minimal MATE Desktop.

extras

Install additional MATE Desktop applications that are recommended for extended usage of the MATE Desktop as upstream sees it; for example, this installs MATE Desktop's office related applications. Disable this if you plan to use your own non-MATE Desktop alternatives or a custom mixture of MATE and non-MATE packages.

help

Install gnome-extra/yelp to handle in application help menus and documentation browsing

notification

Force notification daemon to default to MATE's notification daemon. Enabled by default. Disable if it causes conflicts with other installed desktop environments.

themes

Install MATE Desktop's themes; if you use other themes, you can disable this to spare some space and time.

mate-base/mate-applets

cpupower

Enable support for cpu frequency manipulation using sys-power/cpupower

netlink

Use dev-libs/libnl

mate-base/mate-applets-meta

appindicator

Pull in mate-extra/mate-indicator-applet for AppIndicator applet

sensors

Pull in mate-extra/mate-sensors-applet for hw sensors applet

mate-base/mate-control-center

accountsservice

Add support for AccountsService

mate-base/mate-session-manager

gles2

Build with support for GLESv2 acceleration sessions

mate-base/mate-settings-daemon

rfkill

build support for rfkill

mate-extra/caja-extensions

cdr

Add an extension to burn files to cds using app-cdr/brasero.

gajim

Add an extension to support net-im/gajim.

image-converter

Add image conversion support.

mail

Add an extension to support e-mail functionality.

media

Add video audio extension with totem.

open-terminal

Add an extension to support an open terminal.

pidgin

Add an extension to support net-im/pidgin

Add an extension to support sharing files.

wallpaper

Add an extension to support setting an image as the current wallpaper

mate-extra/mate-polkit

accountsservice

Support extraction of data from AccountsService

mate-extra/mate-power-manager

applet

Enable building of the MATE applet.

mate-extra/mate-system-monitor

wnck

Enable experimental support using x11-libs/libwnck.

mate-extra/mate-tweak

dropdown

Support the x11-terms/tilda dropdown terminal emulator

mate-extra/mate-utils

applet

Enable the mate dictionary applet

media-fonts/corefonts

tahoma

Also install the Tahoma font. Due to the lack of a free bold variant, this may render badly. See bug 184790.

media-fonts/culmus

ancient

Install ancient semitic scripts

fancy

Install fancy fonts

fontforge

Use media-gfx/fontforge to build fonts from source

taamey

Install taamey fonts

media-fonts/dejavu

fontforge

Use media-gfx/fontforge to build fonts from source

media-fonts/fonts-meta

emoji

Install a font supporting emojis

latin

Install additional latin fonts

ms

Install (free) fonts for the "ms" preset

media-fonts/intlfonts

bdf

Install BDF fonts in addition to PCF

media-fonts/iosevka

iosevka

Install the classic Iosevka font.

iosevka-aile

Install Iosevka Aile, a quasi-proportional sans-serif font.

iosevka-curly

Install Iosevka Curly, a curlier variant of Iosevka.

iosevka-curly-slab

Install Iosevka Curly Slab, the curly font, with slab-serifs.

iosevka-etoile

Install Iosevka Etoile, a quasi-proportional slab-serif font.

iosevka-slab

Install Iosevka Slab, a monospace slab-serif font.

iosevka-ss01

Install Iosevka SS01, an Iosevka variant made in the style of Andale Mono.

iosevka-ss02

Install Iosevka SS02, an Iosevka variant made in the style of Anonymous Pro Style.

iosevka-ss03

Install Iosevka SS03, an Iosevka variant made in the style of Consolas.

iosevka-ss04

Install Iosevka SS04, an Iosevka variant made in the style of Menlo.

iosevka-ss05

Install Iosevka SS05, an Iosevka variant made in the style of Fira Mono.

iosevka-ss06

Install Iosevka SS06, an Iosevka variant made in the style of Liberation Mono.

iosevka-ss07

Install Iosevka SS07, an Iosevka variant made in the style of Monaco.

iosevka-ss08

Install Iosevka SS08, an Iosevka variant made in the style of Pragmata Pro.

iosevka-ss09

Install Iosevka SS09, an Iosevka variant made in the style of Source Code Pro.

iosevka-ss10

Install Iosevka SS10, an Iosevka variant made in the style of Envy Code R.

iosevka-ss11

Install Iosevka SS11, an Iosevka variant made in the style of X Windows Fixed.

iosevka-ss12

Install Iosevka SS12, an Iosevka variant made in the style of Ubuntu Mono.

iosevka-ss13

Install Iosevka SS13, an Iosevka variant made in the style of Lucida.

iosevka-ss14

Install Iosevka SS14, an Iosevka variant made in the style of JetBrains Mono.

iosevka-ss15

Install Iosevka SS15, an Iosevka variant made in the style of IBM Plex Mono.

iosevka-ss16

Install Iosevka SS16, an Iosevka variant made in the style of PT Mono.

iosevka-ss17

Install Iosevka SS17, an Iosevka variant made in the style of Recursive Mono.

iosevka-ss18

Install Iosevka SS18, an Iosevka variant made in the style of Input Mono.

media-fonts/liberation-fonts

fontforge

Use media-gfx/fontforge to build fonts from source

media-fonts/montecarlo

bdf

Install BDF fonts in addition to PCF

media-fonts/mplus-outline-fonts

ipafont

Generates new fonts merged with media-fonts/ja-ipafonts

media-fonts/noto

extra

Install full upstream font set including condensed, semi-bold, extra-light variants

media-fonts/noto-emoji

icons

Install Noto Emoji icon theme

media-fonts/terminus-font

a-like-o

Changes view of letter 'a' - a looks like o (see homepage)

center-tilde

Place the '~' character vertically centered on the line instead of to the top.

distinct-l

ll2 variant with more distinctive l (lowercase L)

otf

Install Open Type Font (OTF) (required for HarfBuzz backend)

pcf-8bit

Install Portable Compiled Font (PCF) (X11 bitmap fonts), 8-bit encodings

pcf-unicode

Install Portable Compiled Font (PCF) (X11 bitmap fonts), Unicode encodings

psf

Install PC Screen Font (PSF) with unicode data (for linux console)

quote

Changes view of quotes: symmetric ` and ' instead of asymmetric one (see homepage)

ru-dv

Changes view of Russian letters 'de' and 've' (see homepage)

ru-g

Changes view of Russian letter 'ge' (see homepage)

ru-i

Changes view of Russian letter 'i' - not like Latin u, but like "mirrored" N (see homepage)

ru-k

Changes view of Russian letter 'k' (see homepage)

media-fonts/unifont

fontforge

Use media-gfx/fontforge to build fonts from source

utils

Install unifont utilities

media-gfx/ahoviewer

plugins

Build plugin support for now, in future pull additional plugins

rar

Rar archive support

zip

Zip archive support

media-gfx/album

plugins

Install optional plugins

themes

Install optional themes

media-gfx/alembic

hdf5

Add support sci-libs/hdf5

test

Build and run the test-suite

media-gfx/asymptote

boehm-gc

Enables using the Boehm-Demers-Weiser conservative garbage collector

context

Enables support for ConTeXt format (dev-texlive/texlive-context)

curl

Enables running remote programs via net-misc/curl

lsp

Enables Language Server Protocol

offscreen

Enables off-screen rendering

sigsegv

Enables using dev-libs/libsigsegv

media-gfx/blender

alembic

Add support for Alembic through media-gfx/alembic.

bullet

Enable Bullet (Physics Engine).

collada

Add support for Collada interchange format through media-libs/opencollada.

color-management

Enable color management via media-libs/opencolorio.

cuda

Build cycles renderer with nVidia CUDA support.

cycles

Enable the Cycles raytracing render engine.

cycles-bin-kernels

Precompile the cycles render kernels for the CUDA/HIP/OneAPI backends, if they are enabled, at compile time. This makes it so that the user doesn't have to wait for the kernels to compile when they are used for the first time in Blender. If this option is not on, they will be built as needed at runtime.

dds

Adds DDS textures support to Blender.

embree

Use embree to accelerate certain areas of the Cycles render engine.

experimental

Build Experimental Blender Modules

fluid

Adds fluid simulation support via the built-in Mantaflow library.

hip

Build cycles renderer with AMD HIP support.

nanovdb

Enable nanoVDB support in Cycles. Uses less memory than regular openVDB when rendering.

ndof

Enable NDOF input devices (SpaceNavigator and friends).

oidn

Enable OpenImageDenoiser Support

oneapi

Build OIDN with Intel oneAPI SyCL support

openpgl

Enable path guiding support in Cycles

opensubdiv

Add rendering support form OpenSubdiv from Dreamworks Animation through media-libs/opensubdiv.

openvdb

Enable openvdb for volumetric processing, like the voxel remesher. Also enables volumetric GPU preview rendering for Nvidia cards.

optix

Add support for NVIDIA's OptiX Raytracing Engine.

osl

Add support for OpenShadingLanguage scripting.

potrace

Add support for converting bitmaps into Grease pencil line using the potrace library.

pugixml

Enable PugiXML support (Used for OpenImageIO, Grease Pencil SVG export)

renderdoc

Build Blender with renderdoc support

tbb

Use threading building blocks library from dev-cpp/tbb.

vulkan

Add support for the experimental Vulkan viewport backend

media-gfx/chafa

tools

Build command-line tools

media-gfx/darktable

gamepad

Support using game controllers as input devices

geolocation

Enable geotagging support

kwallet

Enable encrypted storage of passwords with kde-frameworks/kwallet

lto

Enable link-time optimisations in the RawSpeed library

midi

Support using MIDI input devices such as Behringer X-Touch Mini, Arturia Beatstep or Korg nanoKONTROL2, as input devices

tools

Install tools for generating base curves and noise profiles

media-gfx/digikam

addressbook

Enable akonadi contact integration

imagemagick

Enable support for additional image formats such as XCF, FITS, HEIC etc.

lensfun

Enable support for media-libs/lensfun

panorama

Build the panorama plugin which requires media-gfx/hugin

semantic-desktop

Enable kde-frameworks/kfilemetadata support

video

Enable integrated video player

media-gfx/eog-plugins

map

Enable world map display using media-libs/libchamplain

media-gfx/eom

imagemagick

Use media-gfx/imagemagick as an external backend for the thumbnailer

media-gfx/exact-image

swig

Adds Swig support dev-lang/swig

media-gfx/exiv2

bmff

Add support for the ISOBMFF format

webready

Support reading metadata over the internet

media-gfx/fbida

fbcon

Install the framebuffer image viewer "fbi"

ghostscript

Install the framebuffer ghostscript viewer "fbgs"

X

Install the Motif based image viewer "ida"

media-gfx/fig2dev

ghostscript

Require app-text/ghostscript-gpl to export PDF an bitmap formats

media-gfx/fontforge

truetype-debugger

Enable truetype debugger in fontforge

woff2

Enable support for WOFF2 format

media-gfx/fotowall

webcam

Enable webcam support

media-gfx/freecad

addonmgr

Build the addon manager module for automatic handling of 3rd party addons

bim

Build the BIM module and workbench

cam

Build the CAM module and workbench

cloud

Build the Cloud workbench, to access cloud providers (mostly Amazon S3).

designer

Build and install the Qt designer plugin, so the FreeCAD widgets can be used from within designer.

fem

Build the FEM module and workbench which provides Finite Element Analysis (FEA) workflows

gui

Build FreeCAD with a Qt based GUI. If built without setting this USE flag, FreeCAD can be used in a headless mode, for server-side instances. The Python modules are available, without their GUI parts though, if this is unset.

idf

Build the IDF module to provide file exchange capabilities with IDF files

inspection

Build the inspection workbench which gives you specific tools for examination of shapes (experimental)

mesh

Build the mesh module and workbench

netgen

Build support for the netgen mesher through media-gfx/netgen.

openscad

Build the OpenSCAD module for interoperability with OpenSCAD and repairing Constructive Solid Geometry (CSG) history

pcl

Use external sci-libs/pcl for point clouds support.

points

Build the points module and workbench for working with point clouds

reverse

Build the reverse engineering module and workbench

robot

Build the robot module and workbench for studying robot movements

smesh

Build Salome SMESH

spacenav

Add support for space navigator devices through dev-libs/libspnav

surface

Build the surface module and workbench

techdraw

Build the techdraw module and workbench, a more advanced and feature-rich successor of the drawing workbench

media-gfx/geeqie

ffmpegthumbnailer

Enable video thumbnail support with media-video/ffmpegthumbnailer

map

Enable items GPS map display

media-gfx/gimp

fits

Enable support for loading/exporting FITS images

vector-icons

Enable support for vector icons (experimental)

media-gfx/graphicsmagick

dynamic-loading

Compile graphicsmagick with dynamically loadable modules

fpx

Enable FlashPix support with media-libs/libfpx

q16

Set storage quantum size to 16 (~2*memory)

q32

Set storage quantum size to 32 (~5*memory)

zip

Build with dev-libs/libzip to support the OpenRaster (ORA) format.

media-gfx/graphviz

devil

Enables DevIL output plugin -Tdevil

gtk2

Enables gtk+ output plugin -Tgtk (needs cairo)

gts

Enables support for GNU Triangulated Surface Library (required for sfdp to work)

lasi

Enables PostScript output via media-libs/lasi, for plugin -Tlasi (needs cairo)

X

Builds unflatten, vimdot, builds plugin -Txlib, and enables support for x11 in various other modules (needs cairo)

media-gfx/gthumb

slideshow

Enable slideshow plugin

media-gfx/hugin

sift

automatically align images with media-gfx/autopano-sift-C

media-gfx/imagemagick

corefonts

Use media-fonts/corefonts which is required by some commands

fpx

Enable media-libs/libfpx support

hdri

Enable High Dynamic Range Images formats

lqr

Enable experimental liquid rescale support using media-libs/liblqr

pango

Enable Pango support using x11-libs/pango

q32

Set quantum depth value to 32

q8

Set quantum depth value to 8

media-gfx/imv

freeimage

Use media-libs/freeimage for additional image support

media-gfx/inkscape

cdr

Enable support for CorelDRAW files via media-libs/libcdr

dia

Enable DIA flow chart import via app-office/dia

inkjar

Enable support for OpenOffice.org SVG jar files

sourceview

Enable syntax highlighting support via x11-libs/gtksourceview

svg2

Enable support for new SVG2 features

visio

Enable support for Microsoft Visio diagrams via media-libs/libvisio

wpg

Enable support for WordPerfect graphics via app-text/libwpg

media-gfx/iscan-plugin-gt-f500

minimal

Install the firmware only, and not the plugin.

media-gfx/kphotoalbum

map

Enable map display support using kde-apps/marble

phonon

Enable media-libs/phonon video backend (known to crash on some video formats)

Enable support for a share menu using kde-frameworks/purpose

vlc

Enable media-video/vlc video backend (recommended for X11)

media-gfx/krita

color-management

Enable color management via media-libs/opencolorio

media

Enable sound support for animations via media-libs/mlt

mypaint-brush-engine

Enable MyPaint brush engine support media-libs/libmypaint

xsimd

Enable usage of SIMD instructions via dev-cpp/xsimd

media-gfx/librecad

tools

Build additional tool programs: tff2lff

media-gfx/luminance-hdr

fits

Enable support for the FITS format

media-gfx/mandelbulber

opencl

Enable GPU rendering support using OpenCL

media-gfx/meshlab

double-precision

Use double type instead of float type for scalars

media-gfx/netgen

logging

Enable logging through dev-libs/spdlog

opencascade

Enable OpenCASCADE support

media-gfx/nomacs

opencv

Build support for media-libs/opencv

plugins

Build officially support plugins

media-gfx/okularpart

epub

Enable E-Book support via app-text/ebook-tools

mobi

Enable mobipocket support via kde-apps/kdegraphics-mobipocket

media-gfx/openclipart

gzip

Compresses clip art using gzip

media-gfx/openscad

egl

Build using EGL instead of GLX

experimental

Enable experimental features

glx

Enable GLX to interface OpenGL and X11

gui

Enable or disable building of the GUI

hidapi

Build in support for HID-Class devices using dev-libs/hidapi

manifold

Enable Manifold render backend via sci-mathematics/manifold

mimalloc

Build using dev-libs/mimalloc as memory allocator

spacenav

Add support for space navigator devices through dev-libs/libspnav

media-gfx/openvdb

abi10-compat

Disables newer features to maintain compatibility with ABI10

abi11-compat

Disables newer features to maintain compatibility with ABI11

abi12-compat

Disables newer features to maintain compatibility with ABI12

abi8-compat

Disables newer features to maintain compatibility with ABI8

abi9-compat

Disables newer features to maintain compatibility with ABI9

alembic

Add support for Alembic through media-gfx/alembic.

ax

Build the OpenVDB AX module to perform custom manipulation of OpenVDB data via an expression language: AX

blosc

Allow using blosc compression via dev-libs/c-blosc

cuda

Enable support for CUDA in NanoVDB

nanovdb

A lightweight, header only, and GPU friendly version of VDB

numpy

Build pyopenvdb with support for dev-python/numpy

utils

Build utility binaries

media-gfx/photoqt

devil

Support additional image formats using media-libs/devil

freeimage

Support additional image formats using media-libs/freeimage

mpv

Support for video files using media-video/mpv

media-gfx/plantuml

ant-task

Provides classes used to manage PlantUML Ant task

media-gfx/potrace

metric

default to a4 paper size and metric measurement

media-gfx/povray

io-restrictions

POV-Ray's mechanism for control of I/O operations

media-gfx/pqiv

archive

Enable support for images in archives and cbX comic book files

media-gfx/pstoedit

emf

Enable media-libs/libemf support

pptx

Enable support for generating PowerPoint pptx files

media-gfx/qimgv

opencv

Enable HQ scaling via media-libs/opencv

video

Add support for gif/webm playback via libmpv

media-gfx/qrencode

png

Enable PNG output support in qrencode tool

media-gfx/renderdoc

qt5

Build and install the qrenderdoc GUI

media-gfx/shotwell

opencv

Enable face detection via media-libs/opencv

media-gfx/skanpage

ocr

Enable support for Optical Character Recognition via app-text/tesseract

media-gfx/solvespace

system-mimalloc

Use system dev-libs/mimalloc instead of vendored library

media-gfx/ueberzugpp

opencv

Use media-libs/opencv for additional image formats and OpenCL accelerated scaling

wayland

Enable wayland support (proper window positioning is only supported with some compositors)

xcb-errors

Use x11-libs/xcb-util-errors for better error reporting with X

media-gfx/xpaint

pgf

Support for loading PGF images

media-gfx/yafaray

fastmath

Enable mathematic approximations to make code faster

fasttrig

Enable trigonometric approximations to make code faster

opencv

Add support for media-libs/opencv image processing.

media-libs/a52dec

djbfft

Prefer D.J. Bernstein's library for fourier transforms

media-libs/allegro

dumb

Enable media-libs/dumb module library support

physfs

Enable physfs support

vga

Enables the VGA graphics driver

media-libs/alsa-lib

alisp

Enable support for ALISP (ALSA LISP) interpreter for advanced features.

media-libs/alure

dumb

Enable media-libs/dumb module library support

fluidsynth

Enables Fluidsynth MIDI software synthesis

media-libs/assimp

collada

Add support for Collada interchange format through media-libs/opencollada

samples

Build viewer library

media-libs/aubio

double-precision

Compile in double precision mode.

media-libs/avidemux-core

system-ffmpeg

Use the ffmpeg provided by the system.

media-libs/avidemux-plugins

aften

Enable A/52 (AC-3) audio encoder support.

amr

Enable Adaptive Multi-Rate format support via media-libs/opencore-amr.

dcaenc

Enable DTS Coherent Acoustics audio encoder support via media-sound/dcaenc.

fdk

Adds support for encoding AAC using media-libs/fdk-aac.

fribidi

Enable unicode bidirectional algorithm support via dev-libs/fribidi.

twolame

Enable TwoLAME support via media-sound/twolame, an optimised MPEG Audio Layer 2 (MP2) encoder.

vpx

Enable WebM VP8 Codec SDK support via media-libs/libvpx.

x265

Enables HEVC support with media-libs/x265.

media-libs/cal3d

16bit-indices

Enables use of 16bit indices

media-libs/chromaprint

tools

Build and install fpcalc and fpcollect tools

media-libs/clutter

gtk

Use gdk-pixbuf from x11-libs/gtk+ as image rendering backend

media-libs/cogl

kms

Enable KMS support.

pango

Build cogl-pango library for x11-libs/pango integration

media-libs/coin

exceptions

Compile with C++ exceptions

qch

Install API documentation in QCH format

media-libs/cubeb

sndio

Enable support for the media-sound/sndio backend

media-libs/dav1d

10bit

Add support for building 10-bit and 12-bit AV1.

8bit

Add support for decoding 8-bit AV1.

xxhash

Enable dev-libs/xxhash support for hashing muxer

media-libs/devil

allegro

Add support for Allegro

media-libs/dumb

allegro

Add support for Allegro 4

media-libs/embree

compact-polys

Enables double indexed poly layout.

ispc

Build Embree with support for ISPC applications.

raymask

Enables ray mask support.

ssp

When enabled, Embree compiles with stack protection against return address overrides. Stack protection will wield a minor performance decrease in return for higher security.

tbb

Use TBB instead of the built-in Embree tasking system.

tutorial

Enable to build Embree tutorials programs.

media-libs/esdl

image

Enable image support

media-libs/fcft

harfbuzz

Use media-libs/harfbuzz for grapheme and run shaping

libutf8proc

Use media-libs/harfbuzz and dev-libs/libutf8proc for run shaping

media-libs/flickcurl

raptor

Use media-libs/raptor for proper RDF serializing

media-libs/freetype

adobe-cff

Use Adobe CFF as default font-renderer

bzip2

Support bzip2 compressed PCF fonts.

cleartype-hinting

Bytecode hinting mode for TrueType fonts that activates subpixel hinting (a.k.a. ClearType hinting) by default

fontforge

Install internal headers required for TrueType debugger in media-gfx/fontforge (built with USE=truetype-debugger)

harfbuzz

Use media-libs/harfbuzz for auto-hinting OpenType fonts. WARNING: may trigger circular dependencies!

infinality

Enable infinality options for improved LCD filtering

utils

Install utilities and examples from ft2demos

media-libs/freeverb3

forcefpu

Disable assembly code

plugdouble

Build plugins in double precision mode (default is float)

media-libs/ganv

fdgl

Use experimental force-directed graph layout

media-libs/gegl

lensfun

Enable support for media-libs/lensfun.

sdl2

Add support for Simple Direct Layer 2.0 (media-libs/libsdl2)

umfpack

Enable sparse solving via sci-libs/umfpack.

media-libs/glew

egl-only

Enable EGL support and disable X11 support

media-libs/glfw

wayland-only

Enable wayland support and disable X11 support

media-libs/gmmlib

custom-cflags

Do not override user CFLAGS like -march, -msse and similar with lib defaults. Not tested by upstream.

media-libs/grilo

playlist

Enable support for playlists through dev-libs/totem-pl-parser

media-libs/gst-plugins-bad

bzip2

Enable bzip2 encoder/decoder plugin

media-libs/gst-plugins-base

gbm

Enable Graphics Buffer Manager based EGL windowing system support (requires egl and at least one of gles or opengl)

gles2

Enable OpenGL library and plugin via GLESv2 API (requires egl)

ivorbis

Enable integer based vorbis decoder

opengl

Enable OpenGL library and plugin via desktop OpenGL API

pango

Enable pango GStreamer plugin

wayland

Enable Wayland EGL windowing system support (requires egl and at least one of gles2 or opengl)

X

Enable ximagesink and xvimagesink plugins; build GLX platform support if USE=opengl is enabled; build x11 windowing system support if USE=egl is enabled

media-libs/gstreamer

unwind

Enable sys-libs/libunwind usage for better backtrace support in leaks tracer module

media-libs/harfbuzz

experimental

Enable experimental APIs

glib

Enable dev-libs/glib unicode functions

graphite

Enable media-gfx/graphite2 complementary shaper

media-libs/imlib2

apidoc

Provide doxygen generated API docs

bzip2

Bzip2 loader support

eps

Eps image loader support

filters

Build filter functions (blur, sharpen, etc)

heif

Heif and Avif image loader support

mp3

ID3 loader support

packing

Enable structure packing. This will reduce memory footprint at the cost of unaligned memory access

shm

Use MIT shared memory support for X image transfer

text

Build text (TrueType font) functions

X

Use the X window system

zlib

Zlib loader support

media-libs/intel-mediasdk

tools

Build analyse and inspect tools

media-libs/jasper

heif

Enable experimental support for HEIF/HEIC, unsupported by upstream

media-libs/leptonica

utils

Install command-line utilities

media-libs/lib3mf

system-act

Use system-provided dev-go/act as code generator instead of package provided binaries. This flag will be removed after some time used for testing!

media-libs/libafterimage

shaping

Use MIT shaped X windows extention.

shm

Use MIT shared memory extention for X image transfer.

media-libs/libao

sndio

Add support for media-sound/sndio

media-libs/libass

libunibreak

Use dev-libs/libunibreak for Unicode line breaking algorithm

media-libs/libavif

aom

Enable support for the AOM codec encoding and decoding

dav1d

Enable support for the dav1d codec decoding

extras

Build extra apps (avifenc, avifdec) and test files

gdk-pixbuf

Build a gdk-pixbuf loader

rav1e

Enable support for the rav1e codec encoding

svt-av1

Enable support for the SVT-AV1 encoder

media-libs/libbdplus

aacs

Add support for decryption of AACS

media-libs/libbluray

aacs

Add support for decryption of AACS

bdplus

Use media-libs/libbdplus for BD+ decryption

java

Add support for BD-J

utils

Install command-line utilities and examples

media-libs/libcanberra

alsa

Enables ALSA sound driver.

gstreamer

Enables gstreamer sound driver. Not useful when alsa or pulseaudio is available.

gtk2

Enables building of gtk+ helper library, gtk+ runtime sound effects and the canberra-gtk-play utility. To enable the gtk+ sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.

gtk3

Enables building of gtk+3 helper library, gtk+3 runtime sound effects and the canberra-gtk-play utility. To enable the gtk+3 sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.

pulseaudio

Enables PulseAudio sound driver that should be able to support positional event sounds. This is the preferred choice for best sound events experience and picked by default if compiled in and possible to use at runtime.

sound

Install x11-themes/sound-theme-freedesktop to get sounds on Gnome and Xfce.

tdb

Enables Trivial Database support for caching purposes.

media-libs/libde265

dec265

Enable build of dec265 example program

enc265

Enable build of enc265 tool

sdl

Enable video output of dec265 example program with media-libs/libsdl

tools

Enable installation of varous binary tools

media-libs/libffado

test-programs

Install standalone test programs

media-libs/libggi

3dfx

Enables support for Voodoo chipsets, also called 3DFX and TDFX

vis

Enables sparc vis support for libggi

media-libs/libgphoto2

serial

Enable serial port support

media-libs/libgpod

gtk

Enable ArtworkDB support

media-libs/libheif

aom

Use media-libs/libaom for AVIF encoding/decoding

gdk-pixbuf

Enable x11-libs/gdk-pixbuf plugin

go

Enable building dev-lang/go code/examples

rav1e

Use media-video/rav1e for AVIF encoding

svt-av1

Use media-libs/svt-av1 for SVT-AV1 encoding

webp

Enable high-quality YCbCr/RGB color space conversion algorithms

x265

Use media-libs/x265 for HEIF encoding

media-libs/libjxl

gdk-pixbuf

Build a gdk-pixbuf loader.

jpeg

Enable full support for JPEG images. When disabled, only lossless conversion between JPEG and JPEG-XL is supported.

media-libs/liblastfm

fingerprint

Build the lastfm-fingerprint library

media-libs/libmp4v2

utils

Install command-line utilities

media-libs/libmypaint

gegl

Add support for media-libs/gegl

media-libs/libopenglrecorder

openh264

Enable H.264 support using media-libs/openh264

vpx

Enable VP8/VP9 codec support via media-libs/libvpx

media-libs/libpagemaker

tools

Build command line file format conversion tools

media-libs/libpano13

suitesparse

Use Sparse Levenberg Marquardt algorithm instead of dense Levenberg Marquardt algorithm

media-libs/libplacebo

glslang

Use dev-util/glslang to compile GLSL

lcms

Add support for color management via media-libs/lcms

libdovi

Use media-libs/libdovi to read Dolby Vision metadata

shaderc

Use media-libs/shaderc to compile GLSL

xxhash

Use dev-libs/xxhash to speed up internal hashing

media-libs/libpng

apng

support unofficial APNG (Animated PNG) spec

media-libs/libprojectm

gles2

Provide support for OpenGL ES 2 and 3

media-libs/libpulse

asyncns

Use libasyncns for asynchronous name resolution.

doc

Build the doxygen-described API documentation.

glib

Add support to dev-libs/glib-based mainloop for the libpulse client library, to allow using libpulse on glib-based programs.

media-libs/libsdl

joystick

Control joystick support (disable at your own risk)

sound

Control audio support (disable at your own risk)

video

Control video support (disable at your own risk)

media-libs/libsdl2

fcitx

Enable support for app-i18n/fcitx

gles1

include OpenGL ES 1.0 support

haptic

Enable the haptic (force feedback) subsystem

ibus

Enable support for app-i18n/ibus

joystick

Control joystick support (disable at your own risk)

kms

Build the KMSDRM video driver

pipewire

Enable support for the media-video/pipewire audio backend

sndio

Enable support for the media-sound/sndio backend

sound

Control audio support (disable at your own risk)

video

Control video support (disable at your own risk)

media-libs/libshumate

sysprof

Enable sysprof-capture support for profiling

media-libs/libtgvoip

dsp

Enable signal processing (echo cancellation, noise suppression, and automatic gain control)

media-libs/libv4l

bpf

Enable support for IR BPF decoders

tracer

Build the v4l2-tracer tool and library

utils

Build the v4l-utils collection of utilities

media-libs/libva-compat

drm

Enables VA/DRM API support.

media-libs/libva-intel-driver

hybrid

Enable support for hybrid vaapi hardware acceleration on Intel Haswell and newer architectures

media-libs/libva-intel-media-driver

redistributable

Install redistributable media kernel binaries (no source code) files (primarily needed for video encoding support)

media-libs/libvisio

tools

Build conversion tools

media-libs/libvmaf

embed-models

Compile default vmaf models into the library (needs app-editors/vim-core)

media-libs/libvpl-tools

drm

Build with DRM support

media-libs/libvpx

highbitdepth

Enable 10 and 12 bit support for VP9.

postproc

Enable additional post processing filters

media-libs/libwebp

swap-16bit-csp

Enable byte swapping for 16 bit colorspace

media-libs/libzmf

tools

Build conversion tools

media-libs/lilv

tools

Build command line utilities

media-libs/lsp-plugins

lv2

Build lv2 plugins

vst

Support LinuxVST plugins

media-libs/lv2

plugins

Enables examples plugins.

media-libs/lvtk

gtk2

Enable x11-libs/gtk+:2 based GUI support

tools

Compile and install ttl2c tool

media-libs/mesa

d3d9

Enable Direct 3D9 API through Nine state tracker. Can be used together with patched wine.

llvm

Enable LLVM backend for Gallium3D.

lm-sensors

Enable Gallium HUD lm-sensors support.

opencl

Enable the Rusticl Gallium OpenCL state tracker.

osmesa

Build the Mesa library for off-screen rendering.

proprietary-codecs

Enable codecs for patent-encumbered audio and video formats.

vdpau

Enable the VDPAU acceleration interface for the Gallium3D Video Layer.

vulkan-overlay

Build vulkan-overlay-layer which displays Frames Per Second and other statistics

wayland

Enable support for dev-libs/wayland

xa

Enable the XA (X Acceleration) API for Gallium3D.

media-libs/mesa-amber

gles1

Enable GLESv1 support.

wayland

Enable support for dev-libs/wayland

media-libs/mlt

frei0r

Build the module for media-plugins/frei0r-plugins

opencv

Build motion tracking module using media-libs/opencv

python

Build SWIG bindings for Python

rtaudio

Builds rtaudio consumer for native audio support on multiple platforms

rubberband

Enable audio pitch-shifting using media-libs/rubberband

vidstab

Enabled video stabilization with media-libs/vidstab

media-libs/netpbm

rle

Build converters for the RLE format (utah raster toolkit)

media-libs/noise-suppression-for-voice

lv2

Enable the LV2 plugin

vst

Enable the VST plugin

vst3

Enable the VST3 plugin

media-libs/oidn

apps

Build the standalone denoise, self test, and benchmark binaries.

hip

Build OIDN with AMD HIP support.

openimageio

Enable OpenImageIO Support

media-libs/oneVPL-cpu

openh264

Use media-libs/openh264 instead of media-libs/x264

media-libs/openal

pipewire

Enable support for the media-video/pipewire audio backend

sndio

Enable support for the media-sound/sndio backend

media-libs/opencolorio

apps

Build the OCIO command line apps

media-libs/opencv

atlas

Use sci-libs/atlas for blas, lapack and sparse blas routines (Experimental!)

contrib

Install user contributed scripts from opencv_contrib (Experimental!)

contribcvv

Enable CVV in contrib (requires Qt5)

contribdnn

Enable DNN module contrib (requires tinydnn)

contribfreetype

Enable Drawing UTF-8 strings with media-libs/freetype&media-libs/harfbuzz

contribhdf

Enable HDF module (requires sci-libs/hdf5)

contribovis

Enable OGRE vision module support (dev-games/ogre)

contribsfm

Enable SFM module (requires USE="eigen gflags glog")

contribxfeatures2d

Enables xfeatures2d and autodownload of samples in contrib

cuda

Enable NVIDIA Cuda computations support (Experimental!)

cudnn

Enable support for nVidia cuDNN library

dnnsamples

Enable dnn caffeemodel samples

eigen

Enable usage of dev-cpp/eigen for computations

features2d

Enable features2d module

gdal

Enable support for sci-libs/gdal library

gflags

Use Google's C++ argument parsing library (dev-cpp/gflags)

glog

Use Google's C++ logging library (dev-cpp/glog)

gtk3

Enable x11-libs/gtk+:3 support

jasper

Use media-libs/jasper for jpeg2k support

mkl

Use sci-libs/mkl for blas, lapack and sparse blas routines

non-free

Enable non-free components

opencvapps

Enable compilation with opencvapps

quirc

Enable qrcode decoding via media-libs/quirc

tbb

Enable multithreading with the Intel Threads Building Block (dev-cpp/tbb)

tesseract

Use Google's OCR Engine

testprograms

Build and install programs for testing OpenCV (performance)

truetype

Enable media-libs/freetype support for gapi module

video_cards_intel

Enable Video Acceleration API for hardware decoding for Intel cards

vtk

Build new 3D visualization module viz based on sci-libs/vtk

media-libs/openexr

large-stack

Enables code to take advantage of large stack support.

utils

Build several binary tools for verifying and manipulating EXR files.

media-libs/openh264

plugin

Install the Gecko Media Plugin (GMP) for use with Mozilla packages

utils

Install the CLI encoder and decoder utilities

media-libs/openimageio

dicom

Enable DICOM medical image file support via sci-libs/dcmtk

fits

Enable support for NASA's sci-libs/cfitsio library

gui

Build iv (with Qt5)

opencv

Enable OpenCV support via media-libs/opencv

openvdb

Enable OpenVDB support via media-gfx/openvdb

ptex

Enable Ptex texture mapping system file support via media-libs/ptex

qt6

Build iv with Qt6

tools

Build the command-line tools

media-libs/opensubdiv

glew

Enable support for OpenGL Extension Wrangler Library (media-libs/glew)

glfw

Build all example files that uses (media-libs/glfw)

ptex

Adds support for faster per-face texture mapping through media-libs/ptex

python

Use dev-lang/python to process source and documentation source files

tbb

Enable multithreading with the Intel Threads Building Blocks through dev-cpp/tbb

tutorials

Install the tutorials

media-libs/opus

custom-modes

Enable non-Opus modes, e.g. 44.1 kHz and 2^n frames

deep-plc

Enable Deep Packet Loss Concealment (PLC)

dred

Enable Deep REDundancy (DRED)

osce

Enable Opus Speech Coding Enhancement (OSCE)

media-libs/opusfile

fixed-point

Enable fixed-point arithmetic operations

float

Enable floating point arithmetic operations

http

Enable http connections

media-libs/osl

gui

Build the osltoy binary (with Qt5)

libcxx

Build against llvm-runtimes/libcxx when using clang

nofma

Do not use Fuse-Multiply-Add operations

optix

Add support for NVIDIA's OptiX Raytracing Engine

partio

Use media-libs/partio

qt6

Build the osltoy binary (with Qt6)

media-libs/phonon

designer

Install plugin for dev-qt/designer

media-libs/portmidi

test-programs

Install various example programs

media-libs/quarter

designer

Install plugin for dev-qt/designer

qch

Install API documentation in QCH format

media-libs/quirc

opencv

Build tools requiring media-libs/opencv (inspect-opencv,quirc-demo-opencv)

sdl

Build tools requiring media-libs/sdl-gfx (inspect, quirc-demo)

tools

Build tools (qrtest)

v4l

Build tools for webcams (quirc-scanner)

media-libs/raptor

json

Enable support for JSON parsing

media-libs/raspberrypi-userland-bin

hardfp

Use armv6 hardfp ABI

media-libs/roc-toolkit

tools

Install helper tools like roc-conv, roc-recv, roc-send

media-libs/rubberband

jni

Enables building of Java Native Interface library

lv2

Add support for Ladspa V2

programs

Builds also executable applications

vamp

Enables vamp plugins support (Audio analysing plugins)

media-libs/sdl2-mixer

fluidsynth

Use media-sound/fluidsynth for MIDI support

gme

Support additional music formats with media-libs/game-music-emu

midi

Basic support for MIDI files

mod

Basic support for MOD files

modplug

Support MOD via media-libs/libmodplug

playtools

Install playwave and playmus tools (useful for testing)

stb

Use dev-libs/stb instead of media-libs/libvorbis for OGG Vorbis support

tremor

Use media-libs/tremor instead of media-libs/libvorbis for OGG Vorbis support

wav

Support WAVE files

wavpack

Support WavPack files

xmp

Support MOD via media-libs/libxmp

media-libs/sdl2-ttf

harfbuzz

Use media-libs/harfbuzz for enhanced font rendering

media-libs/sdl_audiolib

fluidsynth

Enable support for MIDI via media-sound/fluidsynth

mpg123

Enable support for mp3 decoding via media-sound/mpg123

openmpt

OpenMPT decoder via media-libs/libopenmpt

soxr

Enable SoX Resampler support via media-libs/soxr

wildmidi

Enable support for MIDI via media-sound/wildmidi

media-libs/sdl-mixer

fluidsynth

Use media-sound/fluidsynth for MIDI support

midi

basic support for MIDI files

mod

basic support for MOD files

playtools

Install playwave and playmus tools (useful for testing)

smpeg

Use media-libs/smpeg for MP3 support

wav

support WAVE files

media-libs/sge

image

enable sdl-image support

media-libs/spandsp

fixed-point

Enable fixed point support

media-libs/speex

utils

Enables speex commandline utilities (speexenc, speexdec).

vbr

Enable VBR support.

media-libs/suil

gtk2

Enable GTK2 based GUI support

media-libs/svgalib

kernel-helper

Build the helper kernel module

media-libs/tremor

low-accuracy

enable 32bit only multiply operations

media-libs/urt

tools

Install tools

media-libs/vips

archive

Enable support for compressed files using app-arch/libarchive

deprecated

Enable deprecated components

fits

Enable support for the Flexible Image Transport System data format using sci-libs/cfitsio

highway

Enable SIMD optimizations using dev-cpp/highway (replaces USE=orc)

imagequant

Enable support for Image Quantization using media-gfx/libimagequant

matio

Enable support for matlab files using sci-libs/matio

pango

Enable support for text rendering using x11-libs/pango

media-libs/vulkan-loader

layers

Include the vulkan layers

media-libs/waffle

wayland

Enable Wayland support

media-libs/x264

interlaced

enable interlaced encoding support, this can decrease encoding speed by up to 2%

pic

disable optimized assembly code that is not PIC friendly

media-libs/x265

10bit

Add support for producing 10bits HEVC.

12bit

Add support for producing 12bits HEVC.

numa

Build with support for NUMA nodes.

media-libs/xine-lib

bluray

Enable playback of Blu-ray filesystems using media-libs/libbluray

dav1d

Enable support for media-libs/dav1d AV1 decoder

dxr3

Enable support for DXR3 mpeg acceleration cards.

flac

Build the media-libs/flac based FLAC demuxer and decoder. This flag is not needed for playing FLAC content, neither standalone nor in Ogg container (OggFLAC), but might have better support for exotic features like 24-bit samples or 96kHz sample rates.

gtk

Build the gdkpixbuf-based image decoder plugin.

imagemagick

Build the ImageMagick-based image decoder plugin.

mad

Build the media-libs/libmad based mp3 decoder. This mp3 decoder has superior support compared to the one coming from FFmpeg that is used as a fallback. If you experience any bad behaviour with mp3 files (skipping, distorted sound) make sure you enabled this USE flag.

mmap

Use mmap() function while reading file from local disks. Using mmap() will use more virtual memory space, but leaves to the Kernel the task of caching the file's data. mmap() access should be faster, but might misbehave if the device where the file resides in is removed during playback.

nfs

Allow accessing NFS shares via net-fs/libnfs.

sftp

Use net-libs/libssh2 to access SFTP servers.

truetype

Use media-libs/freetype for font rendering and media-libs/fontconfig for font discovery. Enabling this USE flag will allow OSD (such as subtitles) to use more advanced font and to more easily select which font to use. The support for TrueType fonts in xine-lib is still experimental, and might not be as good looking as the bitmap fonts used with this USE flag disabled.

vdr

Build the VDR plugin

vidix

Enable support for vidix video output.

vis

Adds support for SIMD optimizations for UltraSPARC processors.

vpx

Enable VP8 codec support via media-libs/libvpx.

xvmc

Enable support for XVideo Motion Compensation (accelerated mpeg playback).

media-libs/zita-resampler

tools

Install zresample and zretune tools

media-libs/zmusic

fluidsynth

Enable support for MIDI via media-sound/fluidsynth

mpg123

Enable support for MPEG audio playback via media-sound/mpg123

media-plugins/alsa-plugins

arcam_av

Enables Arcam AV control plugin

mix

Enables upmix and vdownmix plugin

usb_stream

Enables usb_stream plugin

media-plugins/audacious-plugins

ampache

Support controlling audacious via ampache

bs2b

Enable Bauer Bauer stereophonic-to-binaural headphone filter

cue

Support CUE sheets using the libcue library

fluidsynth

Support FluidSynth as MIDI synth backend

gme

Support various gaming console music formats

http

Support HTTP streams through neon

openmpt

Add support for OpenMPT

pipewire

Build the PipeWire output plugin

scrobbler

Build with scrobbler/LastFM submission support

soxr

Build with SoX Resampler support

speedpitch

Enable speed/pitch effects

streamtuner

Build the streamtuner plugin

media-plugins/calf

experimental

Enable experimental features/plugins

lv2

Add support for Ladspa V2

media-plugins/frei0r-plugins

facedetect

Enables building of facedetect plugin, which depends on media-libs/opencv

scale0tilt

Enables building of scale0tilt and vectorscope plugins, which depend on media-libs/gavl

media-plugins/gkrellmpc

threads

Use separate thread to init connection (unsafe)

media-plugins/grilo-plugins

chromaprint

Enable Chromaprint support

daap

Enable dmap support through net-libs/libdmapsharing

flickr

Enable Flickr support

freebox

Build support for viewing TV channels using Freebox

gnome-online-accounts

Enable net-libs/gnome-online-accounts support

thetvdb

Build support for thetvdb.com

tracker

Build support for content discovery using the app-misc/tracker indexer

youtube

Build support for YouTube content discovery using dev-libs/libgdata

media-plugins/gst-plugins-gtk

gles2

Enable gtkglsink OpenGL sink based on GLESv2 API

opengl

Enable gtkglsink OpenGL sink based on desktop OpenGL API

media-plugins/gst-plugins-meta

http

Enable http streaming via net-libs/libsoup

libvisual

Enable visualization effects via media-libs/libvisual

vpx

Enables vp8 codec support using libvpx, required to play some HTML5 videos

media-plugins/gst-plugins-vaapi

drm

Enable DRM renderer

gles2

Enable GLESv2 and GLESv3 support

media-plugins/imlib2_loaders

xcf

Enable XCF image loader

media-plugins/ir_lv2

tools

Build convert4chan tool

media-plugins/mpg123-output-plugins

int-quality

Use rounding instead of fast truncation for integer output, where possible

media-plugins/vdr-cdplayer

cdparanoia

Enable cdparanoia (audio CD ripper) support

media-plugins/vdr-dvbapi

dvbcsa

use media-libs/libdvbcsa free implementation of the DVB Common Scrambling Algorithm

media-plugins/vdr-epgsearch

conflictcheckonly

install the "conflictcheckonly" vdr-plugin

epgsearchonly

install the "epgsearchonly" vdr-plugin

quicksearch

install the "quicksearch" vdr-plugin

tre

Add support for unlimited fuzzy searching with help of dev-libs/tre library

media-plugins/vdr-streamdev

client

Compile the VDR plugin vdr-streamdev-client that can connect a vdr to a remote streamdev-server instance

server

Compile the VDR plugin vdr-streamdev-server that allows remote systems to access the vdr using streamdev-specific VTP and HTTP protocol

media-plugins/vdr-vdrmanager

stream

Add support for streaming Video to Android client

media-plugins/vdr-weatherng

dxr3

enables lower osd color depth for dxr3 cards

media-plugins/vdr-xineliboutput

bluray

Enable BluRay metadata support through media-libs/libbluray

cec

Enable CEC support through dev-libs/libcec

vdr

Compile the vdr output plugin to use local or remote xine as output

xine

Compile the xine input plugin for displaying vdr video and OSD

media-radio/ax25-tools

X

Enable some X based configuration tools.

media-radio/chirp

radioreference

pull in optional deps for query of radioreference

media-radio/direwolf

hamlib

Enables support by the Hamlib amateur radio rig control library

media-radio/fldigi

hamlib

Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio in use

media-radio/svxlink

qt5

Build and install qtel application

rtlsdr

Add support for rtlsdr hardware

media-radio/tucnak

hamlib

Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio

rtlsdr

Add support for rtlsdr hardware

media-radio/unixcw

ncurses

Enables building the curses based morse code tutor program 'cwcp'.

media-radio/xastir

geotiff

Install geotiff support. Allows using USGS DRG topo maps or other types of geotiff mapes/images

media-sound/abcde

aiff

Enable support for Audio Interchange File Format (AIFF) output encoding

id3tag

Support ID3, ID3v2 tagging of audio files

mac

Enable support for Monkey's Audio files

normalize

Add support for normalizing audio file volume levels

replaygain

Support for Replay Gain metadata, for relative volume adjustment

media-sound/abcm2ps

pango

Use the pango library to render fonts with non-latin characters

media-sound/alsaplayer

id3tag

Enables ID3 tagging with id3tag library

media-sound/alsa-utils

bat

install basic audio tester (BAT) util

libsamplerate

install utils that use libsamplerate (e.g. alsaloop)

ncurses

install utils that use ncurses (e.g. alsamixer)

media-sound/amsynth

dssi

Enable support for DSSI Soft Synth Interface

lv2

Add support for Ladspa V2

nsm

Build support for Non Session Manager

vst

Build VST plug-in

media-sound/apulse

sdk

Install PulseAudio headers and pkg-config files. Be aware apulse is not a full PulseAudio replacement by design and some functionality may be missing.

media-sound/aqualung

ifp

Enable support for iRiver iFP portable audio players

lua

Enable support for programmable title formatting with dev-lang/lua

mac

Enable support for decoding Monkey's Audio files

podcast

Enable podcast support

systray

Enable system tray support

media-sound/ardour

phonehome

contact ardour.org at startup for new announcements

media-sound/ario

idle

Enable experimental support for MPD's idle command to reduce bandwidth and cpu usage, requires MPD 0.14

media-sound/asunder

mac

Support for creation of Monkey's Audio files (APE)

media-sound/audacity

audiocom

Enable integrated uploading to audio.com

id3tag

Enables ID3 tagging with id3tag library

lv2

Add support for Ladspa V2

mpg123

Use media-sound/mpg123-base instead of media-libs/libmad for MPEG decoding

portmixer

Enable the internal portmixer feature

sbsms

Enables sbsms library support for slower, more accurate pitch and tempo changing

twolame

Enables twolame support (MPEG Audio Layer 2 encoder)

vamp

Enables vamp plugins support (Audio analysing plugins)

media-sound/audiotools

cue

Enable CUE sheet support

dvda

Enable DVD-Audio support

twolame

Enable twolame support (MPEG Audio Layer 2 encoder)

media-sound/bluez-alsa

aptx

aptX (HD) over Bluetooth (many Android compatible headphones)

hcitop

Enable top-like monitoring tool for HCI

ldac

Enable support for AOSP media-libs/libldac dispatcher

liblc3

Enable LC3-SWB audio support for HFP

mpg123

Enable support for MPEG audio playback via media-sound/mpg123

msbc

Enable mSBC audio support for HFP

ofono

Enable oFono telephony support

media-sound/cadence

a2jmidid

Enables support for legacy ALSA sequencer applications in JACK MIDI system

media-sound/cantata

cdio

Use dev-libs/libcdio-paranoia for CD support (instead of cdparanoia)

http-server

Enable internal HTTP server to play non-MPD files

replaygain

Enable ReplayGain support, for relative volume adjustments

streaming

Enable playback of MPD HTTP streams using LibVLC (media-video/vlc)

media-sound/cava

pipewire

Enable support for the media-video/pipewire backend

sndio

Enable support for the media-sound/sndio backend

media-sound/clementine

box

Enable filesharing via Box.com

dropbox

Enable Dropbox support

googledrive

Enable Google Drive support

lastfm

Use liblastfm for fetching song info, scrobbling and radio streams

moodbar

Enable moodbar support

projectm

Build with ProjectM visualization

seafile

Enable support for seafile: a file sync service

skydrive

Enable Skydrive support

wiimote

Enable support for Wii remote

media-sound/cmus

cdio

Use libcdio for CD support

discid

Enable reading the ID of the inserted CD

elogind

Enable MPRIS support via sys-auth/elogind

pidgin

Install support script for net-im/pidgin

sndio

Add support for media-sound/sndio

systemd

Enable MPRIS support via sys-apps/systemd

tremor

Use libivorbis from media-libs/tremor instead of media-libs/libvorbis

media-sound/csound

beats

Build the beats score frontend

double-precision

Use double-precision floating point for audio samples

dssi

Build the DSSI opcodes

portmidi

Build the PortMIDI I/O module

samples

Install the HRTF datafiles for use with hrtfmove, hrtfmove2, hrtfstat, hrtfearly, and hrtfreverb

utils

Build stand-alone executables for utilities that can also be used via `csound -U`

media-sound/darkice

twolame

Build with twolame support

media-sound/deadbeef

converter

File format converter

cover

Support for cover art

hotkeys

Keyboard shortcuts support

lastfm

last.fm/AudioScrobbler protocol support

libretro

libretro resampling plugin

libsamplerate

Support the Secret Rabbit Code resampler

notify

Desktop notifications support

nullout

Dummy output driver

pipewire

Pipewire output plugin

sc68

Atari ST and Amiga music player

shellexec

Define custom shell commands that can be called on tracks

supereq

Enable equalizer

media-sound/denemo

alsa

Enable alsa support through media-libs/alsa-lib

aubio

Enable media-libs/aubio support

jack

Enable jack support through virtual/jack

portaudio

Enable support for media-libs/portaudio

portmidi

Enable support for the media-libs/portmidi backend

rubberband

Enable support for media-libs/rubberband

media-sound/dir2ogg

mac

Add support for decoding Monkey's Audio files

wma

Add support for wma files through mplayer

media-sound/drumstick

fluidsynth

Enable support for media-sound/fluidsynth

media-sound/easyeffects

calf

Enable use of media-plugins/calf for adding various FX

doc

Install packages needed to display built-in user documentation

mda-lv2

Enable use of media-plugins/mda-lv2 for the loudness FX

zamaudio

Enable use of media-plugins/zam-plugins for the maximizer FX

media-sound/ecasound

lv2

Add support for Ladspa V2

oil

Use dev-libs/liboil for inner loop optimizations

media-sound/elisa

mpris

Enable MPRIS support

vlc

Use media-video/vlc for output rather than dev-qt/qtmultimedia

media-sound/fapg

xspf

Enable support for saving XSPF playlists.

media-sound/fluidsynth

network

enable network support (requires BSD sockets)

pipewire

enable media-video/pipewire support

media-sound/gimmix

cover

Enable cover art fetching

lyrics

Enable lyric fetching

media-sound/guitarix

lv2

Build lv2 plugins

nsm

Build NSM (Non Session Manager) support

standalone

Build standalone application

media-sound/hydrogen

archive

Use libarchive instead of libtar

portmidi

Add portmidi support

media-sound/jack2

classic

Enable building of jackd

metadata

Enable metadata API

pam

Add basic realtime configuration via sys-auth/realtime-base

tools

Pull basic tools (e.g. jack_lsp/connect) from media-sound/jack-example-tools

media-sound/jack-audio-connection-kit

pam

Add basic realtime configuration via sys-auth/realtime-base

media-sound/jack-example-tools

jack-net

Build jack_net_* example clients

jack-netsource

Build jack_netsource for configuring network sources

zalsa

Build the zalsa internal client using media-libs/zita-resampler

media-sound/kasts

vlc

Enable media-video/vlc backend

media-sound/kid3

acoustid

Build acoustic fingerprinting plugin using media-libs/chromaprint

mpris

Enable support for MPRIS2 interface using dev-qt/qtdbus

media-sound/klick

rubberband

Enable rubberband support

media-sound/lame

frontend

Build and install the 'lame' executable frontend to lame libraries.

mp3rtp

Build the mp3-to-RTP streaming utility. **UNSUPPORTED**

media-sound/liblc3

tools

Enable extra tools

media-sound/linuxsampler

lv2

Add support for Ladspa V2

sf2

Add support for SoundFont 2 sound bank files

media-sound/linux-show-player

midi

Allow cues to send, or trigger on, MIDI messages

timecode

Support the sending of time code of running audio files over ArtNet, for instance to trigger cues in lighting-control software on lighting desks

media-sound/lmms

fluidsynth

Enables Fluidsynth MIDI software synthesis plugin.

libgig

Enables GIG player plugin.

soundio

Enables libsoundio support.

stk

Enables STK Mallet plugin.

vst

Enables the VeSTige plugin to run VST plugins through Wine.

media-sound/mangler

espeak

Text to speech engine

g15

Logitech g15 lcd support

media-sound/mixxx

hid

Enable HID controller support

keyfinder

Enable musical key detection support via media-libs/libkeyfinder

lv2

Add support for Ladspa V2 via media-libs/lilv

modplug

Add libmodplug support

qtkeychain

Enable Secure credential storage support via dev-libs/qtkeychain

shout

Enable broadcasting support via media-libs/libshout

media-sound/moc

cache

Enable tags caching support

sndio

Enable support for the media-sound/sndio backend

tremor

Build vorbis support using an integer implementation of the vorbis library (media-libs/tremor)

media-sound/mpd

cdio

Use libcdio for ISO9660 parsing support

chromaprint

Enable ChromaPrint / AcoustID support

cue

Enable CUE sheet support

curl

Support for web stream listening

eventfd

Use the eventfd function in MPD's event loop

faad

Use external faad library for AAC decoding

fifo

Support writing audio to a FIFO

fluidsynth

Enables Fluidsynth MIDI software synthesis (discouraged)

gme

Enables support for media-libs/game-music-emu for playing various video game music formats.

id3tag

Support for ID3 tags

inotify

Use the Linux kernel inotify subsystem to notice changes to mpd music library

io-uring

Enable support for io_uring

lame

Support for MP3 streaming via Icecast2

libmpdclient

Enable support for remote mpd databases

libsoxr

Enable the libsoxr resampler

mpg123

Enable support for mp3 decoding over media-sound/mpg123

network

Enables network streaming support

nfs

Enable support for the Network File System

openmpt

OpenMPT decoder plugin

pipe

Support writing audio to a pipe

pipewire

PipeWire support

qobuz

Build plugin to access qobuz

recorder

Enables output plugin for recording radio streams

signalfd

Use the signalfd function in MPD's event loop

snapcast

Snapcast audio plugin

sndio

Enable support for the media-sound/sndio backend

soundcloud

Build plugin to access soundcloud

systemd

Enable support for systemd socket activation

twolame

Support twolame MPEG-2 encoding

webdav

Enable using music from a WebDAV share

wildmidi

Enable MIDI support via wildmidi

yajl

Enable JSON parsing via dev-libs/yajl

media-sound/mpfc

wav

Enable wav audio codec support

media-sound/mpg123

int-quality

Use rounding instead of fast truncation for integer output, where possible

media-sound/mpg123-base

int-quality

Use rounding instead of fast truncation for integer output, where possible

media-sound/musescore

omr

Enable PDF import (OMR - optical music recognition)

osc

Enable OSC remote control protocol

portmidi

Enable support for building against media-libs/portmidi

sf3

Enable SoundFont 3 support using media-libs/libvorbis

sfz

Enable experimental SFZ sampler

video

Support exporting scores as videos using the command line

webengine

Use dev-qt/qtwebengine for embedded web browser

media-sound/ncmpc

async-connect

Enable asynchronous connect

chat-screen

Enable the chat screen

help-screen

Enable the help screen

key-screen

Enable key editor screen

library-screen

Enable library screen

lyrics-screen

Enable lyrics screen

mouse

Enable curses getmouse support

outputs-screen

Enable the outputs screen

search-screen

Enable search screen

song-screen

Enable song viewer screen

media-sound/ncmpcpp

clock

Enable clock screen

outputs

Enable outputs screen

visualizer

Enable visualizer screen with sound wave/frequency spectrum modes

media-sound/ncspot

clipboard

Use the system clipboard to e.g. share a link

cover

Support displaying the album cover

mpris

Allow ncspot to be controlled via MPRIS API

ncurses

Use cursive/ncurses-backend instead of crossterm or pancurses

notify

Show what's playing via a notification

media-sound/owntone

chromecast

build and install Chromecast support

media-sound/patchage

jack-dbus

Use Jack via D-Bus instead of libjack

media-sound/picard

discid

Enable reading the ID of the inserted CD

fingerprints

Enable calculation and lookup of AcoustID fingerprints

media-sound/pithos

keybinder

Use keybinder to enable global key bindings

media-sound/pms

regex

Enable regular expression searches

media-sound/puddletag

acoustid

Use media-libs/chromaprint for acoustic fingerprinting

quodlibet

Enables support for editing media-sound/quodlibet databases

media-sound/pulseaudio

daemon

Build the pulseaudio binary (not-needed for pipewire-pulse)

glib

Add support to dev-libs/glib-based mainloop for the libpulse client library, to allow using libpulse on glib-based programs. Build the GSettings PA module.

ofono-headset

Build with oFono HFP backend for bluez 5, requires net-misc/ofono.

media-sound/pulseaudio-daemon

alsa-plugin

Request installing media-plugins/alsa-plugins with PulseAudio plugin enabled. This ensures that clients supporting ALSA only will use PulseAudio.

aptx

aptX (HD) over Bluetooth (many Android compatible headphones), requires media-plugins/gst-plugins-openaptx.

asyncns

Use libasyncns for asynchronous name resolution.

elogind

Use sys-auth/elogind for giving each session a PA client

equalizer

Enable the equalizer module (requires sci-libs/fftw and sys-apps/dbus).

fftw

Enable the virtual surround sink module (requires sci-libs/fftw).

gdbm

Use sys-libs/gdbm to store PulseAudio databases. Recommended for desktop usage. This flag causes the whole package to be licensed under GPL-2 or later.

glib

Build the GSettings PA module.

gstreamer

Build GStreamer-based RTP protocol module which supports more advanced RTP features like OPUS payload encoding.

ldac

LDAC over Bluetooth (primarily Sony headphones), requires media-plugins/gst-plugins-ldac.

ofono-headset

Build with optional oFono HFP backend for bluez 5, requires net-misc/ofono.

oss

Enable OSS sink/source (output/input). Deprecated, upstream does not support this on systems where other sink/source systems are available (i.e.: Linux). The padsp wrapper is now always build if the system supports OSS at all.

ssl

Use dev-libs/openssl to provide support for RAOP (AirPort) streaming.

systemd

Build with sys-apps/systemd support to replace standalone ConsoleKit.

system-wide

Allow preparation and installation of the system-wide init script for PulseAudio. Since this support is only supported for embedded situations, do not enable without reading the upstream instructions at https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/WhatIsWrongWithSystemWide/ .

webrtc-aec

Uses the webrtc.org AudioProcessing library for enhancing VoIP calls greatly in applications that support it by performing acoustic echo cancellation, analog gain control, noise suppression and other processing.

X

Build the X11 publish module to export PulseAudio information through X11 protocol for clients to make use. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag.

media-sound/pulseeffects

bs2b

Enable use of media-libs/libbs2b for the crossfeed FX

calf

Enable use of media-plugins/calf for adding various FX

doc

Install packages needed to display built-in user documentation

rnnoise

Enable use of media-libs/rnnoise for the neural network-based noise-reduction FX

rubberband

Enable use of media-libs/rubberband for the pitch-shifting FX

webrtc

Enable use of media-plugins/gst-plugins-webrtc for various voice-enhancement FX

zamaudio

Enable use of media-plugins/zam-plugins for the maximizer FX

media-sound/qmidiarp

lv2

Enables Ladspa V2 plugins.

media-sound/qmmp

analyzer

Enable visual analyzer

archive

Enable archiving plugin via app-arch/libarchive.

bs2b

Enable Bauer stereophonic-to-binaural headphone filter

cover

Enable album cover support

crossfade

Enable crossfade effect when switching tracks

cue

enable CUE sheet parsing

dbus

Enable DBus notifiications and MPRIS support

enca

Detects the character encoding automatically

game

Enable Game music support

gnome

Enable Gnome hotkey support (requires Qt5DBus)

lyrics

Fetch track lyrics from the web

midi

Enable midi support using wildmidi library

notifier

Enable qmmps' notifier system

pipewire

Enable PipeWire output plugin

projectm

Enable projectm music visualization plugin

qsui

Enable QMMP simple UI

qtmedia

Enable playback via dev-qt/qtmultimedia

scrobbler

Enable audioscrobbler/last.fm support

shout

Enable shoutcast plug-in via media-libs/libshout.

sndfile

Enable wav playback support via media-libs/libsndfile

soxr

Use the SoX resampling library

stereo

Enable stereo effect

tray

Build tray icon

xmp

Enable module files renderer (modplug replacement)

media-sound/qsampler

libgig

Enable libgig support for loading Gigasampler files and DLS (Downloadable Sounds) Level 1/2 files

media-sound/qtractor

aubio

Enable media-libs/aubio support

dssi

Enable support for DSSI Soft Synth Interface

rubberband

Enable support for in-place audio clip pitch-shifting through the rubberband library

media-sound/rhythmbox

daap

Build the local network music sharing plugin which uses the DAAP protocol using net-libs/libdmapsharing

media-sound/scream

pcap

Support sniffing packets from network using net-libs/libpcap

media-sound/shntool

alac

Add support for Apple Lossless Audio Codec files

mac

Add support for Monkey's Audio files

shorten

Add support for the shorten audio compressor

media-sound/snapcast

client

Build and install Snapcast client component

server

Build and install Snapcast server component

tremor

Build with TREMOR version of vorbis

media-sound/snd

notcurses

Terminal interface via dev-cpp/notcurses

s7

Enable the s7 extension language (a version of Scheme)

media-sound/sonic-visualiser

id3tag

Enables ID3 tagging with id3tag library

media-sound/sox

amr

Enables Adaptive Multi-Rate Audio support

id3tag

Enables ID3 tagging with id3tag library

sndio

Enable support for sndio

twolame

Enables twolame support (MPEG Audio Layer 2 encoder)

media-sound/split2flac

enca

Try to guess the charset using enca

flake

Add support for Flake, alternative FLAC encoder

mac

Add support for Monkey's Audio files

replaygain

Support for Replay Gain metadata, for relative volume adjustment

media-sound/spotify

local-playback

Allows playing local files with the Spotify client

pax-kernel

Triggers a paxmarking of the main Spotify binary

pulseaudio

Controls the dependency on pulseaudio or apulse

media-sound/strawberry

chromaprint

Enables audio fingerprinting support with media-libs/chromaprint

loudness

Enable loudness normalisation according to the EBU R128 standard using media-libs/libebur128

moodbar

Enable moodbar support

soup

Allow streaming with media-plugins/gst-plugins-soup

streaming

Enable Online Streaming Support

vlc

Enable media-video/vlc backend

media-sound/supercollider

ableton-link

Enable support for Ableton Link

emacs

Enable the SCEL user interface

gedit

Enable the SCED user interface

gpl3

Build GPL-3 licensed code (recommended)

server

Build with internal server

vim

Enable the SCVIM user interface

webengine

Enable the internal help system using QtWebengine

media-sound/teamspeak-client

system-libcxx

Use llvm-runtimes/libcxx instead of shipped libs.

system-quazip

Use dev-libs/quazip instead of shipped libs.

media-sound/teamspeak-server

tsdns

Install TeamSpeaks own DNS service for handling multiple virtual servers.

media-sound/upmpdcli

thirdparty

Enable streaming from Qobuz and Tidal external services

media-sound/vimpc

boost

Use boost instead of C++11 libraries

media-sound/vorbis-tools

kate

Adds support for Ogg Kate subtitles via libkate.

ogg123

Build ogg123 player, needs libao and curl

media-sound/wildmidi

player

Install the wildmidi player

sndio

Enable support for the media-sound/sndio backend

media-sound/xmms2

airplay

Support for airplay format

fluidsynth

Enable fluidsynth support (MIDI)

gme

Support for various game audio formats using media-libs/game-music-emu

ices

Icecast source output plugin

libvisual

Install xmms2-libvisual for use with the 'visualization' effect

mac

Support for Monkey's Audio (APE) format using media-sound/mac

mlib-update

Enable building of xmms2-mlib-updater client

server

Build xmms2 player daemon (otherwise only clients are built)

tremor

Support Vorbis using an alternate fixed-point decoder with media-libs/tremor

vocoder

Phase vocoder effect plugin

xml

Enable support for various XML based playlists and sources: RSS, XSPF

media-sound/xwax

alsa

Adds support for ALSA audio input/output.

cdda

Sets runtime dependencies to support decoding audio from a compact disc.

fallback

Sets runtime dependencies to support decoding "other" audio files.

mp3

Sets runtime dependencies to support decoding MP3 audio.

oss

Adds support for OSS (open sound system) audio input/output.

media-sound/yarock

mpv

Enable media-video/mpv backend

phonon

Enable media-libs/phonon backend

vlc

Enable media-video/vlc backend

media-sound/yoshimi

lv2

Add support for Ladspa V2

media-sound/zynaddsubfx

dssi

Enable support for DSSI Soft Synth Interface

media-tv/kodi

airplay

enable AirPlay support

bluetooth

Enable JSON-RPC over BT for remote control connected via bluetooth

bluray

Enable playback of Blu-ray filesystems

caps

Use sys-libs/libcap to bind to privileged ports as non-root

cec

Enable support for HDMI-CEC devices via libcec

eventclients

Install full set of Kodi python evenclients and evenclients examples

gbm

Use the Graphics Buffer Manager for EGL on KMS.

gles

Use simplified OpenGLES instead of full-scale OpenGL

libusb

Use virtual/libusb for usb device hotplug support. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use udev.

lirc

Enable support for IR remote controls using app-misc/lirc

mariadb

Enable support store of media library metadata on local or remote MariaDB

mysql

Enable support store of media library metadata on local or remote MySQL

nfs

Enable NFS client support

optical

Enable Audio CD playback, optical disks detection and reading (CD-ROM, Video CD, and others), and ISO optical disk images direct reading. DVD disks may require additional 'udf' flag.

pipewire

Enable pipewire support

soc

Use additional media-video/ffmpeg patches for efficient playback on some SoCs (e.g. ARM, RISC-V)

system-ffmpeg

Use system ffmpeg instead of the bundled one

udev

Use udev rules to handle devices' permissions and hotplug support. Unless you know what you're doing do not disable this flag on Linux kernels. This is provided as an option for completeness.

udf

Enable UDF support. Required for playing blurays.

webserver

Enable internal webserver

xslt

Enable metadata XSLT scrapers support with dev-libs/libxslt

media-tv/linuxtv-dvb-apps

alevt

Build videotext decoder

media-tv/mythtv

alsa

Allows MythTV to directly output sound to ALSA devices

asi

Support for DVEO ASI recorder

autostart

Use a custom autostart configuration

cec

Allows control of CEC enabled TVs via HDMI

ceton

Ceton InfiniTV 4 a CableCARD-enabled tuner support

debug

Instructs Qt to use the 'debug' target

fftw

Support visualizations via sci-libs/fftw

hdhomerun

Silicondust USA Inc.network-attached tuner support

ieee1394

Firewire enabled Cable boxe support

jack

Allows MythTV to use JACK as your sound output device

java

BD-J support for Blu-ray discs

lcd

Enable use of app-misc/lcdproc data display

lirc

LIRC remote control device support

nvdec

Enable NVDEC (NVCUVID) hardware accelerated video decoding

perl

Build the perl bindings for MythTV

vbox

V@Box Communications network-attached tuner devices support

vpx

Enable VP8/VP9 support for media-libs/libvpx

wrapper

Use Ubuntu mythtfrontend wrapper

x265

Enable h265 encoding using x265

xmltv

Support media-tv/xmltv TV listing - not used by Schedules Direct]

media-tv/tvheadend

ddci

Enable support for DDCI hardware

dvbcsa

Enable decryption of the DVB Common Scrambling Algorithm

hdhomerun

Enable support for the HDHomeRun device

imagecache

Enable support for image caching

iptv

Enable support for Internet Protocol TV

satip

Enable support for IP-based Satellite TV

timeshift

Enable TimeShift support

uriparser

Use dev-libs/uriparser

vpx

Enable transcoding with the VP8/VP9 video codecs

x264

Enable transcoding with the H.264 video codec

x265

Enable transcoding with the HEVC video codec

xmltv

Use media-tv/xmltv

media-tv/xmltv

ar

Argentina tv listing grabber

ch-search

Grabber for Switzerland

eu-epgdata

include fanart URLs for some European countries.

eu-xmltvse

Grabbber for Europe [replaces eu-dotmedia and se-tvzon]

fi

Finland tv listing grabber (0.6.1 add ampparit telsu)

fi-sv

Grabber for Finland (Swedish)

fr

France tv listing grabber

huro

Hungarian tv listing grabber

is

Iceland tv listing grabber

it

Italy tv listing grabber (RUV)

it-dvb

Italy tv listing grabber

na-dd

North America tv listing grabber

na-dtv

North America Direct TV grabber

na-tvmedia

Grabber for North America (TVMedia)

pt-vodafone

Grabber for Portugal (Vodafone)

tr

Turkey (Digiturk) tv listing grabber

tv-check

enable GUI checking

tv-combiner

enable grabbers combiner

tv-pick-cgi

enable CGI support

uk-tvguide

UK and Ireland tv listing grabber using TV Guide website

zz-sdjson

Grabber for schedulesDirect.org SD-JSON service (many countries)

zz-sdjson-sqlite

Grabber for schedulesDirect.org SD-JSON service (sqlite DB)

media-video/aegisub

uchardet

Enable charset discovery via app-i18n/uchardet

media-video/amdgpu-pro-amf

pro

Pull media-libs/mesa as dependency

radv

Pull media-libs/amdgpu-pro-vulkan as dependency

media-video/aravis

fast-heartbeat

Enable faster heartbeat rate.

gstreamer

Build the GStreamer plugin.

packet-socket

Enable packet socket support.

viewer

Build the GTK+-based video viewer.

media-video/bluray_info

mpv

Build bluray_player, powered by media-video/mpv

media-video/droidcam

gtk

Build the dev-cpp/gtkmm:3.0 client.

media-video/dvd_info

libmpv

Build DVD player using libmpv

media-video/ffdiaporama

openclipart

Support openclipart database

media-video/ffmpeg

amf

Enables support for AMD's Advanced Media Framework (AMF)

amr

Enables Adaptive Multi-Rate Audio support

amrenc

Enables Adaptive Multi-Rate Audio encoding support with media-libs/vo-amrwbenc.

appkit

Enables Apple AppKit framework

bluray

Enable playback of Blu-ray filesystems

bs2b

Enables media-libs/libbs2b based Bauer stereo-to-binaural filter.

cdio

Enables audio CD grabbing with dev-libs/libcdio.

chromaprint

Enables audio fingerprinting support with media-libs/chromaprint.

chromium

Builds libffmpeg.so to enable media playback in Chromium-based browsers like Opera and Vivaldi.

codec2

Enables codec2 low bit rate speech codec support via media-libs/codec2.

cpudetection

Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)

cuda

Enables CUDA-based acceleration. Mostly used for specific filters.

dav1d

Enables AV1 decoding via media-libs/dav1d.

fdk

Use external fdk-aac library for AAC encoding

flite

Adds a text-to-speech filter based on app-accessibility/flite.

frei0r

Enable frei0r wrapping in libavfilter

fribidi

Enables fribidi support in the drawtext filter.

gcrypt

Enables gcrypt support: Needed for rtmp(t)e support if openssl, librtmp or gmp is not used.

glslang

Use dev-util/glslang to compile GLSL

gme

Enables support for media-libs/game-music-emu for playing various video game music formats.

gpl

Build GPL code. Should be enabled unless you require LGPL binaries.

hardcoded-tables

Use pre-calculated tables rather than calculating them on the fly. It results in an increase of approximately 15% in the size of libavcodec, the main library impacted by this change. It enables savings in table generation time, done once at codec initialization, since by hardcoding the tables, they do not need to be computed at runtime. However, the savings are often negligible (~100k cycles is a typical number) especially when amortized over the entire encoding/decoding operation. Improvements are being made to the runtime initialization, and so over time, this option will have an impact on fewer and fewer codecs.

iec61883

Support for FireWire DV/HDV input device using media-libs/libiec61883.

kvazaar

Enables media-libs/kvazaar based HEVC encoder.

lcms

Enable ICC profile support via media-libs/lcms.

libaom

Enables media-libs/libaom based AV1 codec support.

libaribb24

Enables ARIB text and caption decoding via media-libs/aribb24.

libdrm

Enables x11-libs/libdrm support for better screen grabbing and hardware accelerated codecs.

libdvdnav

Uses media-libs/libdvdnav to enable DVD demuxing

libdvdread

Uses media-libs/libdvdread to enable DVD demuxing

libilbc

Enables iLBC de/encoding via media-libs/libilbc.

liblc3

Enables LC3 de/encoding via media-sound/liblc3.

libplacebo

Adds flexible GPU-accelerated processing filter based on media-libs/libplacebo.

librtmp

Enables Real Time Messaging Protocol using librtmp (media-video/rtmpdump) in addition to FFmpeg's native implementation.

libsoxr

Enables audio resampling through media-libs/soxr.

libtesseract

Enables the OCR filter via app-text/tesseract.

libv4l

Uses media-libs/libv4l for video4linux instead of direct calls. Adds support for more devices via the userspace library.

libxml2

Uses dev-libs/libxml2 to enable dash demuxing support.

lv2

Enables lv2 audio filter wrapper.

mipsdspr1

Enables MIPS DSP ASE R1 optimizations.

mipsdspr2

Enables MIPS DSP ASE R2 optimizations.

mipsfpu

Enables floating point MIPS optimizations.

mmal

Enables Multi-Media Abstraction Layer (MMAL) decoding support: Available e.g. on the Raspberry Pi.

network

Enables network streaming support

openh264

Enables H.264 encoding suppoprt via media-libs/openh264.

openssl

Enables dev-libs/openssl support. Adds support for encrypted network protocols (TLS/HTTPS).

pic

Force shared libraries to be built as PIC (this is slower)

postproc

Build and install libpostproc.

qrcode

Enables QR encode generation via media-gfx/qrencode

qsv

Enable Intel Quick Sync Video via media-libs/intel-mediasdk (ffmpeg versions older than, and including, 5.1) or media-libs/libvpl (ffmpeg version newer than 5.1).

quirc

Enables QR decoding via media-libs/quirc

rav1e

Enables AV1 encoding support via media-video/rav1e.

rubberband

Adds time-stretching and pitch-shifting audio filter based on media-libs/rubberband.

shaderc

Use media-libs/shaderc to compile GLSL

snappy

Enable app-arch/snappy support. Required for e.g. Vidvox Hap encoder.

sndio

Enable support for the media-sound/sndio backend

soc

Apply additional patches for efficient playback on some SoCs (e.g. ARM, RISC-V).

srt

Enable support for Secure Reliable Transport (SRT) via net-libs/srt

ssh

Enable SSH/sftp support via net-libs/libssh.

svt-av1

Enables AV1 encoding support via media-libs/svt-av1.

truetype

Enables drawtext filter via media-libs/freetype and media-libs/harfbuzz.

twolame

Enables MP2 encoding via media-sound/twolame as an alternative to the internal encoder.

vidstab

Enables video stabilization filter using vid.stab library (media-libs/vidstab).

vmaf

Enables Netflix's perceptual video quality assessment filter using the library (media-libs/libvmaf).

vpx

Enables VP8 and VP9 codec support using libvpx: Decoding does not require this to be enabled but libvpx can also be used for decoding; encoding requires this useflag to be enabled though.

x265

Enables HEVC encoding with media-libs/x265.

zeromq

Enables net-libs/zeromq support with the zmq/azmq filters.

zimg

Enables media-libs/zimg based scale filter.

zvbi

Enables media-libs/zvbi based teletext decoder.

media-video/ffmpeg-chromium

cpudetection

Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)

gpl

Build GPL code. Should be enabled unless you require LGPL binaries.

media-video/guvcview

qt5

Build with Qt5 interface instead Gtk+

media-video/handbrake

amf

Support for encoding h265 using AMD VCE encoder.

fdk

Support for encoding AAC using media-libs/fdk-aac.

gstreamer

Support for the streaming media framework from media-libs/gstreamer.

gtk

Install the GTK UI, ghb.

libdovi

Support for Dolby Vision using media-libs/libdovi.

numa

Adds support for x265's NUMA capabilities.

qsv

Support for encoding h264 using Intel Quick Sync Video.

x265

Support for encoding h265 using media-libs/x265.

media-video/libva-utils

examples

Build and install decode, encode, videoprocess and other VA-API examples.

putsurface

Build and install putsurface tool.

vainfo

Build and install vainfo tool.

media-video/makemkv

java

Handle additional Blu-ray protection mechanisms involving Java

media-video/mjpegtools

sdlgfx

Enables y4mhist to display a graphical histogram

media-video/mjpg-streamer

http-management

Enable experimental HTTP management option

input-control

Plugin giving ability to control camera movement (only specific cameras)

input-file

Plugin that watches given directory and send it's content

input-http

Plugin that takes http-input

input-ptp2

Plugin that sends video stream from PTP2 compatible camera

input-raspicam

Raspberry Pi camera support via the input_raspicam plugin

input-testpicture

Plugin for sending compiled in, test pictures

input-uvc

Plugin that sends video stream from UVC compatible camera

output-autofocus

Auto focusing plugin

output-file

Plugin that saves received content under given location

output-http

Small HTTP server plugin which sends WWW directory content and streams image content

output-rtsp

Plugin which provides a mechanism to take snapshots with a trigger from a UDP packet

output-udp

Plugin receiving content over UDP and storing to a directory

output-viewer

Plugin which allows to see output with viewer

output-zmqserver

Plugin which provides zmqserver processing

www

Installs WWW content

wxp-compat

Enable camera WXP compatible format

media-video/motion

mariadb

Add mariadb database support

mmal

Enables Multi-Media Abstraction Layer (MMAL) decoding support: Available e.g. on the Raspberry Pi.

media-video/motiontrack

multiprocess

Enables multi-process support (SMP/cluster) for motiontrack programs

media-video/mplayer

bl

Blinkenlights video output

bluray

Enable playback of Blu-ray filesystems

bs2b

Enable Bauer stereophonic-to-binaural headphone filter

cdio

Use libcdio for CD support (instead of cdparanoia)

cdparanoia

Enable cdparanoia (audio CD ripper) support

cpudetection

Enables runtime CPU detection (useful for binpkgs, compatibility on other CPUs)

dvdnav

Use forked libdvdnav, navigate menus in GUIs

enca

Enables support for charset discovery and conversion

faac

Use external faac library for AAC encoding

faad

Use external faad library for AAC decoding

libmpeg2

Build support for mpeg2 over media-libs/libmpeg2 rather than using ffmpeg.

live

Enables live.com streaming media support

md5sum

Enables md5sum video output

mng

MNG input support

network

Enables network streaming support

osdmenu

Enables support for on-screen display (OSD) menus

pnm

Add PNM video output option, to create PPM/PGM/PGMYUV images

pvr

Enable Video4Linux2 MPEG PVR

radio

Enable V4L2 radio interface and support

rar

Enable Unique RAR File Library

rtc

Enables usage of the linux real time clock. The alternative is software emulation of rtc

rtmp

Enables RTMPDump Streaming Media support

shm

Enable support for shm

tga

Enables Targa video output

toolame

Enable toolame MPEG-2 encoding

tremor

Enable internal support for Vorbis

twolame

Enable twolame MPEG-2 encoding

vcd

Enables VCD support

vidix

Support for vidix video output

yuv4mpeg

Enables yuv4mpeg video output

zoran

Enables ZR360[56]7/ZR36060 video output

media-video/mpv

archive

Enable support for various archive formats via app-arch/libarchive

bluray

Enable playback of Blu-ray filesystems

cli

Enable the command-line player

drm

Enable Kernel Mode Setting / Direct Rendering Manager based video outputs

gamepad

Enable gamepad input support

libmpv

Enable the shared library and headers (used by frontends / plugins)

lua

Enable Lua scripting, OSC (On Screen Controller) GUI, and net-misc/yt-dlp support

opengl

Enable support for OpenGL-based video backends (Note: deprecated for X11, USE=egl provides the newer support for -gpu-api=opengl)

pipewire

Enable sound support via native PipeWire backend

rubberband

Enable high quality pitch correction via media-libs/rubberband

sdl

Enable media-libs/libsdl2 based video and audio outputs (Note: these outputs exist for compatibility reasons only, avoid if possible)

sixel

Enable support for the sixel video backend using media-libs/libsixel

sndio

Enable sound support via media-sound/sndio

soc

Use additional media-video/ffmpeg patches for efficient playback on some SoCs (e.g. ARM, RISC-V)

tools

Install extra tools: mpv_identify.sh, mpv_idet.sh, and umpv

uchardet

Enable subtitles charset discovery via app-i18n/uchardet

zimg

Enable libzimg support (for vf_fingerprint)

media-video/noad

libmpeg2

Build support for mpeg2 through media-libs/libmpeg2 rather than using media-video/ffmpeg

media-video/obs-studio

browser

Enable browser source support via (precompiled) CEF.

decklink

Build the Decklink plugin.

fdk

Build with LibFDK AAC support.

mpegts

Enable native SRT/RIST mpegts output.

pipewire

Build with PipeWire support.

python

Build with scripting support for Python 3.

qsv

Build with Intel Quick Sync Video support.

sndio

Build with sndio support.

speex

Build with Speex noise suppression filter support.

test-input

Build and install input sources used for testing.

vlc

Build with VLC media source support.

websocket

Build with WebSocket API support.

media-video/peek

keybinder

Enable support for global hotkeys using dev-libs/keybinder

media-video/pipewire

echo-cancel

Enable WebRTC-based echo canceller via media-libs/webrtc-audio-processing

extra

Build pw-cat/pw-play/pw-record

flatpak

Enable Flatpak support

gsettings

Use gsettings (dev-libs/glib) to read/save used modules (useful for e.g. media-sound/paprefs

jack-client

Install a plugin for running PipeWire as a JACK client

jack-sdk

Use PipeWire as JACK replacement

liblc3

Allow loading LC3 plugins via media-sound/liblc3

lv2

Allow loading LV2 plugins via media-libs/lv2

modemmanager

Combined with USE=bluetooth, allows PipeWire to perform telephony on mobile devices.

pipewire-alsa

Replace PulseAudio's ALSA plugin with PipeWire's plugin

roc

Enable roc support for real-time audio streaming over the network, using media-libs/roc-toolkit. See https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Network#roc

sound-server

Provide sound server using ALSA and bluetooth devices

ssl

Enable raop-sink support (needs dev-libs/openssl)

system-service

Install systemd unit files for running as a system service. Not recommended.

X

Enable audible bell for X11

media-video/qmplay2

audiofilters

Build with AudioFilters module

avdevice

Build FFmpeg module with libavdevice suport

cdio

Build with AudioCD module

cuvid

Build with CUVID module

extensions

Build with Extensions module and enable other plugins

gme

Build Chiptune with GME support

inputs

Build with Inputs module

libass

Build with SSA/ASS subtitles rendering support

notifications

Build additional notifications module

pipewire

Build with PipeWire support

shaders

Compile Vulkan shaders using media-libs/shaderc

videofilters

Build with VideoFilters module

visualizations

Build with Visualizations module

media-video/rav1e

capi

Build the C-API library and header file

media-video/rtmpdump

gnutls

Use GnuTLS instead of OpenSSL for Cryptography

ssl

Enable Cryptographic features

tools

Enable installation of various binary tools in addition to librtmp library

media-video/simplescreenrecorder

asm

Enable x86 assembly optimisation.

vpx

Enable VP8 codec support via media-libs/libvpx.

media-video/totem

python

Build dev-lang/python using plugins (dbusservice for notifications and MPRIS control, interactive python console and opensubtitles lookup)

media-video/vdr

alternatechannel

Use alternate channel on record

bidi

fribidi support, for languages, written from right to left

demoplugins

Install demo and example plugins coming with vanilla vdr

graphtft

support for vdr-graphtft plugin up from version 0.1.7

html

Install HTML documentation

keyboard

enable keyboard support as remote device

mainmenuhooks

Allows to replace main menu entries by some special plugins (like epgsearch, extrecmenu, ...)

menuorg

Enables support for the media-plugins/vdr-menuorg

menuselection

adds support for menu hotkeys of double digits

naludump

Removes NALU fill data from h.264-Streams of TS files

permashift

permanent timeshift by recording live TV into RAM, need plugin media-plugins/vdr-permashift

pinplugin

Support for media-plugins/vdr-pin

resumereset

rreset resume of EOF

ttxtsubs

support for media-plugins/vdr-ttxtsubs

verbose

enable full output on compile

media-video/vidify

dbus

Support local MPRIS players

mpv

Use python-mpv as backend for vidify

vlc

Use python-vlc as backend for vidify

zeroconf

Use an external network player

media-video/vlc

aom

Enable AV1 encoding/decoding support using media-libs/libaom

archive

Enable support for libarchive stream extractor

aribsub

Enable support for decoding ARIB STD-B24 subtitles

bluray

Enable libbluray for Blu-ray disc support

chromaprint

Enable libchromaprint for Chromaprint based audio fingerprinter support

chromecast

Enable experimental support for Google Chromecast

dav1d

Enable support for media-libs/dav1d AV1 decoder

dc1394

Enable IIDC cameras support

directx

Enable Win32 DirectX, D3D11va and DxVA2 support

dvbpsi

Enable support for Mpeg-TS files (.ts, .m2ts, .mts) via media-libs/libdvbpsi

encode

Enable streaming-output support and videolan manager to control multiple streams from within one instance

faad

Enable AAC audio decoding library support via media-libs/faad2

fdk

Enable the Fraunhofer AAC codec library

fluidsynth

Enable Fluidsynth MIDI software synthesis (with external sound fonts)

gcrypt

Enable cryptography support via libgcrypt

gme

Enable support for media-libs/game-music-emu for playing various video game music formats

gstreamer

Enable GStreamer based decoding support (currently supports only video decoding)

kate

Adds support for Ogg Kate subtitles via libkate

kms

Enable kernel mode setting video output plugin via x11-libs/libdrm

libplacebo

Enable support for GPU accelerated video rendering with media-libs/libplacebo

libtar

Uses libtar instead of the built-in tar reader for reading custom skins

libtiger

Enable Ogg Kate subtitles rendering using libtiger

linsys

Enable support for Linux Linear Systems Ltd. SDI and HD-SDI input cards

live

Enable live555 streaming media support (client support for rtsp)

loudness

Enable loudness normalisation according to the EBU R128 standard using media-libs/libebur128

lua

Enable Lua scripting support, needed for including support for Jamendo (online music platform) and similar things

macosx-notifications

Enable Mac OS X notifications module (formerly growl)

matroska

Enable matroska support using reference libraries (fallback on other existing matroska support if disabled, i.e., matroska enabled FFmpeg)

mpeg

Add libmpeg2 support for mpeg-1 and mpeg-2 video streams

nfs

Enable support for nfs protocol via net-fs/libnfs

omxil

Enable OpenMAX Integration Layer codec module

optimisememory

Enable optimisation for memory rather than performance

projectm

Enable the projectM visualization plugin

run-as-root

Allows vlc to start for root. Don't enable this unless you have a very specific (e.g. embedded) need for it!

sdl-image

Enable sdl image video decoder (depends on sdl)

sftp

Enable libssh2 to support SFTP file transfer

shout

Enable libshout output

skins

Enable support for the skins2 interface

soxr

Enable SoX Resampler support via media-libs/soxr

srt

Enable support for Secure Reliable Transport (SRT) via net-libs/srt

tremor

Enable tremor, a fixed-point version of the Ogg Vorbis decoder

twolame

Enable twolame support (MPEG Audio Layer 2 encoder)

upnp

Enable support for the Intel SDK stack based UPnP discovery module instead of CyberLink

vpx

Enable the decoder(s) from the WebM VP8 / VP9 Codec SDK

X

Enable support for e.g. fullscreen mode via X and the X C-language binding. It does not build a graphical interface

x265

Support X265 Encoder

zeroconf

Enable support for zero-configuration networking via avahi

zvbi

Enable support for teletext subtitles via the zvbi library

media-video/webcamoid

headers

Install development headers

libuvc

Build with libuvc support

qtaudio

Enable audio capture/play via dev-qt/qtmultimedia

qtcamera

Enable video capture/play via dev-qt/qtmultimedia

v4lutils

Build with V4L-utils support

videoeffects

Build video effects

media-video/wireplumber

system-service

Install systemd unit files for running as a system service. Not recommended.

media-video/x264-encoder

avs

enable AvxSynth support in the AviSynth input module

ffmpegsource

Enable ffmpegsource aka ffms support, disables lavf

interlaced

Enable interlaced encoding support, this can decrease encoding speed by up to 2%

media-video/xine-ui

vdr

Enables Video Disk Recorder support

net-analyzer/2ping

server

Install the server init scripts.

net-analyzer/argus-clients

ft

Enable support for flow packets through net-analyzer/flow-tools

net-analyzer/barnyard

sguil

Enable sguil (The Analyst Console for Network Security Monitoring) support

net-analyzer/barnyard2

gre

Enable GRE support

mpls

Enable support for mpls networks

sguil

Enable sguil (The Analyst Console for Network Security Monitoring) support

net-analyzer/bwm-ng

csv

Enable csv output

html

Enable html output

net-analyzer/cacti

doc

install html documentation

net-analyzer/echoping

http

enable support for http protocol.

icp

enable support for ICP (used to monitor proxies).

priority

enable socket priority support.

smtp

enable support for SMTP protocol.

tos

enable support for TOS (TYpe Of Service).

net-analyzer/ettercap

plugins

Install ettercap plugins (et_*.so)

net-analyzer/flowgrind

pcap

Enable packet capturing support using net-libs/libpcap

net-analyzer/fprobe

messages

enable console messages

net-analyzer/goaccess

geoipv2

Enable support for GeoIP2 through dev-libs/libmaxminddb

getline

Use GNU getline() to parse full line requests

net-analyzer/greenbone-feed-sync

cron

Adds file to enable daily cron job to update Greenbone Community Feed's data"

net-analyzer/gr-fosphor

glfw

enable GLFW based interface

net-analyzer/gvm

cli

Command Line Interface for OpenVAS Scanner

gsa

Greenbone Security Assistant (WebUI)

ospd

Enable support for scanner wrappers

net-analyzer/hexinject

experimental

Install experimental packets.tcl

tools

Install hex2raw and prettypacket tools

net-analyzer/httping

tfo

Enable support for TCP Fast Open

net-analyzer/hydra

gcrypt

Enable radmin2 support through dev-libs/libgcrypt

libssh

Enable SSH support through net-libs/libssh

mongodb

MongoDB support through dev-libs/mongo-c-driver

net-analyzer/icinga2

console

Adds support for line-editing in the console

jumbo-build

Combine source files to speed up build process, requires more memory

mail

Allows for mailing of alerts

mariadb

Enable support for the mariadb database backend

nano-syntax

Adds support for syntax used in the nano editor

plugins

Adds support for nagios plugins

net-analyzer/ipsumdump

nanotimestamp

Enable timestamps with nano-second resolution

net-analyzer/linkchecker

sqlite

Mozilla Bookmark parsing

net-analyzer/monitoring-plugins

dns

Install net-dns/bind-tools required for monitoring DNS servers. Disabling the flag does not remove any plugins.

fping

Install net-analyzer/fping required for fancy ping monitoring. Disabling the flag does not remove any plugins.

game

Install games-util/qstat required for monitoring FPS servers. Disabling the flag does not remove any plugins.

ipv6

Enable ipv6 checks.

snmp

Install dev-perl/Net-SNMP and net-analyzer/net-snmp required for monitoring SNMP values. Disabling the flag does not remove any plugins.

ssh

Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugins.

net-analyzer/mtr

ipinfo

Disable support for IP address lookups

jansson

Enable JSON output support through dev-libs/jansson

net-analyzer/munin

asterisk

Install the packages required for monitoring Asterisk. Disabling the flag does not remove any plugin files.

cgi

Install the CGI-compatible scripts for on-the-fly generation of web pages and graphs. This is only meaningful if the minimal USE flag is disabled.

dhcpd

Install dev-perl/Net-IP, dev-perl/HTTP-Date and net-misc/dhcp to monitor DHCP lease usage. This only works if the server is on the same system as the node, so the server is also brought in. Disabling the flag does not remove any plugin file.

doc

Build and install a local copy of the HTML documentation for the whole software. This requires dev-python/sphinx to process the documentation sources.

http

Install dev-perl/libwww-perl required for monitoring HTTP-based services such as Apache and nginx. Disabling the flag does not remove any plugin file.

ipmi

Install sys-apps/ipmitool required for monitoring IPMI sensors. Disabling the flag does not remove any plugin file.

ipv6

Add support for IPv6 in munin-node. IPv6 support for the master is always enabled, but the node requires a newer version of dev-perl/Net-Server, capable of listening to IPv6 sockets.

irc

Install the packages required for monitoring IRC. Disabling the flag does not remove any plugin files.

java

Build the Java-based plugins to monitor JMX-compatible applications. Disabling the flag removes the jmx monitoring plugins.

memcached

Install the packages required for memcached monitoring. Disabling the flag does not remove any plugin files.

minimal

Only install munin-node and its plugins. This excludes the scripts to generate the web pages and the graphs.

mysql

Install the packages required for monitoring MySQL. Disabling the flag does not remove any plugin files.

postgres

Install the packages required for monitoring PostgreSQL. Disabling the flag does not remove any plugin files.

syslog

Configure the node by default to log on syslog. This requires the presence of virtual/perl-Sys-Syslog. As of version 2.0.2, the master scripts only log to file, and not to syslog.

net-analyzer/nagios-core

classicui

use the classic web theme

lighttpd

install www-servers/lighttpd config

web

enable web interface

net-analyzer/nagios-plugin-check_raid

3ware

Support 3ware RAID controllers

aacraid

Support Adaptec AAC-RAID controllers

dmraid

Support Device-Mapper RAID

hpa

Support HP Array controllers

hpsa

Support HP SmartArray (CCISS) controllers

megaraid-sas

Support LSI MegaRAID SAS controllers

mpt

Support LSI MPT Fusion controllers

mpt-sas2

Support LSI SAS-2 controllers

net-analyzer/nagios-plugins

ipv6

Enable ipv6 checks.

nagios-dns

Install net-dns/bind-tools required for monitoring DNS servers. Disabling the flag does not remove any plugin file.

nagios-game

Install games-util/qstat required for monitoring FPS servers. Disabling the flag does not remove any plugin file.

nagios-ping

Install net-analyzer/fping required for fancy ping monitoring. Disabling the flag does not remove any plugin file.

snmp

Install dev-perl/Net-SNMP required for monitoring SNMP values. Disabling the flag does not remove any plugin file.

ssh

Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugin file.

net-analyzer/nagios-plugins-linux-madrisan

curl

Build check_container which requires net-misc/curl

varlink

Build check_podman which requires dev-libs/libvarlink

net-analyzer/netdata

aclk

Enable Agent-Cloud Link (ACLK) for securely connecting a Netdata Agent to your web browser through Netdata Cloud

bpf

Enable the extended Berkeley Packet Filter (eBPF) collector to monitor kernel-level metrics about applications with per-second granularity

cloud

Enable Netdata Cloud support

dbengine

Enable the Netdata database engine

ipmi

Install sys-apps/ipmitool required for monitoring IPMI sensors.

mongodb

Enable support for the mongodb backend

nfacct

Enable the nfacct plugin

nodejs

Enable use of nodejs (which some plugins use)

prometheus

Enable support for the Prometheus remote write backend

tor

Enable monitoring of tor

xen

Enable monitoring of xen

net-analyzer/netperf

demo

Emit interim results during the run. May affect results

net-analyzer/net-snmp

elf

Enable the use of elf utils to check uptime on some systems

kmem

Enable usage of /dev/kmem

mfd-rewrites

Use MFD rewrites of mib modules where available

netlink

Use dev-libs/libnl to fetch TCP statistics instead of using /proc/net/tcp (Linux only).

pcap

Install snmppcap which reads from PCAP files and writes to the SNMP transport

pci

Use libpci (from sys-apps/pciutils) to look up network interface description. This feature is only available on Linux.

pcre

Add support for Perl Compatible Regular Expressions in process table filtering.

rpm

Enable monitoring of app-arch/rpm. This flag requires the bzip2 and zlib flags to be enabled as well.

smux

Enable support for the legacy smux protocol (superseded by agentx)

ucd-compat

Build UCD compatibility library. Increases significantly the install size.

net-analyzer/nfdump

ftconv

Build the flow-tools to nfdump converter

jnat

Build nfudmp to support JunOS NAT event logging

nfpcapd

Build nfpcapd collector to create netflow data from precollected pcap traffic

nfprofile

Build nfprofile used by NfSen

nftrack

Build nfprofile used by PortTracker

nsel

Build nfudmp to support NSEL/NEL event data

readpcap

Build nfcapd collector to read from pcap file instead ofnetwork data

sflow

Build sflow collector sfcpad

net-analyzer/nmap

libssh2

Enable SSH support through net-libs/libssh2

ncat

Install the ncat utility

ndiff

Install the ndiff utility

nping

Install the nping utility

nse

Include support for the Nmap Scripting Engine (NSE)

symlink

Install symlink to nc

zenmap

Install the GTK+ based nmap GUI, zenmap

net-analyzer/nrpe

command-args

Build support for specifying the command-line arguments from the Nagios/Icinga master. Make sure you understand the implications of this flag as it can be a security risk.

net-analyzer/nsca

crypt

Build support for crypted communication with nsca, through dev-libs/libmcrypt. It's recommended not to disable this flag unless all the communication will be handled in an absolutely safe environment.

minimal

Only build and install the send_nsca command and not the daemon. This allows a very minimal install with no overhead when setting up a node.

net-analyzer/openvas-scanner

snmp

Build againts net-analyzer/net-snmp for "improved SNMP support"

net-analyzer/ospd-openvas

notus

Set systemd service file to use notus-scanner

net-analyzer/ossec-hids

agent

Build "agent" installation target (see package description)

hybrid

Build "hybrid" installation target

Build "local" installation target

server

Build "server" installation target

net-analyzer/pinger

gtk2

Install the gtkpinger GUI utility based on x11-libs/gtk+:2

gtk3

Install the gtkpinger GUI utility based on x11-libs/gtk+:3

net-analyzer/pmacct

bgp-bins

Link BGP daemon binaries

bmp-bins

Link BMP daemon binaries

geoipv2

Enable support for GeoIP2 through dev-libs/libmaxminddb

jansson

Enable support for JSON through dev-libs/jansson

kafka

Enable support for Apache Kafka through dev-libs/librdkafka

l2

Enable Layer-2 features and support

ndpi

Enable support for nDPI through net-libs/nDPI

nflog

Enable support for NFLOG through uacctd

rabbitmq

Enable support for RabbitMQ through net-libs/rabbitmq-c

st-bins

Link Streaming Telemetry daemon binaries

traffic-bins

Link IPv4/IPv6 traffic accounting binaries

zmq

Enable support for ZeroMQ through net-libs/zeromq

net-analyzer/pnp4nagios

icinga

Build against net-analyzer/icinga2 instead of net-analyzer/nagios-core

nagios

Build against net-analyzer/nagios-core (the default)

net-analyzer/rrdcollect

exec

Enable exec:/// support

librrd

Use the librrd library from net-analyzer/rrdtool

net-analyzer/rrdtool

graph

Enable support for graphing functions

rados

Enable support for librados from sys-cluster/ceph

rrdcached

Build support for write-caching daemon

rrdcgi

Build rrdcgi support

net-analyzer/rustscan

nmap

Installs net-analyzer/nmap

net-analyzer/sancp

sguil

Enable sguil (The Analyst Console for Network Security Monitoring) support

net-analyzer/sarg

doublecheck

Make sarg double check the data it manipulates and output a warning if an error is found

gd

Enable support for graphs in reports through media-libs/gd

glob

Disable to ignore wildcards in file names

pcre

Enable support for regular expressions in the hostalias file through dev-libs/libpcre

net-analyzer/scanlogd

nids

Use net-libs/libnids for packet capturing

pcap

Use net-libs/libpcap for packet capturing

net-analyzer/sngrep

eep

Enable EEP packet send/receive support

gnutls

Use net-libs/gnutls to parse captured TLS packets

net-analyzer/snort

active-response

Enables support for automatically sending TCP resets and ICMP unreachable messages to terminate connections. Used with inline deployments.

control-socket

Enables Snort's control socket.

file-inspect

Enables extended file inspection capabilities.

flexresp3

Enables support for new flexable response preprocessor for enabling connection tearing for inline deployments. Replaces flexresp and flexresp2.

gre

Enable support for inspecting and processing Generic Routing Encapsulation (GRE) packet headers. Only needed if you are monitoring GRE tunnels.

high-availability

Enables high-availability state sharing.

inline-init-failopen

Enables support to allow traffic to pass (fail-open) through inline deployments while snort is starting and not ready to begin inspecting traffic. If this option is not enabled, network traffic will not pass (fail-closed) until snort has fully started and is ready to perform packet inspection.

large-pcap-64bit

Allows Snort to read pcap files that are larger than 2 GB. ONLY VALID FOR 64bit SYSTEMS!

libtirpc

Build against net-libs/libtirpc for RPC support

linux-smp-stats

Enable accurate statistics reporting through /proc on systems with multiple processors.

non-ether-decoders

Enable decoding of non-ethernet protocols such as TokenRing, FDDI, IPX, etc.

open-appid

Enable OpenAppID, an open, application-focused detection language and processing module for Snort that enables users to create, share, and implement application detection. Requires dev-lang/luajit.

perfprofiling

Enables support for preprocessor and rule performance profiling using the perfmonitor preprocessor.

ppm

Enables support for setting per rule or per packet latency limits. Helps protect against introducing network latency with inline deployments.

react

Enables support for the react rule keyword. Supports interception, termination, and redirection of HTTP connections.

reload-error-restart

Enables support for completely restarting snort if an error is detected during a reload.

shared-rep

Enables the use of shared memory for the Reputation Preprocessor (Only available on Linux systems)

side-channel

Enables Snort's side channel.

sourcefire

Enables Sourcefire specific build options, which include --enable-perfprofiling and --enable-ppm.

net-analyzer/suricata

af-packet

Enable AF_PACKET support

af-xdp

Enable AF_XDP support

bpf

Enable support for eBPF (as well as XDP if supported by the kernel and the NIC driver) for low-level, high-speed packet processing

control-socket

Enable unix socket

detection

Enable detection modules

hyperscan

Enable high-performance regex matching with Hyperscan

lz4

Enable support for compressed pcap logging using the LZ4 algorithm

nflog

Enable libnetfilter_log support

nfqueue

Enable NFQUEUE support for inline IDP

redis

Enable Redis support

net-analyzer/symon

perl

Enables a generic perl symux client

symon

Enables the system monitor. Offers no functionality but monitoring and forwarding of measured data

symux

Enables the multiplexer which stores incoming symon streams on disk in RRD (net-analyzer/rrdtool) files

net-analyzer/tcpdump

smi

Build with net-libs/libsmi to load MIBs on the fly to decode SNMP packets

net-analyzer/tcpreplay

pcapnav

Enable if you want the jump to byte offset feature via net-libs/libpcapnav

tcpdump

Use net-analyzer/tcpdump for packet decoding feature

net-analyzer/testssl

bundled-openssl

Install precompiled versions of OpenSSL for greater testing coverage

net-analyzer/tracebox

curl

Build the curl component for uploading capture files using net-misc/curl

sniffer

Build the sniffer component using net-libs/libnetfilter_queue

net-analyzer/wireshark

androiddump

Install androiddump, an extcap interface to capture from Android devices

bcg729

Use media-libs/bcg729 for G.729 codec support in RTP Player

capinfos

Install capinfos, to print information about capture files

captype

Install captype, to print the file types of capture files

ciscodump

Install ciscodump, extcap interface to capture from a remote Cisco router

dftest

Install dftest, to display filter byte-code, for debugging dfilter routines

dpauxmon

Install dpauxmon, an external capture interface (extcap) that captures DisplayPort AUX channel data from linux kernel drivers

dumpcap

Install dumpcap, to dump network traffic from inside wireshark

editcap

Install editcap, to edit and/or translate the format of capture files

http3

Install net-libs/nghttp3 for enhanced HTTP3 analysis

ilbc

Build with iLBC support in RTP Player using media-libs/libilbc

libxml2

Use dev-libs/libxml2 for handling XML configuration in dissectors

maxminddb

Use dev-libs/libmaxminddb for IP address geolocation

mergecap

Install mergecap, to merge two or more capture files into one

minizip

Build with zip file compression support

netlink

Use dev-libs/libnl

pcap

Use net-libs/libpcap for network packet capturing (build dumpcap, rawshark)

plugins

Install plugins

qt6

Build with Qt6 support instead of the default Qt5 for GUI support

randpkt

Install randpkt, a utility for creating pcap trace files full of random packets

randpktdump

Install randpktdump, an extcap interface to provide access to the random packet generator (randpkt)

reordercap

Install reordercap, to reorder input file by timestamp into output file

sbc

Use media-libs/sbc for playing back SBC encoded packets

sdjournal

Install sdjournal, an extcap that captures systemd journal entries

sharkd

Install sharkd, the daemon variant of wireshark

smi

Use net-libs/libsmi to resolve numeric OIDs into human readable format

spandsp

Use media-libs/spandsp for for G.722 and G.726 codec support in the RTP Player

sshdump

Install sshdump, an extcap interface to capture from a remote host through SSH

text2pcap

Install text2pcap, to generate a capture file from an ASCII hexdump of packets

tfshark

Install tfshark, a terminal-based version of the FileShark capability

tshark

Install tshark, to dump and analyzer network traffic from the command line

udpdump

Install udpdump, to get packets exported from a source (like a network device or a GSMTAP producer) that are dumped to a pcap file

wifi

Install wifidump, to dump and analyse 802.11 traffic

net-analyzer/zabbix

agent

Enable zabbix agent (for to-be-monitored machines)

agent2

Enable go-based zabbix agent 2 (for to-be-monitored machines)

frontend

Enable zabbix web frontend

ipv6

Turn on support of IPv6

java

Enable Zabbix Java JMX Management Gateway

libxml2

Use libxml2 client library

odbc

Enable Database Monitor and use UnixODBC Library by default

openipmi

Enable openipmi things

openssl

Use dev-libs/openssl as TLS backend

proxy

Enable proxy support

server

Enable zabbix server

ssh

SSH v2 based checks

static

Build statically linked binaries

net-analyzer/zmap

mongo

Add support for storing in a mongo DB via dev-db/mongodb

redis

Add support for storing in a redis DB via dev-libs/hiredis

net-dialup/accel-ppp

ipoe

Build IPoE kernel module

libtomcrypt

Support crypto algorithms through dev-libs/libtomcrypt instead of dev-libs/openssl

shaper

Support for traffic shaping

net-dialup/freeradius

memcached

Include dev-libs/libmemcached in caching drivers

mongodb

Include support for MongoDB database

redis

Include support for Redis database

net-dialup/freeradius-client

scp

Add service type hints derived from username prefix

shadow

Enable shadow password support

net-dialup/mgetty

fax

Enables fax support

fidonet

Enables FidoNet support

net-dialup/ppp

activefilter

Enables active filter support

gtk

Installs GTK+ password prompting program that can be used by passprompt.so PPP plugin for reading the password from a X11 input terminal

net-dialup/xl2tpd

kernel

Enable kernel interface for PPPoL2TP

net-dns/avahi

autoipd

Build and install the IPv4LL (RFC3927) network address configuration daemon

bookmarks

Install the avahi-bookmarks application (requires dev-python/twisted)

gtk

Use gtk3 for the avahi utilities to build the avahi-ui-gtk3 library

howl-compat

Enable compat libraries for howl

mdnsresponder-compat

Enable compat libraries for mDNSResponder

net-dns/bind

dlz

Enables dynamic loaded zones, 3rd party extension

dnsrps

Enable the DNS Response Policy Service (DNSRPS) API, a mechanism to allow an external response policy provider

dnstap

Enables dnstap packet logging

doh

Enables dns-over-https

fixed-rrset

Enables fixed rrset-order option

geoip2

Enable GeoIP2 API from MaxMind

gssapi

Enable gssapi support

json

Enable JSON statistics channel

lmdb

Enable LMDB support to store configuration for 'addzone' zones

net-dns/bind-tools

gssapi

Enable gssapi support

net-dns/ddclient

examples

Install various example files, like for cron.

net-dns/djbdns

ipv6

Apply Fefe's patch (https://www.fefe.de/dns/) for ipv6 support.

net-dns/dnsdist

bpf

Enable support for eBPF socket filtering

dnscrypt

Enable the ability to act as a DNSCrypt server

dnstap

Enable support for dnstap

doh

Enable support for dns over http via net-libs/nghttp2

doh3

Enable support for dns over http3 via net-libs/quiche

ipcipher

Enable support for ipcipher via dev-libs/openssl

lmdb

Enable support for lmdb

quic

Enable support for dns over quic via net-libs/quiche

regex

Enable support for regular expression matching via dev-libs/re2

remote-logging

Enable support for remote logging via dev-libs/protobuf

ssl

Enable support for and encrypted client-server communication via dev-libs/libsodium

web

Enable support for the web UI

xdp

Enable support for AF_XDP high performance packet processing

net-dns/dnsmasq

auth-dns

Add support for acting as an authorative DNS server.

conntrack

Add support for Linux conntrack connection marking.

dhcp

Enable support for acting as a DHCP server.

dhcp-tools

Install extra command line tools for manually managing DHCP leases.

dnssec

Enable support DNSSEC validation and caching.

dumpfile

Include code to dump packets to a libpcap-format file for debugging

id

Whether report *.bind CHAOS info to clients, otherwise forward such requests upstream instead

libidn2

Enable support for Internationalized Domain Names, via net-dns/libidn2 rather than net-dns/libidn

loop

Include functionality to probe for and remove DNS forwarding loops

nettlehash

Use hashing functions from dev-libs/nettle

script

Enable support for calling scripts when leases change.

tftp

Enables built in TFTP server for netbooting.

net-dns/dnssec-validator

dlv

Enable support for the DNSSEC look-aside validation

nsec3

Enable support for the NSEC3 Resource Record

net-dns/getdns

getdns-query

Add getdns_query tool

getdns-server-mon

Add getdns_server_mon tool

libev

Enable dev-libs/libev support

libevent

Enable dev-libs/libevent support

libuv

Enable dev-libs/libuv support

minimal

Only build stub resolution mode

stubby

Add Stubby DNS Privacy Deamon

unbound

Enable net-dns/unbound libraries support

net-dns/hash-slinger

ipsec

Enable support for IPSECKEY records (ipseckey)

openpgp

Enable support for OPENPGPKEY records (openpgpkey)

ssh

Enable support for SSHFP records (sshfp)

net-dns/idnkit

liteonly

Compile and install lite library only

net-dns/inadyn

mbedtls

Use net-libs/mbedtls as tls provider.

openssl

Use dev-libs/openssl as tls provider.

net-dns/knot

authsignal

Enable Automatic Authenticated DNSSEC Bootstrapping records

cookies

Enable the DNS cookie module (RFC 7873)

daemon

Enable Knot DNS main daemon

dnsproxy

Enable the tiny DNS proxy module

dnstap

Include support for the dnstap binary log format (http://dnstap.info/)

doh

Enable DNS over HTTP (DoH) using libnghttp2

fastparser

Use a zone file parser that is faster, but requires more memory and CPU time to compile

geoip

Enable the Geography-based responses module

libidn2

If IDN support is enabled, use net-dns/libidn2 instead of net-dns/libidn

noudp

Enable the module which can send empty truncated responses to UDP queries

onlinesign

Enable the module that sign zones on the fly instead of pre-signing zone

pkcs11

Add support for PKCS#11

queryacl

Enable the module for query access control

quic

Enable the DNS over QUIC (DoQ) module using libngtcp2

rrl

Enable the response rate limiting module

stats

Enable the server statistics module

synthrecord

Enable the automatic forward/reverse records module

utils

Install Knot utilities, such as kdig, kzonecheck, ...

whoami

Enable the whoami response module

xdp

Enable eXpress Data Path

net-dns/knot-resolver

dnstap

Build dnstap binary logging module

kresc

Build (experimental) command-line client

manager

Manager is a user-friendly interface and a component handling rolling restarts, config update logic and more.

nghttp2

DNS-over-HTTPS support

prometheus

Metrics exported in Prometheus

xdp

Enable eXpress Data Path

net-dns/nsd

bind8-stats

Enables BIND8 like NSTATS and XSTATS and statistics in nsd-control

default-znow

Enable full relocation binding at load-time (RELRO NOW, to protect GOT and .dtor areas)

dnstap

Enable the structured binary log format

ipv6

Enable IPv6 support

largefile

Enables support for large files

libevent

Use libevent or libev, useful when zone count is high

memclean

Cleanup memory (at exit) for eg. valgrind, memcheck

minimal-responses

If minimal responses are disabled, responses are more likely to get truncated, resulting in TCP fallback

mmap

Use mmap(2) instead of malloc(3); currently experimental

munin

Install a plugin for net-analyzer/munin to graph statistical data from nsd

nsec3

Enable NSEC3 support

packed

Enable packed structure alignment; uses less memory but has unaligned reads

radix-tree

Use a radix tree for main lookups instead of a red-black tree

ratelimit

Enables ratelimiting, based on query name, type and source

recvmmsg

Enable recvmmsg and sendmmsg compilation, faster but some kernel versions may have implementation problems for IPv6

simdzone

Leverage SIMD instructions in modern CPUs to improve throughput

tfo

Enable TCP Fast Open

year2038

Enables support for 64-bit 'time_t' (sets D_TIME_BITS=64; glibc only)

net-dns/opendnssec

external-hsm

Enables support for storing DNSSEC keys through an arbitrary non-portage PKCS#11 interface, specified through an environment variable

opensc

Enables support for storing DNSSEC keys through a dev-libs/opensc PKCS#11 interface

signer

Enables signing capabilities for OpenDNSSEC

softhsm

Enables support for storing DNSSEC keys in a dev-libs/softhsm PKCS#11 object

net-dns/pdns

lmdb

Use LMDB as backend.

lua-records

Enable LUA records.

remote

Use a generic socket or pipe as a backend (via JSON RPC requests).

sodium

Use dev-libs/libsodium for cryptography

tinydns

Use a TinyDNS CDB database as backend.

tools

Build optional tools (dnsscan, dnsscope, etc..).

net-dns/pdnsd

urandom

Linux-only: use /dev/urandom (pseudo-random number generation) instead of the default use of random() PRNG.

net-dns/pdns-recursor

dnstap

Enable support for dnstap

sodium

Use dev-libs/libsodium for cryptography

net-dns/rbldnsd

ipv6

Support listening on ipv6 addresses and ipv6 database entries.

net-dns/resolvconf-symlink

symlink

Actually replace /etc/resolv.conf with a symlink. Without this flag, the ebuild is a no-op.

net-dns/unbound

dnscrypt

Enable DNSCrypt support

dnstap

Enable dnstap support

ecdsa

Enable ECDSA support

ecs

Enable EDNS client subnet support

gost

Enable GOST support

http2

Enable HTTP/2 support for DoHnet-libs/nghttp2

redis

Enable cache db backend which usesdev-libs/hiredis

tfo

Enable TCP Fast Open client+server

net-firewall/arno-iptables-firewall

plugins

Install optional plugins

rsyslog

Install configuration snippet for app-admin/rsyslog

net-firewall/conntrack-tools

cthelper

Use net-libs/libnetfilter_cthelper for userspace conntrack helper support

cttimeout

Use net-libs/libnetfilter_cttimeout for conntrack timeout support

net-firewall/ebtables

perl

Install the ebtables-save script which uses perl

net-firewall/firehol

ipset

Use net-firewall/ipset.

net-firewall/fwknop

client

Build fwknop client

extras

Install utility scripts and AppArmor policy for fwknopd

firewalld

Use net-firewall/firewalld as the default server backend

gdbm

Use sys-libs/gdbm to store fwknopd digest cache

gpg

Enable GPG support via app-crypt/gpgme

iptables

Use net-firewall/iptables as the default server backend

nfqueue

Enable UDP-only NFQUEUE server mode (no net-libs/libpcap dependency)

server

Build fwknopd server

udp-server

Enable UDP-only server mode (no net-libs/libpcap dependency)

net-firewall/iptables

conntrack

Build against net-libs/libnetfilter_conntrack when enables the connlabel matcher

netlink

Build against libnfnetlink which enables the nfnl_osf util

nftables

Support nftables kernel interface

pcap

Build against net-libs/libpcap which enables the nfbpf_compile util

net-firewall/ipt_netflow

natevents

Netflow NAT translation events (NEL) support

net-firewall/nftables

doc

Create man pages for the package (requires app-text/asciidoc)

json

Enable JSON support via dev-libs/jansson

xtables

Add libxtables support to try to automatically translate rules added by iptables-compat

net-firewall/pglinux

cron

Install cron script

net-firewall/shorewall

init

Adds the capability to place the firewall in a safe state prior to bringing up the network interfaces

ipv4

Installs everything needed to create a full IPv4 firewall

ipv6

Adds the capability to create a full IPv6 firewall (requires net-firewall/shorewall ipv4 USE flag)

lite4

Installs everything needed to just *run* an IPv4 compiled firewall script created with net-firewall/shorewall ipv4 USE flag

lite6

Installs everything needed to just *run* an IPv6 compiled firewall script created with net-firewall/shorewall ipv6 USE flag

net-firewall/ufw

examples

Example ufw config files

ipv6

IPv6 support for iptables

net-fs/autofs

dmalloc

Enable debugging with the dmalloc library

ldap

Install LDAP module

libtirpc

Use TiRPC library instead of SunRPC

mount-locking

Enable locking to prevent corruption of /etc/mtab in the presence of concurrent auto-mounting. If enabled, recursive auto-mounting (eg. using autofs to bind or loop mount a filesystem which is itself auto-mounted) is not possible.

sasl

Enable SASL support in the LDAP module

net-fs/cifs-utils

Enable Active Directory support and create cifs.idmap binary - idmap support

caps

Enable sys-libs/libcap-ng support

creds

cifs credentials support

python

Enable support for python and install python tools

net-fs/cvmfs

server

Install the cvmfsd program and init script

net-fs/libnfs

utils

Build/install nfs-{cat,ls,cp} utils

net-fs/netatalk

pgp

Add support pgp authentication module

quota

Add support for user quota on various filesystems

shadow

Add shadow support

ssl

Use dev-libs/openssl to provide DHX User Access Modules. These are not used with most recent versions of OS X and can be kept disabled without risks.

tracker

Add support for spotlight like tracker

net-fs/nfs-utils

junction

Enable NFS junction support in nfsref

ldap

Add ldap support

libmount

Link mount.nfs with libmount

nfsv3

Enable support for NFSv2 and NFSv3

nfsv4

Enable support for NFSv4 (includes NFSv4.1 and NFSv4.2)

uuid

Support UUID lookups in rpc.mountd

net-fs/openafs

apidoc

Build API documentation using app-text/doxygen. May take a *long* time to build.

bitmap-later

Enable fast startup of file server by not reading bitmap till needed.

fuse

Build fuse client.

kauth

Install the DEPRECATED kauth server, PAM modules, and utilities

modules

Build libafs kernel module. Disable only if you know what you're doing: without this module OpenAFS client will not work.

namei

Enable namei fileserver instead of inode fileserver. You should disable this option only if compatibility with inode format AFS storage is required.

pthreaded-ubik

Enable installation of pthreaded ubik applications.

supergroups

Enable support for nested pts groups.

tsm

Enable use of the Tivoli TSM API libraries from app-backup/tsm for butc support. AMD64 only.

ubik-read-while-write

Enable vlserver read from db cache during write locks (EXPERIMENTAL)

net-fs/s3backer

nbd

Support export as an nbd device

net-fs/s3fs

gnutls

Enable net-libs/gnutls crypto backend

nettle

Use dev-libs/nettle network functions with GnuTLS.

nss

Enable dev-libs/nss crypto backend

net-fs/samba

addc

Enable Active Directory Domain Controller support

Enable Active Directory support

ceph

Enable support for Ceph distributed filesystem via sys-cluster/ceph

client

Enables the client part

cluster

Enable support for clustering

glusterfs

Enable support for Glusterfs filesystem via sys-cluster/glusterfs

gpg

Use app-crypt/gpgme for AD DC

iprint

Enabling iPrint technology by Novell

json

Enable json audit support through dev-libs/jansson

lmdb

Enable LMDB backend for bundled ldb

profiling-data

Enables support for collecting profiling data

quota

Enables support for user quotas

regedit

Enable support for regedit command-line tool

snapper

Enable vfs_snapper module (requires sys-apps/dbus)

spotlight

Enable support for spotlight backend

system-heimdal

Use app-crypt/heimdal instead of bundled heimdal.

system-mitkrb5

Use app-crypt/mit-krb5 instead of app-crypt/heimdal.

unwind

Enable libunwind usage for backtraces

winbind

Enables support for the winbind auth daemon

net-ftp/frox

transparent

Enable transparent proxying of data connections

net-ftp/ftpbase

zeroconf

Enable support for zero-configuration networking via Avahi.

net-ftp/lftp

convert-mozilla-cookies

Install the convert-mozilla-cookies script and its run-time dependencies

verify-file

Install the verify-file script and its run-time dependencies

net-ftp/proftpd

authfile

Enable support for the auth-file module

ban

Enable support for the mod_ban module

case

Enable support for the mod_case module

copy

Enable support for the mod_copy module

ctrls

Enable support for the mod_ctrls and mod_ctrls_admin modules

deflate

Enable support for the mod_deflate module

diskuse

Enable support for the mod_diskuse module

dso

Enable support for the mod_dso module

dynmasq

Enable support for the mod_dynmasq module, for dynamically updating MasqueradeAddress for dyndns-like scenarios)

exec

Enable support for the mod_exec module. WARNING: this could be a security risk

ident

Enable support for the mod_ident module

ifsession

Enable support for the ifsession module

ifversion

Enable support for the mod_ifversion module

log-forensic

Enable support for the mod_log_forensic module, log only suspicious actions.

memcache

Enable support for the mod_memcache module, for using memcached servers

msg

Enable support for the mod_msg module, allows system users to send messages to connected clients via the ftpdctl program.

qos

Enable support for the mod_qos module

ratio

Enable support for the mod_ratio module

readme

Enable support for the mod_readme module

rewrite

Enable support for the rewrite module

sftp

Enable support for the mod_sftp module and optionally mod_sftp_sql and mod_sftp_pam if matching USE flags are enabled

shaper

Enable support for the mod_shaper module

sitemisc

Enable support for the sitemisc module

sodium

Use dev-libs/libsodium for password encryption an key exchange

softquota

Enable support for the quotatab module

unique-id

Enable support for the mod_unique_id module, every connection gets unique ID.

vroot

Enable support for the virtual root module

net-ftp/pure-ftpd

anondel

Permit anonymous to delete files

anonperm

Permit anonymous to change file permissions

anonren

Permit anonymous to rename files

anonres

Permit anonymous to resume file transfers

implicittls

Enable TLS on Port 990

noiplog

Disables logging of IP addresses

paranoidmsg

Display paranoid messages instead of normal ones

resolveids

Resolve UIDs/GIDs

sysquota

Enables system quota support (needs sys-fs/quota)

vchroot

Enable support for virtual chroot (possible security risk)

net-ftp/tftp-hpa

client

Compile and install the tftp client

server

Compile and install the tftp server

net-ftp/yafc

ssh

Build with SFTP support

net-im/biboumi

udns

Asynchronously resolve domain names using net-libs/udns

net-im/bitlbee

libevent

Use libevent for event handling

nss

Prefer dev-libs/nss as SSL/TLS provider

otr

Enable support for encrypted conversations

plugins

Enable support for plugins

purple

Use libpurple instead of the built-in IM protocol support

twitter

Enable Twitter protocol support

net-im/coturn

mongodb

Enable support for the mongodb database

redis

Enable support for the redis database

net-im/dino

gpg

Enable OpenPGP encryption plugin

http

Enable HTTP file upload plugin

notification-sound

notification sounds plugin

omemo

Enable OMEMO encryption plugin

rtp

Enable Audio/Video calls over XMPP using RTP

net-im/ejabberd

captcha

Support for CAPTCHA Forms (XEP-158) on registration

full-xml

Use XML features in XMPP stream (ex: CDATA), requires XML compliant clients

mssql

Enable Microsoft SQL Server support (via ODBC) for data storage

mysql

Enable MySQL support for data storage

odbc

Enable ODBC support to access data storage

postgres

Enable PostgreSQL support for data storage

redis

Enable Redis support for transient data

roster-gw

Turn on workaround for processing gateway subscriptions

sip

Enable SIP support

sqlite

Enable SQLite database support

stun

Enable STUN/TURN support

zlib

Enable Stream Compression (XEP-0138) using zlib

net-im/err

irc

Pull optional dependencies, needed for IRC backend

net-im/gajim

crypt

End to end encryption and GPG encryption

geolocation

Sharing your location

jingle

Audio and video calls

remote

Controling Gajim instance from command line with gajim-remote

rst

Generating XHTML output from RST code

spell

Spellchecking of composed messages

upnp

Ability to request your router to forward port for file transfer

webp

Support WebP avatars

net-im/libcommuni

qml

Install optional qml files.

uchardet

Use app-i18n/uchardet, which is upstreams default, instead of dev-libs/icu, which makes impossible to run tests.

net-im/pidgin

gadu

Enable Gadu Gadu protocol support

groupwise

Enable Novell Groupwise protocol support

gstreamer

Enables voice and video sessions

gtk

Builds Pidgin, the GTK+ interface

meanwhile

Enable meanwhile support for Sametime protocol

ncurses

Build finch, console interface

prediction

Enable Contact Availability Prediction plugin

python

Build libgnt (GLib Ncurses Toolkit used by finch) with python scripting support

xscreensaver

Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events

zephyr

Enable Zephyr protocol support

net-im/profanity

gpg

Enable OpenPGP encryption

omemo

Enable OMEMO encryption

omemo-qrcode

Enable exchanging OMEMO information via QR code

otr

Enable encrypted conversations using Off-The-Records messaging

python

Enable Python plugins support

net-im/prosody

libevent

Use libevent for event handling

net-im/psi

aspell

Enable spellchecking using app-text/aspell

enchant

Enable spellchecking using app-text/enchant

extras

Enable Psi+ patchset

hunspell

Enable spellchecking using app-text/hunspell

iconsets

Install additional iconsets, some of them have no clear licensing

webengine

Enable themed, html-based chatlogs using dev-qt/qtwebengine

whiteboarding

Enable experimental interactive SVG drawing

xscreensaver

Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events

net-im/psimedia

extras

Enable Psi+ mode (required when built for Psi+)

net-im/qtox

spellcheck

Enable spell checking support

X

Enable auto-away support

net-im/spectrum2

frotz

Enables the Z-Engine backend.

irc

Enables the IRC backend, based on net-im/libcommuni.

purple

Enables the libpurple backend, based on net-im/pidgin.

sms

Enables the SMS backend, based on app-mobilephone/smstools.

twitter

Enables the Twitter backend.

Enables the WhatsApp backend, based on net-im/transwhat.

net-im/telegram-desktop

enchant

Use the app-text/enchant spell-checking backend instead of app-text/hunspell

fonts

Use builtin patched copy of open-sans fonts (overrides fontconfig)

libdispatch

Use dev-libs/libdispatch to speed up concurrent code execution

qt6

Build with Qt6 support

qt6-imageformats

Add support for HEIF, AVIF and JpegXL by bundling kde-frameworks/kimageformats

net-im/tkabber

plugins

Enables installation the extra plugins

net-im/tokodon

mpv

Use media-libs/mpvqt instead of dev-qt/qtmultimedia for video playback (default)

webengine

Use dev-qt/qtwebengine for built-in authentication page (default is external browser)

net-im/toxic

audio-notify

Enables native sound notifications

experimental

Use experimental features in net-libs/tox

games

Enables some small mini-games

llvm

Enables support for LLVM Address Sanitizer

notification

Enables desktop notifications with libnotify, with sound support.

qrcode

Enables QR code support

sound

Enables audio calling

video

Enables video calling

net-im/zoom

bundled-qt

Use bundled Qt and icu instead of system-wide libs

opencl

Use OpenCL for virtual background support (virtual/opencl)

zoom-symlink

Install a zoom symlink in /usr/bin

net-irc/anope

ldap

Build LDAP modules for e.g. opertypes

sql

Build modules which require SQL

ssl

Provide SSL services using OpenSSL

tre

Use dev-libs/tre for regular expressions

net-irc/atheme-services

cracklib

Enable nickserv/cracklib module for enforcing strong account passwords

largenet

Enable support/tweaks for large networks

ldap

Enable ldap-backed authentication module

perl

Install a perl module which wraps around the services' XML-RPC interface

net-irc/hexchat

libcanberra

Enable sound event support using media-libs/libcanberra

plugin-checksum

Build Checksum plugin (needs plugins)

plugin-fishlim

Build FiSHLiM plugin (needs plugins )

plugin-sysinfo

Build SysInfo plugin (needs plugins)

theme-manager

Build the theme manager (mono)

net-irc/inspircd

argon2

Enable Argon2 hashes in modules

gnutls

Enable TLS support

ldap

Enable LDAP support

log-json

Enable logging via JSON

maxminddb

Add support for geolocation using libMaxMindDB

mbedtls

Add support for TLS using the mbedTLS library

mysql

Enable MySQL database backend

pcre2

Add support for Perl Compatible Regular Expressions 2

postgres

Enable PostgreSQL database backend

re2

Add support for Google RE2 regular expressions library

regex-posix

Add support for POSIX Regular Expressions

regex-stdlib

Add support for C++ stdlib regular expressions

sqlite

Enable Sqlite database backend

ssl

Enable SSL support

sslrehashsignal

Enable rehashing SSL module by SIGUSR1

tre

Enable support for TRE, a lightweight, robust, and efficient POSIX compliant regexp matching library

net-irc/iroffer-dinoex

admin

Compile with HTTP Admin

blowfish

Compile with blowfish encryption support

chroot

Compile with chroot support

http

Compile with HTTP server support

memsave

Compile with memory protection

telnet

Compile with Telnet server support

net-irc/irssi

otr

Adds support for a loadable IRC otr module

proxy

Adds support for a loadable IRC proxy module

net-irc/kvirc

webengine

Support Qt WebEngine

net-irc/limnoria

crypt

Enables user authentication with GPG

net-irc/ngircd

ident

Enables support for net-libs/libident

irc-plus

Enables support for the IRC+ protocol (needs virtual/libiconv)

strict-rfc

Strict RFC compliance; may harm compatibility

net-irc/psybnc

multinetwork

Adds support for multiple networks

oidentd

Adds support for oidentd

scripting

Adds scripting support

net-irc/quassel

bundled-icons

Use icon themes bundled with Quassel, rather than depending on system packages.

crypt

Support core->network per-channel and per-query blowfish encryption via app-crypt/qca SLOT 2.

dbus

Support desktop notifications via the StatusNotifier D-Bus service (used by most modern desktop environments).

gui

Build the Qt5 GUI client for quassel. If this USE flag is disabled, the GUI is not built, and cannot be used. You might want to disable this on the server, but you need it enabled on the client.

monolithic

Build standalone client with integrated core, no external quasselcore needed. Only useful if you don't want to use Quassel's client/server model. The server and X flags are not needed in this case but it is possible to enable them too.

oxygen

Support the Oxygen icon set that was the default for KDE4.

server

Build the server binary. If this USE flag is disabled, the 'core' server binary for quassel is not built, and cannot be used. You need this enabled on the server, but you might want to disable it on the client.

urlpreview

Use QtWebEngine rendering engine for showing URL thumbnails.

net-irc/rbot

aspell

Use aspell instead of ispell in the "spell" plugin for rbot. The vanilla plugin uses ispell, but enabling this flag makes it use the ispell interface from aspell instead.

cal

Add dependency over a package providing the /usr/bin/cal command, which is needed to enable the "cal" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.

figlet

Add dependency over app-misc/figlet, which is used by the "figlet" plugin for rbot. If the USE flag is disabled the plugin will be unable to use figlet; if toilet is also disabled, the plugin will be disabled.

fortune

Add dependency over games-misc/fortune-mod, which is needed to enable the "fortune" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.

host

Add dependency over net-dns/bind-tools (providing /usr/bin/host), which is needed to enable the "host" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.

nls

Build and install translation for the messages coming from the bot and its plugins (through dev-ruby/ruby-gettext).

timezone

Add dependency over dev-ruby/tzinfo to enable the "time" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.

toilet

Add dependency over app-misc/toilet, which is used by the "figlet" plugin for rbot. If the USE flag is disabled the plugin will be unable to use toilet; if figlet is also disabled, the plugin will be disabled.

translator

Add dependency over dev-ruby/mechanize, which is needed to enable the "translator" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.

net-irc/soju

moderncsqlite

Use moderncsqlite, a cgo-free port of SQLite

net-irc/unrealircd

class-nofakelag

Enable an unsupported class::options flag called “nofakelag” allowing you to grant fakelag exemption to normal user (instead of just opers).

operoverride

Enable OperOverride extension

operoverride-verify

Enable requiring opers to invite themselves to +s/+p channels

prefixaq

Enable chanadmin and chanowner prefixes

showlistmodes

Display channel modes in /LIST (only configured at compiletime)

net-irc/weechat

alias

Enable plugin for alias control

buflist

Enable buflist plugin

charset

Enable encoding conversions

enchant

Enable spell checker plugin via Enchant instead of GNU Aspell

exec

Enable exec plugin

fifo

Enable FIFO support (sh pipes)

fset

Enable fast set plugin

irc

Enable IRC protocol support

logger

Enable support for logging

relay

Enable relay plugin (experimental)

relay-api

Enable json API support for the relay plugin (experimental)

scripts

Build infrastructure for scripting

trigger

Enable trigger plugin

typing

Enable typing plugin

xfer

Enable xfer plugin support

net-irc/znc

argon2

Store password hashes using Argon2id instead of SHA-256

zlib

Enable mod_deflate-like gzip support for znc's web interface using sys-libs/zlib.

net-libs/aqbanking

ebics

Enable support for Electronic Banking Internet Communication Standard (EBICS)

net-libs/axtls

cgi-lua

Enables lua backed cgi for axhttpd server

cgi-php

Enables php backed cgi for axhttpd server

httpd

Enables axhttpd web server component

static

Statically build axhttpd server

net-libs/canlock

header-parser

Build article header parsers

legacy

Build legacy API (v2 compatible)

net-libs/c-client

doc

Install RFCs related to IMAP

topal

Enable support for net-mail/topal for use with mail-client/alpine

net-libs/cvm

vpopmail

Enable vpopmail support

net-libs/czmq

drafts

Build draft API, which may change at any time without any notice, and is therefore not recommended for normal use. (requires draft support in net-libs/zeromq as well)

http-client

Build support for HTTP client using net-misc/curl

http-server

Build support for HTTP server using net-libs/libmicrohttpd

nss

Use dev-libs/nss for SHA instead of an internal implementation

uuid

Enable UUID support using sys-apps/util-linux

net-libs/daq

afpacket

Build the AFPacket data acquisition module. Functions similar to the PCAP module but with better performance. Snort can run unprivileged when using this module. AFpacket supports both inline and passive modes.

dump

Build the Dump data acquisition module. The dump DAQ allows you to test the various inline mode features available in 2.9 Snort like injection and normalization.

ipq

Build the IPQ data acquisition module. IPQ is the old way to process iptables packets for inline deployments. Snort can not run unprivileged when using this module.

nfq

Build the NFQ data acquisition module. NFQ is the new way to process iptables packets for inline deployments. Snort can not run unprivileged when using this module.

pcap

Build the PCAP data acquisition module.

net-libs/davix

tools

Install additional tools

net-libs/freaklabs-chibiarduino

promisc

Enable promisc in the config file for packet sniffing

net-libs/glib-networking

gnome

Extract HTTP/HTTPS/SOCKS proxy configuration stored using GSettings

libproxy

Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration

net-libs/gloox

xhtmlim

expose internal NodeList for optional XHTML-IM rendering without external parser

net-libs/gnome-online-accounts

gnome

Use gnome-base/gnome-control-center to set GNOME online accounts preferences

ms365

Enable Microsoft 365 provider

net-libs/gnutls

dane

Build libgnutls-dane, implementing DNS-based Authentication of Named Entities. Requires net-dns/unbound

openssl

Build openssl compatibility libraries

pkcs11

Add support for PKCS#11 through app-crypt/p11-kit

sslv2

Support for the old/insecure SSLv2 protocol

sslv3

Support for the old/insecure SSLv3 protocol

test-full

Enable full test mode

tls-heartbeat

Enable the Heartbeat Extension in TLS and DTLS

tools

Build cli tools such as gnutls-cli, certtool and oscptool

net-libs/gssdp

man

Generate man page for tools

net-libs/libetpan

liblockfile

Enable support for liblockfile library

lmdb

Use dev-db/lmdb as cache DB

net-libs/libgsasl

gcrypt

Use dev-libs/libgcrypt for low-level crypto

ntlm

Add support for Microsoft's NTLM mechanism using net-libs/libntlm

net-libs/libiio

aio

Enable asynchronous IO support

net-libs/libiscsi

rdma

Enable infiniband support via sys-cluster/rdma-core

net-libs/libisds

openssl

Use dev-libs/openssl as crypto backend instead of app-crypt/gpgme and dev-libs/libgcrypt

net-libs/libktorrent

xfs

Enable XFS specific disk preallocation support via sys-fs/xfsprogs

net-libs/libmicrohttpd

epoll

Support epoll() system call

eventfd

Use EventFD for efficient inter-thread communication

thread-names

Assign thread names to internal threads, useful for dependent apps debugging

net-libs/libnids

glib

Use dev-libs/glib for multiprocessing support

libnet

Include code requiring net-libs/libnet

net-libs/libnma

pkcs11

Enable PKCS#11 support in certificate chooser via app-crypt/gcr

net-libs/liboauth

curl

If enabled, net-misc/curl is used thorugh the libcurl library; if it's not, the curl command is used instead. Some features are only available when using the library, but using it as library requires matching SSL implementations.

net-libs/liboping

filecaps

Allow non-root users to use [n]oping utility.

ncurses

Build ncurses-based version of oping utility (requires sys-libs/ncurses)

net-libs/libpcap

netlink

Use dev-libs/libnl to put wireless interfaces in monitor mode.

rdma

Enable RDMA capture support using sys-cluster/rdma-core

remote

Enable remote packet capture which may expose libpcap-based applications to attacks by malicious remote capture servers!

yydebug

Enable parser debugging code

net-libs/libprotoident

tools

Build and install command-line tools

net-libs/libproxy

duktape

Use dev-lang/duktape for PAC parsing

gnome

Enable support for reading proxy settings from GNOME

net-libs/libqmi

mbim

Support QMI over Mobile Broadband Interface Model (MBIM)

qrtr

Support QMI over IPC Router bus (QRTR)

net-libs/libsoup

gssapi

Enable GSSAPI support

samba

Use net-fs/samba for NTLM Single Sign-On

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

net-libs/libsrtp

aesicm

Use AES ICM cryptographic algorithm

console

Use /dev/console instead of stdout for error messages

nss

Use NSS crypto primitives

openssl

Use OpenSSL crypto primitives

syslog

Use syslog for error messages

net-libs/libssh

gcrypt

Use dev-libs/libgcrypt as TLS provider

gssapi

Enable gssapi support

mbedtls

Use net-libs/mbedtls as TLS provider

pcap

Build with PCAP output support

server

Build with SSH server support

sftp

Build with SFTP support

net-libs/libssh2

gcrypt

Use dev-libs/libgcrypt instead of dev-libs/openssl

mbedtls

Use net-libs/mbedtls instead of dev-libs/openssl

net-libs/libtorrent-rasterbar

dht

Enable DHT (distributed hash table) support

net-libs/libtrace

numa

Use sys-process/numactl

net-libs/libupnp

blocking-tcp

Do not use async socket calls

reuseaddr

Allow clean restarts by binding the socket with SO_REUSEADDR

samples

Install sample applications

net-libs/libvncserver

24bpp

Enable 24bpp support

filetransfer

Enable support for TightVNC's file transfer protocol

lzo

Enable LZO support via dev-libs/lzo instead of using internal miniLZO implementation

net-libs/libwebsockets

access-log

Support generating Apache-compatible access logs

client

The client part of the library and libwebsockets-test-client

extensions

Compile with extensions (permessage-deflate)

generic-sessions

With the Generic Sessions plugin

http-proxy

Support for rewriting HTTP proxying

ipv6

Compile without support for ipv6

lejp

With the Lightweight JSON Parser

libev

Support event loops via dev-libs/libev

libevent

Support event loops via dev-libs/libevent

libuv

Support asynchronous I/O via dev-libs/libuv

mbedtls

Use mbedTLS replacement for OpenSSL

peer-limits

Track peers and restrict resources a single peer can allocate

server-status

Support json + jscript server monitoring

smtp

Provide SMTP support

sqlite3

Require SQLITE3 support

net-libs/loudmouth

asyncns

Use net-libs/libasyncns for asynchronous name resolution.

openssl

Enable dev-libs/openssl support instead of gnutls (which is the default).

net-libs/mbedtls

cmac

Enable block cipher-based message authentication code algorithm

havege

Enable the HAVEGE random generator. Warning: the HAVEGE random generator is not suitable for virtualized environments

programs

Build Mbed TLS programs

net-libs/neon

libproxy

Add support for net-libs/libproxy

pkcs11

Add support for PKCS#11 using dev-libs/pakchois

net-libs/nghttp2

hpack-tools

Install HPACK (header compression) helper tools

utils

Install nghttp, nghttpd and nghttpx

net-libs/ngtcp2

openssl

Provide SSL support using OpenSSL (requires dev-libs/openssl)

net-libs/nodejs

corepack

Enable the experimental corepack package management tool

inspector

Enable V8 inspector

npm

Enable NPM package manager

pax-kernel

Enable building under a PaX enabled kernel

snapshot

Enable snapshot creation for faster startup

system-icu

Use system dev-libs/icu instead of the bundled version

system-ssl

Use system OpenSSL instead of the bundled one

systemtap

Enable SystemTap/DTrace tracing

net-libs/ntirpc

gssapi

Include support for RPCSEC GSS

rdma

Include support for RDMA RPC

net-libs/paho-mqtt-c

high-performance

The debugging aids internal tracing and heap tracking are not included

net-libs/pjproject

amr

Inlcude AMR codec in the build

epoll

Use /dev/epoll ioqueue on Linux (experimental)

g711

Include G.711 codecs in the build

g722

Include G.722 codec in the build

g7221

Include G.722.1 codec in the build

g729

Include G.729 codec via net-libs/bcg729

ilbc

Include iLBC codec in the build

l16

Include Linear/L16 codec family in the build

libyuv

Include libyuv in the build

openh264

Include Open H.264 support in the build

resample

Include resampling implementations in the build

silk

Include SILK support in the build

srtp

Enable support for encrypted voice transmission (secure RTP)

v4l2

Include Video4Linux v2 support in the build

vpx

Include VP8 and VP9 codec support in the build

webrtc

Enable WebRTC support

net-libs/qxmpp

omemo

Enable OMEMO encryption

net-libs/rabbitmq-c

tools

Builds cli tools to interact with brokers

net-libs/rtrlib

ssh

Enable SSH support

net-libs/shairplay

playfair

Add support for handling fairplay handshake (used in for example screen mirroring)

net-libs/tox

av

Adds support for audio and video.

daemon

Enable the DHT Bootstrap Daemon.

dht-node

Enables DHT Bootstrap Node.

experimental

Enables the experimental api

key-utils

Builds utilities to create custom keys and profiles

log-debug

Log level: 4

log-error

Log level: 1

log-info

Log level: 3

log-trace

Log level: 5

log-warn

Log level: 2

net-libs/udns

tools

Build and install dnsget, ex-rdns and rblcheck tools

net-libs/wandio

http

Build support for reading files over HTTP using net-misc/curl

net-libs/webkit-gtk

examples

Install the MiniBrowser example application

gamepad

Enable gamepad input support via dev-libs/libmanette

jumbo-build

Combine source files to speed up build process

net-libs/wvstreams

boost

Use dev-libs/boost to provide TR1-compatible functional interface. This USE flag is only needed with GCC earlier than version 4.1, or with other compilares not providing said interface.

net-libs/xdp-tools

tools

Install various helper tools rather than just libxdp.

net-libs/xrootd

ceph

Enable suport for sys-cluster/ceph (XrdCeph plugin)

fuse

Enable the sys-fs/fuse filesystem driver

http

Enable http protocol support

libxml2

Use dev-libs/libxml2 for XML parsing (preferred) instead of bundled tinyxml

macaroons

Enable support for macaroons with dev-libs/libmacaroons

scitokens

Enable support for scitokens with dev-cpp/scitokens-cpp

server

Install xrootd server and related plug-ins

xrdec

Enable erasure coding support (XrdEc plugin) with dev-libs/isa-l

net-libs/zeromq

drafts

Build draft API, which may change at any time without any notice, and is therefore not recommended for normal use.

libbsd

Use strlcpy() from dev-libs/libbsd instead of internal implementation.

sodium

Use dev-libs/libsodium for cryptography

net-mail/courier-imap

trashquota

include deleted messages, and the Trash folder, in the estimated quota usage for maildirs

net-mail/cyrus-imapd

backup

Enable backup service support

calalarm

Enable CalDAV alarm support

http

Enable http and http/2 support

replication

Enable replication support

server

Enable building server binaries

sieve

Enable sieve support

xapian

Enable Xapian search engine support

net-mail/dbmail

sieve

Enable sieve filter support

net-mail/dovecot

argon2

Add support for ARGON2 password schemes

lucene

Add lucene full text search (FTS) support using dev-cpp/clucene

managesieve

Add managesieve protocol support

rpc

Add support for NFS quotas

sieve

Add sieve support

solr

Add solr full text search (FTS) support

stemmer

Add libstemmer support (for FTS)

textcat

Add libtextcat language guessing support for full text search (FTS)

net-mail/fetchmail

socks

Enable support for socks proxy

tk

Enable support for Tk GUI toolkit, in particular it installs fetchmailconf

net-mail/gnubiff

password

Enable save passwords to connect mail servers in user space

net-mail/lbdb

abook

Enables app-misc/abook support

bbdb

Include support for app-emacs/bbdb

evo

Add support for mail-client/evolution

finger

Enables finger support

net-mail/mailgraph

nginx

Add nginx support

net-mail/mailutils

clients

Build client programs - frm maidag mail sieve messages readmsg dotlock movemail mimeview mh

kyotocabinet

Enable Kyoto Cabinet database support

servers

Build server programs - imap4d pop3d comsatd

tokyocabinet

Enable Tokyo Cabinet database support

net-mail/mboxgrep

dmalloc

Enable debugging using dev-libs/dmalloc

net-mail/mu

emacs

Install the mu4e mail client

net-mail/notmuch

apidoc

Provide doxygen generated API docs

crypt

Support decryption and verification of PGP/MIME messages and in Emacs UI - encryption; support also S/MIME signature verification since version 0.22

doc

Install API documentation

emacs

Install Emacs UI (the main one)

mutt

Install helper script for Mutt

nmbug

Install experimental tag sharing / pseudo-bug-tracking script for Notmuch (see http://notmuchmail.org/nmbug/)

net-mail/qmailadmin

maildrop

Filter spam using maildrop

net-mail/tpop3d

authexternal

Enable authentication by an external program

flatfile

Enable authentication against /etc/passwd-style flat files

passwd

Enable /etc/passwd authentication

sha1

Use OpenSSL for sha1 encrypted passwords.

shadow

Enable /etc/shadow authentication

net-mail/vpopmail

clearpasswd

Enables cleartext password storage in the vpasswd files

ipalias

Enables enable-ip-alias-domains

maildrop

Enables mail-filter/maildrop support in vdelivermail

spamassassin

Enables mail-filter/spamassassin support

net-misc/apt-cacher-ng

fuse

Install the sys-fs/fuse based acngfs, to use a userspace filesystem for the apt cache.

net-misc/AQtion

lro

Enable/disable Large Receive Offload. This MUST be disabled for bridging or forwarding.

net-misc/aria2

bittorrent

Enable support for the bittorrent protocol.

gnutls

Use net-libs/gnutls as TLS provider (preferred). Otherwise, dev-libs/openssl will be used as TLS provider. Both apply only with USE=ssl.

libuv

Use dev-libs/libuv backend.

libxml2

Use dev-libs/libxml2 for XML parsing (preferred) instead of dev-libs/expat.

metalink

Enable support for metalink.

nettle

Use dev-libs/nettle for message digests, plus dev-libs/gmp for bittorrent (if enabled). If this flag is disabled, dev-libs/libgcrypt is used instead. This flag is ignored if dev-libs/openssl is used.

scripts

Install additional scripts which use aria2's xmlrpc functionality.

ssh

Enable SFTP support.

net-misc/asterisk

blocks

Utlize -fblocks (only supported by, and required when using, clang/LLVM)

cluster

Enable high-availability support through the Corosync Cluster Engine

codec2

Enable Codec2 support in asterisk

deprecated

Enable deprecated features (eg, app_macro)

gtalk

Enable support for Google Talk services

http

Enable embedded web server

ilbc

Enable the Internet Low Bitrate Codec (iLBC)

newt

Include additional tools that require redhats windowing toolkit

pjproject

Enable support for pjproject (pjsip)

span

Enable support for the spandsp codec

srtp

Enable support for encrypted voice transmission (secure RTP)

statsd

Enable statsd integration

unbound

Enable improved DNS core (SRV, NAPTR) by use of libunbound

net-misc/asterisk-core-sounds

alaw

Install the sounds files for the alaw codec.

g722

Install the sounds files for the g722 codec.

g729

Install the sounds files for the g729 codec.

siren14

Install the sounds files for the siren14 codec.

siren7

Install the sounds files for the siren7 codec.

sln16

Install the sounds files for the sln16 codec.

ulaw

Install the sounds files for the ulaw codec.

wav

Install the sounds files for the wav codec.

net-misc/asterisk-extra-sounds

alaw

Install the sounds files for the alaw codec.

g722

Install the sounds files for the g722 codec.

g729

Install the sounds files for the g729 codec.

gsm

Install the sounds files for the gsm codec.

siren14

Install the sounds files for the siren14 codec.

siren7

Install the sounds files for the siren7 codec.

sln16

Install the sounds files for the sln16 codec.

ulaw

Install the sounds files for the ulaw codec.

wav

Install the sounds files for the wav codec.

net-misc/asterisk-moh-opsound

alaw

Install the sounds files for the alaw codec.

g722

Install the sounds files for the g722 codec.

g729

Install the sounds files for the g729 codec.

gsm

Install the sounds files for the gsm codec.

siren14

Install the sounds files for the siren14 codec.

siren7

Install the sounds files for the siren7 codec.

sln16

Install the sounds files for the sln16 codec.

ulaw

Install the sounds files for the ulaw codec.

wav

Install the sounds files for the wav codec.

net-misc/bird

client

Build the ncurses/readline full featured CLI

libssh

Enables net-libs/libssh binding, mendatory for RPKI support

net-misc/casync

fuse

Enable fuse support

net-misc/cgminer

ants1

Enable support for Antminer S1 Bitmain

ants2

Enable support for Antminer S2 Bitmain

ants3

Enable support for Antminer S3 Bitmain

avalon

Enable support for Avalon ASICs

avalon2

Enable support for Avalon2 ASICs

avalon4

Enable support for Avalon4 ASICs

avalon7

Enable support for Avalon7 ASICs

avalon-miner

Enable support for Avalon miner ASICs

bab

Enable support for BlackArrow Bitfury

bflsc

Enable support for BFL ASICs

bitforce

Enable support for mining with ButterFly Labs BitFORCE FPGAs

bitfury

Enable support for mining with BitFury ASICs

bitmine_A1

Enable support for mining with Bitmine.ch A1 ASICs

blockerupter

Enable support for mining with BlockRupter ASICs

cointerra

Enable support for mining with Cointerra ASICs

drillbit

Enable support for mining with Drillbit BitFury ASICs

hashfast

Enable support for mining with Hashfast

hashratio

Enable support for mining with Hashratio

icarus

Enable support for mining with Icarus FPGAs

klondike

Enable support for mining with Klondik ASICs

knc

Enable support for mining with KnC miners

minion

Enable support for mining with BlackArrow Bitfury

modminer

Enable support for mining with ModMiner FPGAs

sp10

Enable support for Spondoolies SP10

sp30

Enable support for Spondoolies SP30

net-misc/chrony

cmdmon

Support for command and monitoring

debug

Get DEBUG_LOG output from chronyd when passing -dd parameter

html

Install HTML documentation

libtomcrypt

Support different hashes via dev-libs/libtomcrypt

nettle

Use dev-libs/nettle for hash functions or nts

nss

Use dev-libs/nss for hash functions

ntp

Support for the Network Time Protocol (NTP)

nts

Support for Network Time Security (NTS). Uses net-libs/gnutls

phc

Support for the PTP (Precision Time Protocol) Hardware Clock (PHC) interface

pps

Support for the Linux Pulse Per Second (PPS) interface

refclock

Support for reference clocks

rtc

Support for the Linux Real Time Clock interface

sechash

Enable support for hashes other than MD5

net-misc/connman

ethernet

Enable ethernet support.

iptables

Use net-firewall/iptables as firewall.

iwd

Enable wifi support via net-wireless/iwd

l2tp

Use net-dialup/xl2tpd for L2TP VPN support.

nftables

Use net-firewall/nftables as firewall.

ofono

Use net-misc/ofono for telephony support.

openconnect

Use net-vpn/openconnect for VPN support.

openvpn

Use net-vpn/openvpn for openvpn support.

pptp

Use net-dialup/pptpclient for PPTP VPN support.

tools

Enable testing tools.

vpnc

Use net-vpn/vpnc for cisco VPN support.

wireguard

Enable WireGuard VPN support.

wispr

Enable support for WISPr hotspot logins.

net-misc/connman-gtk

openconnect

Support easier authentication to AnyConnect VPNs

net-misc/curl

alt-svc

Enable alt-svc support

ftp

Enable FTP support

gnutls

Enable gnutls ssl backend

gopher

Enable Gopher protocol support

hsts

Enable HTTP Strict Transport Security

http3

Enable HTTP/3 support

imap

Enable Internet Message Access Protocol support

mbedtls

Enable mbedtls ssl backend

nghttp3

Enable HTTP/3 support using net-libs/nghttp3

openssl

Enable openssl ssl backend

pop3

Enable Post Office Protocol 3 support

progress-meter

Enable the progress meter

psl

Enable Public Suffix List (PSL) support. See https://daniel.haxx.se/blog/2024/01/10/psl-in-curl/.

quic

Enable support for QUIC (RFC 9000); a UDP-based protocol intended to replace TCP

rtmp

Enable RTMP Streaming Media support

rustls

Enable Rustls ssl backend

smtp

Enable Simple Mail Transfer Protocol support

ssh

Enable SSH urls in curl using libssh2

ssl

Enable crypto engine support (via openssl if USE='-gnutls -nss')

sslv3

Support for the old/insecure SSLv3 protocol

telnet

Enable Telnet protocol support

tftp

Enable TFTP support

websockets

Enable websockets support

net-misc/dhcp

client

Install the dhclient program

server

Install the dhcpd and dhcrelay programs

net-misc/dhcpcd

embedded

Embed the definitions of dhcp options in the dhcpcd executable

privsep

Enable support for privilege separation

net-misc/dibbler

resolvconf

Use resolvconf to handle /etc/resolv.conf updates

net-misc/dropbear

bsdpty

Add support for legacy BSD pty's rather than dynamic UNIX pty's -- do not use this flag unless you are absolutely sure you actually want it

legacy-ciphers

Enable support for deprecated, soon-to-be-dropped DSA keys. See https://marc.info/?l=openssh-unix-dev>m=170494903207436>w=2.

multicall

Build all the programs as one little binary (to save space)

shadow

Enable shadow password support

test-async

Enable tests using dev-python/asyncssh

net-misc/dropbox-cli

gpg

Use app-crypt/gpgme to verify signatures

net-misc/electrum

cli

Enables the CLI interface

qrcode

Enable QR code scanning with media-gfx/zbar

net-misc/electrum-ltc

cli

Enables the CLI interface

qrcode

Enable QR code scanning with media-gfx/zbar

net-misc/etherdfs

tsr

Install the precompiled TSR program for DOS, which acts as a client.

net-misc/ethflop

tsr

Build the TSR program for DOS, which acts as a client.

net-misc/eventd

libcanberra

Enable plugin for sounds via media-libs/libcanberra

libnotify

Enable plugin to relay events to notification daemon (Note: not required for local notifications via net-misc/eventd)

notification

Enable plugin to display on-screen notifications

purple

Enable plugin for IM notifications via libpurple

webhook

Enable plugin to send payloads to webhook handlers

websocket

Enable support for WebSocket protocol

net-misc/fatrat

bittorrent

Use the bittorrent protocol via net-libs/libtorrent-rasterbar.

net-misc/freerdp

aad

Enable login via Azure AD

client

Build client binaries

fuse

Clipboard with FUSE file copy support

openh264

Enable H.264 support using media-libs/openh264

server

Build server binaries

net-misc/frr

fpm

Enable Forwarding Plane Manager support

grpc

Enable gRPC plugin

nhrp

Build Next Hop Resolution Protocol daemon

ospfapi

Build OSPFAPI support

pam

Add support for PAM (via sys-libs/pam) to the Virtual Terminal Interface Shell (vtysh)

rpki

Enable RPKI

net-misc/geckodriver

unchained

Apply the geckodriver-unchained patch, for Gecko-based non-Firefox browsers (e.g. Librewolf)

net-misc/gerbera

curl

Support HTTP media sources (e.g. internet radio)

exiv2

Use media-gfx/exiv2 to extract EXIF information

ffmpegthumbnailer

Enable video thumbnail support with media-video/ffmpegthumbnailer

mysql

Use dev-db/mysql as backend rather than SQLite3

taglib

Use media-libs/taglib for reading files' metadata

net-misc/gnome-remote-desktop

aac

Use media-libs/fdk-aac for audio output redirection of the RDP backend

net-misc/gsasl

client

Build client component

gcrypt

Use dev-libs/libgcrypt for low-level crypto

ntlm

Add support for Microsoft's NTLM mechanism using net-libs/libntlm

server

Build server component

net-misc/htbinit

esfq

Add support for Enhanced Stochastic Fairness queueing discipline.

net-misc/hylafaxplus

html

Convert faxes into html email

jbig

JBIG Fax Compression Support

mgetty

Receive faxes via serial port connections

pam

hfaxd authentication via PAM

net-misc/icaclient

hdx

Install and enable hdx-realtime-media-engine plugin

usb

Allow connecting USB devices to virtual desktops

net-misc/icecast

kate

Add karaoke and text encapsulation support for Ogg files

yp

Build support for yp public directory listings

net-misc/inetutils

net-misc/iputils

arping

Build and install arping -- tool for sending ARP requests to peers (see also net-analyzer/arping)

clockdiff

Build and install clockdiff -- tool for comparing clocks via ICMP packets

rarpd

Build and install rarpd -- server for handling RARP (reverse ARP) requests; generally only used by old systems

rdisc

Build and install rdisc -- server for the client side of the ICMP router discover protocol

tracepath

Build and install tracepath -- tool for tracing network paths for discovering MTU values

net-misc/kafka-bin

connect

Install init for Kafka Connect Distributed mode

internal-zookeeper

Use bundled local zookeeper instance

net-misc/kafkacat

avro

Enable avro serialization/deserialization support

json

Enable json support

net-misc/kea

openssl

Use dev-libs/openssl instead of dev-libs/botan

samples

Install sample configuration files

shell

Install kea-shell text management client for Control Agent

net-misc/knock

server

Installs the knockd server daemon.

net-misc/libteam

zmq

Build witch net-libs/zeromq support

net-misc/lldpd

cdp

Enable Cisco Discovery Protocol

dot1

Enable Dot1 extension (VLAN stuff)

dot3

Enable Dot3 extension (PHY stuff)

edp

Enable Extreme Discovery Protocol

fdp

Enable Foundry Discovery Protocol

graph

Create dot graphs in documentations

lldpmed

Enable LLDP-MED extension

old-kernel

Enable compatibility with Linux kernel older than 2.6.39

sanitizers

Enable code instrumentation with selected sanitizers

snmp

Enable the use of SNMP

sonmp

Enable SynOptics Network Management

net-misc/memcached

slabs-reassign

Allow manual reassignment of memory slabs at the cost of slab optimizations.

net-misc/minidlna

netgear

Enable netgear branding

readynas

Enable readynas branding

net-misc/miniupnpd

igd2

Build for IGDv2 instead of an IGDv1

leasefile

Enable lease file.

nftables

Use net-firewall/nftables rather than net-firewall/iptables.

pcp-peer

Enable support for PCP-PEER to allow NAT-PMP clients to mangle their packets.

portinuse

Check if a port is in use before allowing a NAT-PMP client to map it.

strict

Be more strict regarding compliance with UPnP specifications.

net-misc/modemmanager

mbim

Enable MBIM modem protocol

qmi

Enable support for the QMI modem protocol used by devices with Qualcomm chipsets

qrtr

Enable support for the QMI over IPC Router bus (QRTR) protocol

net-misc/moonlight

cuda

Enable accelerated video rendering on NVIDIA hardware

embedded

Optimize UI for fullscreen non-desktop usage

glslow

Prefer direct KMS/DRM rendering over EGL/GLES rendering for better performance on some weaker GPUs

libdrm

Enable video rendering via x11-libs/libdrm

soundio

Enable sound output via media-libs/libsoundio instead of media-libs/libsdl2

vkslow

Prefer hardware YUV-RGB conversion and scaling over Vulkan for better performance on some weaker GPUs

net-misc/mosh

client

Build network client

examples

Include example scripts

mosh-hardening

Enable compiler and linker options to frustrate memory corruption exploits

nettle

Use dev-libs/nettle for some cryptographic functions instead of dev-libs/openssl. With Nettle, some of mosh's own code is used for OCB.

server

Build network server

ufw

Install net-firewall/ufw rule set

utempter

Include libutempter support

net-misc/mulk

checksum

Enable checksum verification for Metalink from dev-libs/openssl

metalink

Enable support for media-libs/libmetalink

net-misc/netifrc

dhcp

Allow interfaces to configure via DHCP

net-misc/netkit-bootparamd

libtirpc

Build against net-libs/libtirpc for RPC support

net-misc/networkmanager

concheck

Enable connectivity checking support

connection-sharing

Support connection sharing (uses net-dns/dnsmasq)

dhclient

Use dhclient from net-misc/dhcp for getting an IP via DHCP

dhcpcd

Use net-misc/dhcpcd for getting an IP

elogind

Use sys-auth/elogind for session tracking

iptables

Use net-firewall/iptables for connection sharing

iwd

Use net-wireless/iwd instead of net-wireless/wpa_supplicant for wifi support by default

modemmanager

Enable support for mobile broadband devices using net-misc/modemmanager

nftables

Use net-firewall/nftables for connection sharing

nss

Use dev-libs/nss for cryptography

ofono

Use net-misc/ofono for telephony support.

ovs

Enable OpenVSwitch support

ppp

Enable support for mobile broadband and PPPoE connections using net-dialup/ppp

psl

Use public suffix list via net-libs/libpsl

resolvconf

Use net-dns/openresolv for managing DNS information in /etc/resolv.conf. Generally, a symlink to /run/NetworkManager/resolv.conf is simpler. On systems running systemd-resolved, disable this flag and create a symlink to /run/systemd/resolve/stub-resolv.conf.

teamd

Enable Teamd control support

tools

Build cli tools such as nmcli, nmtui and nm_cloud_setup

wext

Enable support for the deprecated Wext (Wireless Extensions) API; needed for some older drivers (e.g. ipw2200, ndiswrapper)

wifi

Enable support for wifi and 802.1x security

net-misc/nextcloud-client

dolphin

Install the kde-apps/dolphin extension

nautilus

Install the gnome-base/nautilus extension

webengine

Enable old Flow1 login using dev-qt/qtwebengine

net-misc/ntp

openntpd

Allow ntp to be installed alongside openntpd

parse-clocks

Add support for PARSE clocks

samba

Provide support for Samba's signing daemon (needed for Active Directory domain controllers)

net-misc/ntpsec

arbiter

Arbiter 1088A/B GPS driver

early

Drop root privileges early

gdb

Enable debugging with gdb

generic

Enable support for generic time radios and GPSDOs

gpsd

Enable gpsd daemon support

heat

Install contrib heat generating scripts

hpgps

Hewlett Packard GPS driver

jjy

JJY driver

libbsd

Use libbsd instead of internal funcs

local

Support for undisciplined local clock (not recommended)

modem

NIST/USNO/PTB Modem Time Services

nist

Set local clock deps

nmea

NMEA GPS driver

ntpviz

Make visualizations of offsets, jiffies, etc.

oncore

Oncore driver

pps

PPS cesium clock driver

rclock_arbiter

Arbiter 1088A/B GPS driver

rclock_generic

Enable support for generic time radios and GPSDOs

rclock_gpsd

Enable gpsd daemon support

rclock_hpgps

Hewlett Packard GPS driver

rclock_jjy

JJY driver

rclock_local

Support for undisciplined local clock (not recommended)

rclock_modem

NIST/USNO/PTB Modem Time Services

rclock_nmea

NMEA GPS driver

rclock_oncore

Oncore driver

rclock_pps

PPS cesium clock driver

rclock_shm

Obtain refclock info from shared memory-segment

rclock_spectracom

Spectracom driver

rclock_trimble

Trimble driver

rclock_truetime

Trutime driver (deprecated)

rclock_zyfer

Zyfer driver

shm

Obtain refclock info from shared memory-segment

smear

Specify the interval over which a leap second is applied (experimental)

spectracom

Spectracom driver

trimble

Trimble driver

truetime

Trutime driver (deprecated)

zyfer

Zyfer driver

net-misc/ofono

atmodem

ETSI AT modem support.

bluetooth

Enable Bluetooth modem support using net-wireless/bluez.

cdmamodem

Enable CDMA modem support.

datafiles

Enable install configuration and data files.

dundee

Enable BlueTooth DUN deamon support.

isimodem

Enable PhoNet/ISI modem support.

phonesim

Enable phone Simulator support

provision

Enable GPRS provisioning support

qmimodem

Enable Qualcomm QMI modem support

tools

Enable testing tools

net-misc/oidentd

masquerade

Enable support for masqueraded/NAT connections

net-misc/olsrd

pud

Install the Node Position Update plugin

net-misc/openntpd

constraints

Enable HTTPS TLS time constraint support

net-misc/openssh

ldns

Use LDNS for DNSSEC/SSHFP validation.

legacy-ciphers

Enable support for deprecated, soon-to-be-dropped DSA keys. See https://marc.info/?l=openssh-unix-dev>m=170494903207436>w=2.

livecd

Enable root password logins for live-cd environment.

security-key

Include builtin U2F/FIDO support

ssl

Enable additional crypto algorithms via OpenSSL

xmss

Enable XMSS post-quantum authentication algorithm

net-misc/openssh-contrib

hpn

Enable high performance ssh

ldns

Use LDNS for DNSSEC/SSHFP validation.

livecd

Enable root password logins for live-cd environment.

security-key

Include builtin U2F/FIDO support

ssl

Enable additional crypto algorithms via OpenSSL

X509

Adds support for X.509 certificate authentication

xmss

Enable XMSS post-quantum authentication algorithm

net-misc/openvswitch

monitor

Build the Python and GUI dependent monitor applications

net-misc/owncloud-client

dolphin

Install the kde-apps/dolphin extension

nautilus

Install the gnome-base/nautilus extension

net-misc/packETH

cli

Build and install packETHcli

net-misc/plowshare

view-captcha

View captcha with aview

net-misc/ps3mediaserver

multiuser

Allow renderer customization per-user.

transcode

Install optional dependencies for transcoding support via media-video/mplayer

tsmuxer

Install optional dependencies for transcoding support via media-video/tsmuxer

net-misc/ptpd

debug

Enable debugging informations

experimental

Enable experimental features

ntp

Enable NTPD cooperation

pcap

Require net-libs/libpcap to allow layer 2 (raw Ethernet) transport

slave-only

Enable slave only operation (remove master mode functionality)

snmp

Require net-analyzer/net-snmp to enable SNMP configuration

statistics

Enable compution of statistics

net-misc/putty

gssapi

Enable support for GSSAPI (virtual/krb5)

gtk

Build the PuTTY client which requires x11-libs/gtk+. If disabled only the CLI tools puttygen, plink, pscp and psftp will be built

net-misc/r8125

multi-tx-q

Enable Multiple Tx Queue ("RSS" for sending)

ptp

Enable Precision Time Protocol support

rss

Enable Receive Side Scaling (RSS)

use-firmware

Support automatic firmware loading

net-misc/r8152

center-tap-short

Enable support for center tap short

net-misc/r8168

use-firmware

Enable support for automatic firmware loading

net-misc/rdesktop

kerberos

Enable CredSPP support + Kerberos authentication

pcsc-lite

Enable smartcard support with sys-apps/pcsc-lite driver

xrandr

Enable XRandR window extension support

net-misc/remmina

gvnc

Enable GVNC plugin using gtk-vnc, suitable for KVM and Vino servers

kwallet

Enable KDE Wallet plugin

spice

Support connecting to SPICE-enabled virtual machines

ssh

Enable support for SSH/SFTP protocol

net-misc/rsync

rrsync

Install rrsync script to setup restricted rsync users via ssh logins

stunnel

Provide helper scripts for using rsync via >=net-misc/stunnel-4

system-zlib

Use system zlib instead of bundled one. This is incompatible with older rsync releases!

xxhash

Enable dev-libs/xxhash support for hashing

net-misc/rygel

tracker

Install dependencies for the tracker plugin

transcode

Install dependencies for transcoding support

net-misc/scponly

chroot

Enables adding and configuring an 'scponlyc' chrooted user

gftp

Enables gFTP compatibility

logging

Enables SFTP logging compatibility

passwd

Enables passwd compatibility

quota

Enables quota compatibility

rsync

Enables rsync compatibility with potential security risks

scp

Enables scp compatibility with potential security risks

sftp

Enables SFTP compatibility

subversion

Enables Subversion compatibility with potential security risks

unison

Enables Unison compatibility with potential security risks

wildcards

Enables wildcard processing with potential security risks

winscp

Enables WinSCP 2.0 compatibility with potential security risks

net-misc/seafile-client

shibboleth

Build support for Shibboleth single sign-on

net-misc/sipp

pcap

Enable functionality to replay RTP data from a pcap file

net-misc/sitecopy

rsh

This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred.

webdav

Enable WebDav (Web-based Distributed Authoring and Versioning) support. This system allows users to collaborate on websites using a web based interface. See the ebuild for an FAQ page. Enables neon as well to handle webdav support.

net-misc/sks

optimize

Enables bytecode optimization

net-misc/smb4k

discovery

Build with net-libs/kdsoap-ws-discovery-client support to discover domains and workgroups

net-misc/sntpd

adjtimex

Install adjtimex for the clock adjustment algorithm.

net-misc/spice-gtk

gtk3

Build the spice client (spicy), requires x11-libs/gtk+:3

mjpeg

Enable builtin mjpeg video decoder

policykit

Enable sys-auth/polkit support for the usbredir acl helper

usbredir

Use sys-apps/usbredir to redirect USB devices to another machine over TCP

webdav

Support for folder-sharing between guest and client using net-libs/phodav

net-misc/sshrc

mosh

Install Support for mosh

net-misc/sslh

libev

Support event loops via dev-libs/libev

net-misc/streamtuner

shout

Enable shoutcast plug-in.

xiph

Enable xiph.org plug-in.

net-misc/stunnel

stunnel3

Install the stunnel3 wrapper.

net-misc/sunshine

cuda

Enable accelerated video encoding on NVIDIA hardware

libdrm

Enable video encoding via x11-libs/libdrm

svt-av1

Enables software AV1 encoding via media-libs/svt-av1

trayicon

Enable system tray icon

x264

Enable software H.264 encoding via media-libs/x264

x265

Enable software HEVC encoding via media-libs/x265

net-misc/tigervnc

dri3

Build with DRI3 support

drm

Build with DRM support

java

Build TigerVNC Java viewer

server

Build TigerVNC server

viewer

Build TigerVNC viewer

net-misc/tinyssh

sodium

Use dev-libs/libsodium for cryptography

net-misc/turbovnc

server

Build the server (vncserver, Xvnc)

viewer

Build the viewer (vncviewer)

net-misc/uftp

server

Install uftp server daemon

net-misc/vde

pcap

Enable the pcap-based plugin that allows creating a switch against a real interface.

net-misc/wget

cookie-check

Enable cookie checks via net-libs/libpsl

libproxy

Support for automatic proxy configuration management through net-libs/libproxy.

metalink

Enable support for media-libs/libmetalink

ntlm

Enable support for NTLM (Windows-based) authorization

uuid

Generate UUIDs for the WARC (Web ARChive file format) using libuuid; otherwise use a simple RNG (random number generator)

net-misc/wget2

gpgme

Build app-crypt/gpgme backend

openssl

Enable crypto support via dev-libs/openssl

psl

Use public suffix list via net-libs/libpsl

net-misc/whois

xcrypt

Enable crypt through sys-libs/libxcrypt package

net-misc/x2goserver

fuse

Use net-fs/sshfs to allow shared folders

net-misc/xmrig

donate

Set the default donation level to 1% instead of 0

hwloc

Use sys-apps/hwloc for CPU affinity support

net-misc/youtube-viewer

gtk

Install the gtk3 GUI

net-misc/ytfzf

minimal

Skip all optional dependencies (may no longer work out-of-the-box and require custom setting up)

thumbnails

Pull media-gfx/ueberzugpp or media-gfx/ueberzug for viewing thumbnails (default method when using -t)

net-misc/zerotier

sso

Enable support for Single sign-on through zeroidc

net-nds/389-ds-base

accountpolicy

Enable account policy plugin - automatically lock an account after a certain amount of time has elapsed

autobind

Enable auto bind over unix domain socket (LDAPI) support

auto-dn-suffix

Enable auto bind with auto dn suffix over unix domain socket (LDAPI) support

bitwise

Enable bitwise plugin - supported data in raw/bitwise format

dna

Enable dna (distributed numeric assignment ) plugin - to automatically assign unique uid numbers to new user entries as they are created.

ldapi

Enable LDAP over unix domain socket (LDAPI) support

pam-passthru

Enable pam-passthru plugin - for simple and fast system services used in ldap

net-nds/ldapvi

gnutls

Use net-libs/gnutls instead of dev-libs/openssl

net-nds/nsscache

nsscache

Depend on sys-auth/libnss-cache to handle flat files

s3

Support for S3-based NSS sources

net-nds/openldap

argon2

Enable password hashing algorithm from app-crypt/argon2

autoca

Automatic Certificate Authority overlay

cleartext

Enable use of cleartext passwords

experimental

Enable experimental backend options

kinit

Enable support for kerberos init

minimal

Build libraries & userspace tools only. Does not install any server code

odbc

Enable ODBC and SQL backend options

overlays

Enable contributed OpenLDAP overlays

pbkdf2

Enable support for pbkdf2 passwords

sha2

Enable support for pw-sha2 password hashes

smbkrb5passwd

Enable overlay for syncing ldap, unix and lanman passwords

net-nds/rpcbind

remotecalls

Enable remote calls

warmstarts

Enables rpcbind to cache configuration for warm restarts

net-news/rssguard

libmpv

Enable media player support via libmpv from media-video/mpv

qtmultimedia

Enable media player support via dev-qt/qtmultimedia

webengine

Use dev-qt/qtwebengine for embedded web browser

net-news/sfeed

theme-mono

Use mono theme

theme-mono-highlight

Use mono_highlight theme

theme-newsboat

Use newsboat theme

theme-templeos

Use templeos theme

net-nntp/nzbget

parcheck

Enable support for checking PAR archives

net-nntp/slrn

canlock

Add support for cancel locks via net-libs/canlock

uudeview

Add support for yEnc coding and more using dev-libs/uulib

net-nntp/tin

cancel-locks

Enable Cancel-Lock header functionality

gpg

Enable app-crypt/gnupg support

libtls

Prefer dev-libs/libretls as SSL/TLS provider (ineffective with USE=-ssl)

net-p2p/airdcpp-webclient

nat-pmp

Enable support for the NAT-PMP protocol

tbb

Enable support of the TBB library to improve performance

webui

Enable the Web UI

net-p2p/amule

daemon

Enable amule daemon

remote

Enable remote controlling of the client

stats

Enable statistic reporting

net-p2p/bitcoin-core

berkdb

Support legacy wallets in Berkeley DB format

bitcoin-cli

Build and install bitcoin-cli command line interface

cli

Build and install bitcoin-cli command line interface

daemon

Build and install bitcoind daemon

external-signer

Include support for external wallet signer programs

gui

Build and install Bitcoin-Qt GUI

libs

Build and install libbitcoinconsensus

nat-pmp

Enable NAT-PMP port forwarding

qrcode

Enable generation of QR Codes for receiving payments

sqlite

Support descriptor wallets in SQLite format

system-leveldb

Link with virtual/bitcoin-leveldb rather than embedding an internal copy

system-libsecp256k1

Link with dev-libs/libsecp256k1 rather than embedding an internal copy

systemtap

Enable SystemTap/DTrace tracing

test-full

Run tests that take a long time

upnp

Enable Universal Plug and Play

zeromq

Report blocks and transactions via zeromq

net-p2p/bitcoind

external-signer

Include support for external wallet signer programs

nat-pmp

Enable NAT-PMP port forwarding

systemtap

Enable SystemTap/DTrace tracing

upnp

Enable Universal Plug and Play

wallet

Enable wallet support

zeromq

Report blocks and transactions via zeromq

net-p2p/bitcoin-qt

external-signer

Include support for external wallet signer programs

nat-pmp

Enable NAT-PMP port forwarding

qrcode

Enable generation of QR Codes for receiving payments

systemtap

Enable SystemTap/DTrace tracing

upnp

Enable Universal Plug and Play

wallet

Enable wallet support

zeromq

Report blocks and transactions via zeromq

net-p2p/dbhub

switch-user

Enable support for switching user

net-p2p/deluge

console

Enable default console UI

webinterface

Install dependencies needed for the web interface

net-p2p/eiskaltdcpp

cli

Enable sample cli based on readline

daemon

Enable eiskaltdcpp-daemon

dht

Enable DHT (distributed hash table) support for libeiskaltdcpp

libcanberra

Enable sound notifications support over libcanberra in EiskaltDC++ Gtk

minimal

Don't install headers

net-p2p/fms

frost

Add support for frost boards

ssl

Add support for FCP connection over SSL

net-p2p/freenet

nss

Use nss for crypto operations, if it is the fastest way

net-p2p/go-ethereum

devtools

Build Ethereum development tools (evm, abigen, puppeth, ...)

net-p2p/ktorrent

bwscheduler

Schedule upload and download limits over a period of a week

downloadorder

Specify the download order of a multi-file torrent

infowidget

Displays general information about a torrent in several tabs

ipfilter

Filter IP addresses through a blocklist

logviewer

Displays the logging output

magnetgenerator

Generates magnet URI's

mediaplayer

Phonon-based media player

rss

Syndication plugin for KTorrent, supporting RSS and Atom feeds

scanfolder

Scan folders for torrent files and load them

shutdown

Shutdown when done

stats

Shows statistics about torrents in several graphs

upnp

Forward ports using UPnP

webengine

Embedded search for torrents using dev-qt/qtwebengine

zeroconf

Discover peers on the local network using the Zeroconf protocol

net-p2p/mldonkey

bittorrent

enable bittorrent support

fasttrack

enable fasttrack support

gnutella

enable gnutella and gnutella2 support

net-p2p/qbittorrent

webui

Install qBittorrent Web UI (qbittorrent-nox) and systemd/OpenRC service

net-p2p/retroshare

cli

Enables terminal login support for retroshare-service

jsonapi

Enables the new RetroShare JSON API

libupnp

Enables UPnP port forwarding via net-libs/libupnp

miniupnp

Enables UPnP port forwarding via net-libs/miniupnpc

plugins

Enables plugin support

service

Enables the new RetroShare service

sqlcipher

Enables GXS database encryption via SQLCipher

net-p2p/syncthing

tools

Install stdiscosrv, strelaysrv and other tools to /usr/libexec/syncthing/.

net-p2p/transmission

cli

Build command-line client

debug

Enable assertions

mbedtls

Use mbed TLS instead of OpenSSL

net-p2p/transmission-remote-gtk

libproxy

Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration.

net-print/cups

openssl

Use dev-libs/openssl instead of net-libs/gnutls for TLS support

net-print/cups-filters

foomatic

Build the included foomatic-rip printer driver. Strongly recommended.

pclm

Enable PCLm support

net-print/cups-meta

browsed

Include support for the cups-browsed daemon.

foomatic

Include support for the foomatic-rip printer driver. Strongly recommended.

poppler

Include support for the app-text/poppler filters.

net-print/dymo-cups-drivers

usb-modeswitch

Include usb_modeswitch for some hardware (bug #601242)

net-print/fax4cups

efax

Install net-misc/efax backend

hylafax

Install net-misc/hylafax backend

mgetty-fax

Install net-dialup/mgetty backend

net-print/hplip

fax

Enable fax on multifunction devices which support it

hpcups

Build the hpcups driver for cups (by HP)

hpijs

Build the IJS driver for cups (Foomatic)

kde

Enables kde-misc/skanlite as scanner GUI with USE="scanner X"

libusb0

Depend on virtual/libusb SLOT 0. Some old printers do not work with virtual/libusb SLOT 1.

minimal

Only build internal hpijs/hpcups driver (not recommended at all, make sure you know what you are doing)

parport

Enable parallel port for devices which require it

scanner

Enable scanner on multifunction devices which support it

snmp

Add support for net-analyzer/net-snmp which enables this driver to work over networks (both for server and client)

static-ppds

Use statically-generated PPDs instead of Dynamic PPDs. Although this is deprecated some printers may still need it to work properly. Use this flag if hp-setup fails to find/create a valid PPD file

X

Enables scanner GUI dependencies with USE="scanner" where media-gfx/xsane is preferred over media-gfx/sane-frontends

net-print/hplip-plugin

orblite

Install the ORBlite scanner plugin

net-print/kyocera-1x2x-mfp-driver

rastertokpsl-fix

Use custom wrapper script to sanitize arguments before passing to 'rastertokpsl' filter program

net-print/libcupsfilters

poppler

Build the pdftoraster filter

net-print/libppd

poppler

Use the app-text/poppler pdftops filter

net-proxy/haproxy

51degrees

Device Detection using 51 Degrees

net_ns

Enable network namespace support (CONFIG_NET_NS)

pcre-jit

Use JIT support for PCRE

prometheus-exporter

Also build the prometheus exporter

slz

Use dev-libs/libslz compression library

tools

Install additional tools (halog, iprange)

wurfl

Device Detection using WURFL

net-proxy/privoxy

brotli

Decompress brotli compressed data using app-arch/brotli before filtering

client-tags

Enable support for client-specific tags

compression

Allow privoxy to compress buffered content before sending to the client, if it supports it

editor

Enable the web-based actions file editor

extended-host-patterns

Enable and require PCRE syntax in host patterns. You must convert action files to PCRE, see privoxy-url-pattern-translator.pl (see tools USE flag). Use at your own risk!

extended-statistics

Gather extended statistics

external-filters

Allow to filter content with scripts and programs. Experimental

fast-redirects

Support fast redirects

force

Allow single-page disable (force load)

fuzz

Exposes Privoxy internals to input from files or stdout. Intended for fuzzing testing

graceful-termination

Allow to shutdown Privoxy through the webinterface

image-blocking

Allows the +handle-as-image action, to send "blocked" images instead of HTML

jit

Enable PCRE jit (recommended)

lfs

Support large files (>2GB) on 32-bit systems

mbedtls

Use net-libs/mbedtls for HTTPS filtering

openssl

Use dev-libs/openssl for HTTPS filtering

png-images

Use PNG format instead of GIF for built-in images

sanitize

Enable asan, msan and usan sanitizers. Your compiler must support them

ssl

HTTPS inspection support. Enables privoxy to perform SSL MITM filtering, see docs, use with care

stats

Keep statistics

threads

Enable POSIX threads. Highly recommended, otherwise both build and run-time features may not work properly.

toggle

Support temporary disable toggle via web interface

tools

Install log parser, regression tester and user agent generator tools

whitelists

Support trust files (white lists)

zlib

Decompress zlib compressed data using sys-libs/zlib before filtering

net-proxy/rejik

banlists

Install upstream provided simple banlists

net-proxy/squid

ecap

Adds support for loadable content adaptation modules (http://www.e-cap.org)

esi

Enable ESI for accelerators, will cause squid reverse proxies to be capable of the Edge Acceleration Specification (www.esi.org)

htcp

Enable HTCP protocol

logrotate

Use app-admin/logrotate for rotating logs

qos

Adds support for Quality of Service using netfilter conntrack - see qos_flow directive for more info

ssl-crtd

Adds support for dynamic SSL certificate generation in SslBump environments

tproxy

Enables real Transparent Proxy support for Linux Netfilter TPROXY

wccp

Enable Web Cache Coordination Protocol

wccpv2

Enable Web Cache Coordination V2 Protocol

net-proxy/tinyproxy

filter-proxy

Enable filtering of domains/URLS

reverse-proxy

Enable reverse proxying

transparent-proxy

Enable transparent proxying

upstream-proxy

Enable upstream proxying

xtinyproxy-header

Include the X-Tinyproxy header

net-proxy/trojan

mysql

build with MySQL support

nat

Build with NAT support

reuseport

Build with SO_REUSEPORT support

tcpfastopen

Force build with TCP Fast Open support

net-proxy/tsocks

dns

Force DNS queries to use SOCKS server via tcp

envconf

Allow TSOCKS_CONF_FILE to specify configuration file

server-lookups

Allow hostname resolution _for_ SOCKS servers

tordns

Apply tordns patch which allows transparent TORification of the DNS queries

net-voip/mumble

g15

Enable support for the Logitech G15 LCD (and compatible devices).

pipewire

Enable pipewire support for audio output.

rnnoise

Enable alternative noise suppression option based on RNNoise.

net-voip/murmur

ice

Use dev-libs/Ice to enable remote control capabilities.

net-voip/umurmur

mbedtls

Use net-libs/mbedtls as TLS provider

shm

Enable shared memory support

net-voip/yate

amrnb

use AMR-NB

dahdi

Enable Dahdi driver

gsm

use GSM codec

ilbc

Enable iLBC codec

ilbc-webrtc

Enable iLBC webrtc codec

isac-fixed

Enable iSAC fixed codec

isac-float

Enable iSAC float codec

mysql

use MySQL client library

postgres

use Postgress SQL

spandsp

use spandsp library

speex

use Speex codec

tdmcard

Enable TDMV API card driver

wanpipe

Enable Wanpipe support

wpcard

Enable Wanpipe card driver

zaptel

Enable Zaptel driver

net-vpn/eduvpn-common

openvpn

enable support for OpenVPN

wireguard

enable support for WireGuard

net-vpn/frp

client

Build and install frp client (frpc)

server

Build and install frp server (frps)

net-vpn/libreswan

dnssec

Use DNSSEC resolver (requires net-dns/unbound)

ikev1

Enable the IKEv1 protocol

net-vpn/networkmanager-sstp

gtk4

Use gui-libs/gtk for GUI support.

net-vpn/networkmanager-strongswan

gtk4

Use GTK4 instead of GTK3.

net-vpn/ocserv

otp

Enable support for one-time passwords

net-vpn/openconnect

gssapi

Build GSSAPI support

libproxy

Enable proxy support

pskc

Enable PSKC file storage of HOTP/TOTP keys

stoken

Enable stoken support

net-vpn/openvpn

dco

Enable support for kernel data channel offload

down-root

Enable the down-root plugin

iproute2

Enabled iproute2 support instead of net-tools

mbedtls

Use mbed TLS as the backend crypto library

openssl

Use OpenSSL as the backend crypto library

pkcs11

Enable PKCS#11 smartcard support

plugins

Enable the OpenVPN plugin system

net-vpn/ovpn-dco

debug

Enable debug output in dmesg

net-vpn/pptpd

gre-extreme-debug

Log all GRE accepted packets when in debug mode (required if you want upstream support)

net-vpn/strongswan

constraints

Enable advanced X.509 constraint checking plugin

dhcp

Enable server support for querying virtual IP addresses for clients from a DHCP server. (IKEv2 only)

eap

Enable support for the different EAP modules that are supported

farp

Enable faking of ARP responses for virtual IP addresses assigned to clients (IKEv2 only)

gcrypt

Enable dev-libs/libgcrypt plugin which provides 3DES, AES, Blowfish, Camellia, CAST, DES, Serpent and Twofish ciphers along with MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+). Also includes a software random number generator.

non-root

Force IKEv1/IKEv2 daemons to normal user privileges. This might impose some restrictions mainly to the IKEv1 daemon. Disable only if you really require superuser privileges.

openssl

Enable dev-libs/openssl plugin which is required for Elliptic Curve Cryptography (DH groups 19-21,25,26) and ECDSA. Also provides 3DES, AES, Blowfish, Camellia, CAST, DES, IDEA and RC5 ciphers along with MD2, MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+) dev-libs/openssl has to be compiled with USE="-bindist".

pkcs11

Enable pkcs11 support

strongswan_plugins_addrblock

Enable support for the addrblock crypto plugin

strongswan_plugins_aesni

Enable support for Intel AES-NI crypto plugin

strongswan_plugins_blowfish

Enable support for the blowfish plugin

strongswan_plugins_bypass-lan

Enable support for the bypass-lan plugin

strongswan_plugins_ccm

Enable support for the ccm plugin

strongswan_plugins_chapoly

Enable ChaCha20/Poly1305 AEAD implementation and ChaCha20 XOF plugin

strongswan_plugins_ctr

Enable support for the ctr plugin

strongswan_plugins_eap-radius

Enable EAP Radius plugin

strongswan_plugins_error-notify

Enable support for the error-notify plugin

strongswan_plugins_forecast

Enable multicast and broadcast forwarding plugin

strongswan_plugins_gcm

Enable support for the gcm plugin

strongswan_plugins_ha

Enable support for the ha plugin

strongswan_plugins_ipseckey

Enable support for the ipseckey plugin

strongswan_plugins_kdf

Enable support for the kdf plugin

strongswan_plugins_led

Enable support for the led plugin

strongswan_plugins_lookip

Enable support for the lookip plugin

strongswan_plugins_newhope

Enable plugin that allows key exchange based on post-quantum computer New Hope algorithm

strongswan_plugins_ntru

Enable support for the ntru plugin

strongswan_plugins_padlock

Enable support for the padlock plugin

strongswan_plugins_rdrand

Enable support for the rdrand plugin

strongswan_plugins_save-keys

Enable plugin that saves IKE and/or ESP keys to files compatible with Wireshark (for debugging)

strongswan_plugins_systime-fix

Enable support for the systime-fix plugin

strongswan_plugins_unbound

Enable support for the unbound plugin

strongswan_plugins_unity

Enable support for the unity plugin

strongswan_plugins_vici

Enable support for the vici plugin

strongswan_plugins_whitelist

Enable support for the whitelist plugin

strongswan_plugins_xauth-noauth

Enable support for the xauth-noauth plugin

net-vpn/tinc

uml

Enable support for User Mode Linux Sockets

vde

Enable Virtual Distributed Ethernet (VDE) based networking

net-vpn/tor

scrypt

Use app-crypt/libscrypt for the scrypt algorithm

server

Enable tor's relay module so it can operate as a relay/bridge/authority

tor-hardening

Compile tor with hardening on vanilla compilers/linkers

net-vpn/vpnc

resolvconf

Enable support for DNS managing framework net-dns/openresolv

net-vpn/wireguard-modules

debug

Enable verbose debug reporting in dmesg of various WireGuard peer and device information.

module

Compile the actual WireGuard kernel module. Most certainly you want this enabled, unless you're doing something strange.

module-src

Install the module source code to /usr/src, in case you like building kernel modules yourself.

net-vpn/wireguard-tools

wg-quick

Install the wg-quick(8) helper tool. Most users want to use this.

net-wireless/aic8800

firmware

Install device firmware

net-wireless/aircrack-ng

airdrop-ng

Build airdrop-ng

airgraph-ng

Build airgraph-ng

experimental

Build the "experimental" tools which may randomly fail to run properly

netlink

Use netlink for channel control instead of WEXT

net-wireless/bladerf

tecla

use libtecla for command line editing, tab completion, and history

net-wireless/bladerf-fpga

x115

bitstream for the x115 kLE Cyclone IV FPGA bladerf model"

x40

bitstream for the x40 kLE Cyclone IV FPGA bladerf model"

xA4

bitstream for the xA4 49 kLE Cyclone V FPGA bladerf 2.0 micro model"

xA9

bitstream for the xA9 301 kLE Cyclone V FPGA bladerf 2.0 micro model"

net-wireless/blueman

network

Add functionality to setup (host) PAN connections using either net-dns/dnsmasq or net-misc/dhcp

net-wireless/bluez

btpclient

Enable BTP client

deprecated

Build deprecated plugins

experimental

Build experimental plugins

extra-tools

Install tools that upstream doesn't install on purpose by default. All this tools shouldn't be used. Then, please notify upstream about you still need them to let them know the situation.

mesh

Add support for Bluetooth Mesh control application and advertising bearer.

midi

Enable MIDI support

obex

Enable OBEX transfer support

test-programs

Install tools for testing of various Bluetooth functions

net-wireless/dump1090

bladerf

Build with Nuand BladeRF support

hackrf

Build with Great Scott Gadgets HackRF support

minimal

Exclude all HTML/webserver extras for a tiny build, e.g. to export data only

rtlsdr

Build with Realtek RTL2832U (rtlsdr) support

net-wireless/gnome-bluetooth

sendto

Build the bluetooth-sendto application to send files to various locations/devices

net-wireless/gnuradio

analog

enable analog signal processing blocks

audio

enable blocks to connect to audio sources (mic-in) and sinks (speaker-out) ports on a computer

channels

enable channel mode blocks

ctrlport

enable control port interface

digital

enable digital signal processing blocks

dtv

enable digital tv signal processing blocks

fec

enable block for convolutional encoding using the CCSDS standard polynomial ("Voyager")

filter

enable filter signal processing blocks

grc

enable GNU Radio Companion graphical tool to design signal processing flow graphs

iio

enable enable support for IIO devices

modtool

enable modtool for editing GNU Radio modules and components

network

enable block for networking support

performance-counters

enable block performance counters

soapy

enable support for SoapySDR blocks

trellis

enable trellis blocks for FSM

uhd

install UHD source and sink blocks

utils

install scripts to enable viewing and analysis of files produced by flow graphs

vocoder

enable blocks for audio voice encoders

wavelet

enable wavelet signal processing blocks

zeromq

enable zeromq message passing blocks

net-wireless/gqrx

gr-audio

Use audio support from net-wireless/gnuradio

net-wireless/gr-osmosdr

airspy

Build with Airspy support through net-wireless/airspy

bladerf

Build with Nuand BladeRF support through net-wireless/bladerf

hackrf

Build with Great Scott Gadgets HackRF support through net-libs/libhackrf

iqbalance

Enable support for I/Q balancing using gr-iqbal through net-wireless/gr-iqbal

rtlsdr

Build with Realtek RTL2832U support through net-wireless/rtl-sdr

sdrplay

Enable support for SDRplay devices through net-wireless/sdrplay

soapy

Build with SoapySDR support through net-wireless/soapysdr

uhd

Build with Ettus Research USRP Hardware Driver support through net-wireless/uhd

xtrx

Build with xtrx Hardware Driver support through net-wireless/libxtrx

net-wireless/horst

pcap

Add support for network packet capture via net-libs/libpcap

net-wireless/hostapd

internal-tls

Use internal TLSv1 implementation instead of depending on OpenSSL or GnuTLS

netlink

Adding support for using netlink to create VLANs

suiteb

Adding support for NSA Suite B Cryptography

wps

Add support for Wi-Fi Protected Setup

net-wireless/iwd

client

Enable iwctl client tool

monitor

Enable iwmon monitor tool

ofono

Enable support for oFono SIM authentication

standalone

Enable standalone mode with built-in DHCP client and DNS handling"

systemd

Use systemd-resolve rather than resolvconf for DNS handling in standalone mode

wired

Enable ethernet authentication daemon

net-wireless/kismet

libusb

Support libusb based capture sources such as mousejack, cc2540(ble), and nrf51822(ble)

mqtt

Enable MQTT support

pcre

Build with pcre support

rtlsdr

Enable rtlsdr based kismet capture sources

suid

Install a setuid root helper binary with limited functionality; this allows running kismet as a normal user, significantly reducing security risks

ubertooth

Enable capture source for ubertooth to sniff bluetooth low energy

wext

Enable building kismet with support for the deprecated Linux Wireless Extensions. This is required for some out of tree and staging drivers, and kismet has not been well tested with it disabled, so it defaults to on.

net-wireless/libxtrxll

usb3380

support xtrx usb model

net-wireless/neard

tools

Build and install 'nfctool' for further NFC debugging

net-wireless/rtl_433

rtlsdr

Build with Realtek RTL2832U (rtlsdr) support

soapysdr

Build with SoapySDR support

net-wireless/rtl-sdr

zerocopy

may cause a bus error on some ARM systems

net-wireless/soapysdr

bladerf

Add support for bladerf hardware

hackrf

Add support for hackrf hardware

plutosdr

Add support for Analog Devices ADALM-PLUTO hardware

rtlsdr

Add support for rtlsdr hardware

uhd

Add support for Ettus USRP hardware

net-wireless/ubertooth

bluez

use bluez to support clock following and scanning

ubertooth1-firmware

Build/install ubertooth1-firmware

net-wireless/uhd

b100

support B100 hardware

b200

support B200, B210, B200mini, B205mini hardware

e300

support E300, E310 hardware

mpmd

support N300, N310 hardware

octoclock

Octoclock Network Support

usrp1

support USRP1 hardware

usrp2

support USRP2, N200, N210 hardware

utils

utilities needed to list, query, calibrate, or update FPGA/Firmware

x300

support X300, X310 hardware

net-wireless/unifi

system-mongodb

Using dev-db/mongodb systemd service instead of the bundled one

net-wireless/urh

airspy

use native backend which directly uses net-wireless/airspy

audio

use a soundcard instead of an sdr

bladerf

use native backend which directly uses net-wireless/bladerf

hackrf

use native backend which directly uses net-libs/libhackrf

limesdr

use native backend which directly uses net-wireless/limesuite

plutosdr

use native backend which directly uses net-libs/libiio

rtlsdr

use native backend which directly uses net-wireless/rtl-sdr

sdrplay

use native backend which directly uses net-wireless/sdrplay

uhd

use native backend which directly uses net-wireless/uhd

net-wireless/wepattack

john

Build with app-crypt/johntheripper support

net-wireless/wireless-tools

multicall

Build the most commonly used tools as one binary

net-wireless/wpa_supplicant

ap

Add support for access point mode

broadcom-sta

Flag to help users disable features not supported by broadcom-sta driver

eapol-test

Build and install eapol_test binary

eap-sim

Add support for EAP-SIM authentication algorithm

fasteap

Add support for FAST-EAP authentication algorithm

fils

Add support for Fast Initial Link Setup (802.11ai)

hs2-0

Add support for 802.11u and Passpoint for HotSpot 2.0

macsec

Add support for wired macsec

mbo

Add support Multiband Operation

mesh

Add support for mesh mode

p2p

Add support for Wi-Fi Direct mode

privsep

Enable wpa_priv privledge separation binary

ps3

Add support for ps3 hypervisor driven gelic wifi

smartcard

Add support for smartcards

tdls

Add support for Tunneled Direct Link Setup (802.11z)

tkip

Add support for WPA TKIP (deprecated due to security flaws in 2009)

uncommon-eap-types

Add support for GPSK, SAKE, GPSK_SHA256, IKEV2 and EKE

wep

Add support for Wired Equivalent Privacy (deprecated due to security flaws in 2004)

wimax

Add support for Wimax EAP-PEER authentication algorithm

wps

Add support for Wi-Fi Protected Setup

sci-astronomy/cpl

gasgano

Enable support for sci-astronomy/gasgano file organizer

sci-astronomy/kstars

opencv

Enable contrast type focus measures via media-libs/opencv

password

Store passwords securely via dev-libs/qtkeychain

wcs

Enable support for World Coordinate System library using wcslib

sci-astronomy/psfex

plplot

Build with sci-libs/plplot to allow diagnostic plots during processing

sci-astronomy/scamp

plplot

Build with sci-libs/plplot to allow diagnostic plots during processing

sci-astronomy/sextractor

modelfit

Enable profile model fitting, needs sci-libs/atlas and sci-libs/fftw

sci-astronomy/siril

libconfig

Require dev-libs/libconfig to read old configuration files

wcs

Add supprt astrometry features using sci-astronomy/wcslib

sci-astronomy/stellarium

deep-sky

Install extra deep sky objects catalog (may affect performance)

lens-distortion

Enable lens distortion estimator plugin

libcxx

Use external libraries for STL features not available in libc++

media

Enable sound and video support

scripting

Enable JS scripting via dev-qt/qtscript in Qt5 or using Qml via dev-qt/qtdeclarative in Qt6

show-my-sky

Enable a better atmosphere model via sci-astronomy/calcmysky

stars

Install extra star catalogs

telescope

Enable telescope control via sci-libs/indilib

webengine

Show online results about the selected star in an embedded window using dev-qt/qtwebengine

xlsx

Support XLSX (Excel) files via dev-libs/qxlsx

sci-astronomy/swarp

cfitsio

Link with sci-libs/cfitsio

sci-astronomy/wcslib

fits

Enable support for the FITS format through sci-libs/cfitsio

pgplot

Builds PGBSOX routines, needs sci-libs/pgplot library

tools

Builds and installs extra command line utilities for WCS checking

sci-biology/abyss

misc-haskell

build abyss-samtobreak tool, pull in haskell toolchain

sci-biology/bioperl

db

Install sci-biology/bioperl-run

network

Install sci-biology/bioperl-run

run

Install sci-biology/bioperl-run

sci-biology/clustalw-mpi

mpi-njtree

Use MPI (as opposed to serial) code for computing neighbor-joining trees

static-pairalign

Use static (as opposed to dynamic) scheduling for pair alignments

sci-biology/exonerate

utils

Install the follow binaries: esd2esi, fasta2esd, fastaannotatecdna, fastachecksum, fastaclean, fastaclip, fastacomposition, fastadiff, fastaexplode, fastafetch, fastahardmask, fastaindex, fastalength, fastanrdb, fastaoverlap, fastareformat, fastaremove, fastarevcomp, fastasoftmask, fastasort, fastasplit, fastasubseq, fastatranslate, fastavalidcds

sci-biology/fasttree

double-precision

use double precision instead of single-precision floating point (2x memroy required)

sci-biology/mcl

blast

Add support for NCBI BLAST data

sci-biology/mothur

boost

Depend on dev-libs/boost for make.contigs to read .gz compressed files.

gsl

Use sci-libs/gsl to support diversity estimates for estimiator.single.

hdf5

Support Biom format 2.0 for the biom.info command via sci-libs/hdf5.

sci-biology/newick-utils

xml

Uses dev-libs/libxml2 to handle ornaments

sci-biology/ucsc-genome-browser

server

Install genome browser Web application. If this flag is off, only libraries and utilities from the suite are installed.

sci-biology/yass

dmalloc

Enable debugging with the dmalloc library

lowmem

Build for environments with low amounts of memory

sci-calculators/datamash

linux-crypto

Use Linux kernel cryptographic API

openssl

Use dev-libs/openssl for hash routines instead of internal gnulib

sci-calculators/units

units-cur

Install the units_cur python script that updates currencies

sci-chemistry/avogadro2

rpc

Enable RPC server

vtk

include vtk support

sci-chemistry/chemtool

emf

EMF export support

sci-chemistry/gnome-chemistry-utils

gnumeric

Add a Gnumeric plugin to provide a molarmass function for the spreadsheet

sci-chemistry/gromacs

build-manual

Build manual instead of downloading it

clang

Build gromacs with Clang instead of default compiler

clang-cuda

Use clang for cuda units compilation

cuda

Enable cuda non-bonded kernels

double-precision

More precise calculations at the expense of speed

gmxapi

Add support for gmxapi library

gmxapi-legacy

Enable installing lagacy headers

hwloc

Enable HWLoc lib support

mkl

Use sci-libs/mkl for fft, blas, lapack routines

nnpot

Allow to use sci-libs/caffe2 for NN Potentials

offensive

Enable gromacs partly offensive quotes

opencl

Enable opencl non-bonded kernels

single-precision

Single precision version of gromacs (default)

tng

Enable new trajectory format - tng

sci-chemistry/molequeue

client

Build the client application

server

Build the serve application

zeromq

Build with net-libs/zeromq support

sci-chemistry/openbabel

inchi

Build support for IUPAC International Chemical Identifier format

json

Build support for JSON formats (ChemDoodle, PubChem, etc...)

sci-chemistry/pymol

web

Install Pymodule needed for web app support

sci-chemistry/raster3d

gd

libgd support for PNG and JPEG output

sci-chemistry/vmd

gromacs

Add support for TNG file format

msms

Add support for MSMS SES calcualtion tool

povray

Add support for povray raytracer for HQ images

tachyon

Add support for tachyon raytracer for HQ images

sci-chemistry/votca

gromacs

Add support for gromacs file formats through sci-chemistry/gromacs

sci-electronics/gerbv

unit-mm

Set default unit for coordinates in status bar to mm

sci-electronics/ghdl

llvm

Build LLVM code generator

sci-electronics/gtkwave

fasttree

Enables experimental Fast SST Tree widget code.

fatlines

Renders lines as double width in gtkwave.

judy

Enables Judy array support.

packed

Enables '#pragma pack' for data arrays (saves memory, costs time).

sci-electronics/kicad-meta

minimal

Do not install extra data like 3D packages and templates.

sci-electronics/ktechlab

gpsim

Enable support for Microchip PIC microcontrollers similation using dev-embedded/gpsim

sci-electronics/librepcb

opencascade

Build with sci-libs/opencascadethe 3D features (e.g. reading/writing STEP files)

sci-electronics/ngspice

deprecated

Build old and deprecated apps

klu

Add support for KLU (embedded version of suitesparse)

shared

Build ngspice as a shared library

sci-electronics/nvc

llvm

Build LLVM code generator

sci-electronics/pcb

gcode

gcode file export

gif

GIF graphics export

gsvit

GSvit file export

jpeg

JPEG graphics export

m4lib-png

Enable creating png previews for the m4 library

nelma

NELMA file export

png

PNG graphics export

tk

Build tcl/tk graphical QFP footprint generator

toporouter

Build toporouter

sci-electronics/pulseview

decode

Enable decoding of protocols while capturing

sci-electronics/sigrok-cli

decode

Enable decoding of protocols while capturing

sci-electronics/splat

hires

Builds additional high resolution application 'rfsplat-hd'

sci-geosciences/gmt

gdal

Enable sci-libs/gdal library support

geos

Enable sci-libs/geos library support

gmttria

Non GNU triangulation method, more efficient

sci-geosciences/gpsd

dbus

export gpsd data over dbus connections

latency-timing

support latency timing information

ntp

Enable net-misc/ntp shared memory interface and PPS kernel support for GPS time

shm

export gpsd over shared memory

sockets

export gpsd over unix sockets

sci-geosciences/grass

geos

Use sci-libs/geos for v.buffer and adds extended options to the v.select module

las

Include support for LAS and LAZ encoded LiDAR files through sci-geosciences/liblas

pdal

Enable support for PDAL for point clouds via sci-libs/pdal

svm

Enable support for the Support Vector Machine library sci-libs/libsvm

sci-geosciences/gshhs

data

Add earth data with sci-geosciences/gshhs-data

sci-geosciences/liblas

gdal

Add support for the sci-libs/gdal geospatial raster library

sci-geosciences/mapserver

apache

Enable mapserver to run under apache

geos

Enable sci-libs/geos library support

postgis

Enable dev-db/postgis support

sci-geosciences/merkaartor

libproxy

Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration

webengine

Enable dev-qt/qtwebengine in some plugins

zbar

Enable barcode support in MWalkingPapersBackground/GeoImage via media-gfx/zbar

sci-geosciences/owntracks-recorder

crypt

Enable support for payload encryption with dev-libs/libsodium

http

Enable support for the built-in HTTP REST API

kill

Enable support removing data via the API (dangerous)

lua

Enable support for Lua hook integration

mqtt

Enable MQTT support

ping

Enable support for the "pingping" monitoring feature

tours

Enable recorder support for shared views

sci-geosciences/qgis

3d

Build QGIS 3D library using dev-qt/qt3d

georeferencer

Determines whether georeferencer plugin should be built

grass

Add support for grass

hdf5

Enable MDAL support for sci-libs/hdf5

mapserver

Determines whether mapserver should be built

netcdf

Enable MDAL support for GRIB and XMDF formats

pdal

Enable support for PDAL for point clouds via sci-libs/pdal

qml

Enable support Qml-based plugins using dev-qt/qtdeclarative

webengine

Enable webengine support using dev-qt/qtwebengine

sci-geosciences/viking

geoclue

Use app-misc/geoclue to determine current location

libexif

Use media-libs/libexif for EXIF support

oauth

Enable OAuth authentication for OSM

sci-libs/adolc

boost

Use the boost allocator from dev-libs/boost

sparse

Add support for sparse matrix algebra with sci-libs/colpack

sci-libs/armadillo

arpack

Link with sci-libs/arpack libraries for eigen decomposition

mkl

Use matrix allocation from the Intel MKL sci-libs/mkl

superlu

Use SuperLU for sparse linear equation solving sci-libs/superlu

sci-libs/arprec

qd

Use sci-libs/qd for quad-double datatype

sci-libs/atlas

generic

Build atlas assuming a fairly generic architecture (sse2 for x86, core2 for amd64)

sci-libs/avogadrolibs

archive

Enable archive support using app-arch/libarchive

vtk

Enable sci-libs/vtk support

sci-libs/blis

64bit-index

Enable 64bit array indexing, incompatible with runtime switching

eselect-ldso

Enable runtime library switching by eselect and ld.so.

openmp

Use openmp threadding model

pthread

Use pthread threadding model

serial

Use no threadding model

sci-libs/caffe2

distributed

Support distributed applications

fbgemm

Use FBGEMM

flash

Enable flash attention

gloo

Use sci-libs/gloo

mkl

Use sci-libs/mkl for blas, lapack and sparse blas routines

nnpack

Use NNPACK

numpy

Add support for math operations through numpy

onednn

Use oneDNN

openblas

Use sci-libs/openblas for blas routines

openmp

Use OpenMP for parallel code

qnnpack

Use QNNPACK

rocm

Enable ROCm gpu computing support

xnnpack

Use XNNPACK

sci-libs/cantera

hdf5

Add HDF5 container files support

python

Install Python bindings and conversion tools from Chemkin to Cantera format

sci-libs/cddlib

tools

Add a few executables and tests for cddlib

sci-libs/ceres-solver

cxsparse

Enable simple support for sparse matrix algebra from sci-libs/cxsparse with no LAPACK dependencies

gflags

Use dev-cpp/gflags for flag parsing

schur

Enable fixed-size schur specializations (disable if binary size is an issue)

sparse

Enable support for sparse matrix algebra with various packages from SuiteSparse

sci-libs/cfitsio

tools

Build optional utilities (cookbook fitscopy imcopy smem speed testprog fpack funpack)

sci-libs/cgnslib

base-scope

Enable base scoped families or connectivities

legacy

Enable or disable building legacy code (3.0 compatible)

scoping

Enable scoping of enumeration values

tools

A number of utility programs: cgnscheck, cgnscompress, cgnsdiff, cgnslist, cgnsnames, cgnsupdate, cgnsconvert, adf2hdf, hdf2adf.

sci-libs/cholmod

cholesky

Enable sparse Cholesky factorisation

matrixops

Support basic sparse and dense matrix operations (add, multiply, scale, et cetera)

modify

Enable Cholesky-modification routines like update, downdate, row-add, and row-delete

partition

Enable graph partitioning and graph-partition-based orderings through sci-libs/metis (using a bundled fork in 4.0.0+) or sci-libs/parmetis

supernodal

supernodal cholesky factorisation

sci-libs/clblas

client

Build a command line clBLAS client program.

ktest

A command line tool for testing single clBLAS kernel.

performance

Copy performance scripts that can measure and graph performance.

sci-libs/clblast

client

Enable compilation of the clients to test and compare performance with reference libraries

cuda

Build with support for cuda instead of opencl (beta!)

sci-libs/coinor-clp

glpk

Enable GNU Linear Programming Kit sci-mathematics/glpk support

metis

Enable partitioning with sci-libs/metis

mumps

Enable sci-libs/mumps support

sparse

Enable support for sparse matrix with sci-libs/cholmod

sci-libs/coinor-cppad

adolc

Add support for ADOL-C (sci-libs/adolc)

eigen

Add support for Eigen (dev-cpp/eigen)

ipopt

Add support for IPOPT (sci-libs/ipopt)

sci-libs/coinor-symphony

glpk

Enable GNU Linear Programming Kit sci-mathematics/glpk support

sci-libs/coinor-utils

glpk

Enable GNU Linear Programming Kit sci-mathematics/glpk support

sci-libs/dealii

adolc

Adds support for ADOL-C (sci-libs/adolc)

arborx

Adds support for ARBORX (sci-libs/arborx)

arpack

Adds support for ARPACK (sci-libs/arpack)

assimp

Add support for assimp (media-libs/assimp)

cgal

Adds support for CGAL (sci-mathematics/cgal)

ginkgo

Add support for ginkgo (sci-libs/ginkgo)

gmsh

Add support for gmsh (sci-libs/gmsh)

metis

Add support for metis (sci-libs/metis)

muparser

Add support for muparser (dev-cpp/muParser)

opencascade

Add support for opencascade (sci-libs/opencascade)

p4est

Add support for p4est (sci-libs/p4est)

petsc

Add support for petsc (sci-mathematics/petsc)

scalapack

Add support for ScaLAPACK (sci-libs/scalapack)

slepc

Add support for slepc (sci-mathematics/slepc)

sparse

Add support for suitesparse (sci-libs/suitesparse)

sundials

Add support for sundials (sci-libs/sundials)

symengine

Add support for symengine (sci-libs/symengine)

trilinos

Add support for trilinos (sci-libs/trilinos)

sci-libs/dlib

cblas

Build with CBLAS virtual/cblas

cuda

Enable support for CUDA for Deep Neural Networks (cuDNN) on GPU (experimental)

mkl

Enable support for Intel FFT sci-libs/mkl

python

Enable support for Python API bindings

sci-libs/dmlc-core

s3

Support for the Amazon Simple Storage Service

sci-libs/eccodes

defs

Install full set of definition files.

extra-test

Install full set of test data (large).

memfs

Enable memory based access to definition/sample files (conflicts with tests).

sci-libs/fcl

octomap

OctoMap library support

profiling

Enable profiling

sci-libs/fftw

zbus

Adds support for ZBus cycle-counter of mips

sci-libs/flann

octave

Add bindings for sci-mathematics/octave

sci-libs/fplll

qd

Use sci-libs/qd for quad-double datatype

sci-libs/gdal

armadillo

Use sci-libs/armadillo for faster TPS transform computation

fits

Enable support for NASA's sci-libs/cfitsio library

geos

Add support for geometry engine (sci-libs/geos)

gml

Enable support for dev-libs/xerces-c C++ API

ogdi

Enable support for the open geographic datastore interface (sci-libs/ogdi)

parquet

Enables read/write parquet data format (dev-libs/apache-arrow)

spatialite

Enable Spatial DBMS over sqlite dev-db/spatialite

xls

Add the dev-libs/freexl library for xls import support

sci-libs/ginkgo

cuda

Add support for cuda assimp (dev-util/nvidia-cuda-toolkit)

hwloc

Add support for hwloc (sys-apps/hwloc)

sci-libs/gloo

libuv

Enable libuv support

redis

Enable Redis backend for storage via dev-libs/hiredis

sci-libs/gmsh

alglib

Enable alglib support for mesh optimizers

cgns

Enables cgns output support

eigen

Build matrix manipulation with dev-cpp/eigen

gmm

A simple alternative to petsc based on sci-mathematics/gmm

med

Enables med support

metis

Enables metis support

mumps

Enables mumps solver support

netgen

Enable 3D Frontal triangulation using netgen lib

opencascade

Enable OpenCASCADE support

petsc

Enable sci-mathematics/petsc support

shared

Install shared library and headers

slepc

Enable sci-mathematics/slepc support

voro

Enable support to sci-libs/voro++ meshing

sci-libs/gsl

cblas-external

Link gsl with external cblas provided by (virtual/cblas) instead of shipped internal version

deprecated

Enable deprecated functions

sci-libs/hdf5

hl

Enable high level API (https://support.hdfgroup.org/HDF5/doc/HL/index.html)

unsupported

Enable unsupported combinations of configuration options

sci-libs/hipCUB

benchmark

Build and install benchmark binaries.

sci-libs/hipSOLVER

sparse

Build hipSOLVER with sparse functionality (sci-libs/cholmod)

sci-libs/hypre

int64

Build the 64 bits integer library

sci-libs/indilib

rtlsdr

Enable support for devices supported by net-wireless/rtl-sdr

websocket

Enable support for WebSocket protocol

sci-libs/ipopt

asl

AMPL Solver Library support and build the 'ipopt' binary

mumps

Enable sci-libs/mumps support

sci-libs/kissfft

alloca

Use alloca(3) instead of malloc(3) for memory management

double

Build library for primary data type of double

int16

Build library for primary data type of int16_t

int32

Build library for primary data type of int32_t

tools

Build command line tools

sci-libs/lapack

deprecated

Also build deprecated functions

eselect-ldso

Enable runtime library switching by eselect and ld.so.

lapacke

Build LAPACKE

sci-libs/lemon

coin

Enable the sci-libs/coinor-clp and sci-libs/coinor-cbc graph algorithms

glpk

Enable GNU Linear Programming Kit sci-mathematics/glpk support

sci-libs/libccd

double-precision

More precise calculations at the expense of speed

sci-libs/libgeodecomp

hpx

Enables HPX backend

opencv

Enables OpenCV related code

silo

Enables SILO related code

sci-libs/liborigin

tools

Install opj2dat command line util

sci-libs/libqalculate

hardened

Disable unsafe functions like 'command' and variables like 'uptime'.

sci-libs/libsc

romio

Build with support for the ROMIO MPI-IO component

sci-libs/libsigrok

ftdi

Enable drivers that need dev-embedded/libftdi

hidapi

Enable drivers that need dev-libs/hidapi

nettle

Enable drivers that need dev-libs/nettle

parport

Enable drivers that are parallel (IEEE1284) based

serial

Enable drivers that are serial (RS232) based

sci-libs/libsvm

tools

Install python based tool scripts for data selection and visualization with sci-visualization/gnuplot

sci-libs/linux-gpib

firmware

Install firmware

sci-libs/lis

quad

Enable quadruple precision operations

saamg

Build the Smoothed Aggregation Algebraic MultiGrid preconditioner

sci-libs/mathgl

hdf

Add support for the Hierarchical Data Format v.4 sci-libs/hdf

octave

Add bindings for sci-mathematics/octave

sci-libs/matio

sparse

Extend formats for sparse matrix (not matlab)

sci-libs/metis

double-precision

Use double- rather than single-precision floating-point representation

int64

Use 64- rather than 32-bit integer representation (needed for > 2^31 vertices)

sci-libs/mumps

metis

Enable matrix ordering with METIS (sci-libs/metis, sci-libs/parmetis)

scotch

Enable matrix ordering with sci-libs/scotch

sci-libs/netcdf

blosc

Allow using blosc compression via dev-libs/c-blosc

dap

Support for remote data access with the built-in OPeNDAP client

hdf

Build with HDF4 read capability(sci-libs/hdf, sci-libs/hdf5 and sys-libs/zlib required).

sci-libs/nlopt

octave

Add plugin for sci-mathematics/octave

sci-libs/octomap

dynamicEDT3D

Build and install dynamicEDT3D library: A library for incrementally updatable Euclidean distance transforms in 3D.

sci-libs/onnx

disableStaticReg

Disable Static Registration

sci-libs/openblas

dynamic

Build dynamic architecture detection at run time (for multi targets)

eselect-ldso

Enable BLAS/LAPACK runtime switching

index-64bit

Compile a separate INTERFACE64 OpenBLAS

pthread

Build with pthread threading model

relapack

Build the ReLAPACK extension to OpenBLAS

sci-libs/opencascade

freeimage

Enable support for image i/o via media-libs/freeimage

freetype

Enable media-libs/freetype support

inspector

Build Inspector tool

json

Enable JSON support through dev-libs/rapidjson

optimize

Don't clear allocated memory. Use optimized memory manager unlesstbb USE flag is set.

tbb

Enable multithreading with the Intel Threads Building Block dev-cpp/tbb

testprograms

Indicates whether non-regression OCCT test scripts should be installed

vtk

Enable Visualization Toolkit support via sci-libs/vtk

sci-libs/orocos_kdl

models

Build models for some well known robots.

sci-libs/p4est

vtk-binary

Enable binary vtk output. If disabled vtk files will be written in ASCII text format.

sci-libs/pastix

fortran

Install the Fortran interface

int64

Use 64- rather than 32-bit integer representation

metis

Enable matrix ordering with sci-libs/metis

scotch

Enable matrix ordering with sci-libs/scotch

starpu

Enable support for ther dev-libs/starpu runtime

sci-libs/pcl

openni

Adds support for Kinect-like 3D sensors devices with dev-libs/OpenNI.

openni2

Adds support for Kinect-like 3D sensors devices with dev-libs/OpenNI2 (should be preferred over openni).

pcap

Adds pcap file capabilities in some drivers.

qhull

Adds convex-hull operation support via media-libs/qhull.

tutorials

Builds and installs tutorials.

vtk

Adds support for VTK-Visualizations.

sci-libs/plplot

dynamic

Build with dynamic drivers

octave

Add bindings for sci-mathematics/octave

qhull

Add bindings for media-libs/qhull

shapefile

Enable support for ESRI shapefiles

sci-libs/rocBLAS

benchmark

Build and install rocblas-bench.

test

Perform rocblas-test to compare the result between rocBLAS and system BLAS.

sci-libs/rocFFT

benchmark

Build and install rocfft benchmark tools.

perfscripts

Install rocfft-perf performance visualization suite.

sci-libs/rocPRIM

benchmark

Build and install benchmark programs.

sci-libs/rocRAND

benchmark

Build and install benchmark programs.

sci-libs/rocSOLVER

benchmark

Build and install rocsolver-bench.

test

Perform rocsolver-test to compare the result between rocSOLVER and system LAPACK.

sci-libs/rocSPARSE

benchmark

Build and install rocblas-bench.

sci-libs/rocThrust

benchmark

Build and install benchmark binary.

sci-libs/rtabmap

openni2

Adds support for Kinect-like 3D sensors devices with dev-libs/OpenNI2.

sci-libs/scotch

int64

Build the 64 bits integer library (needed for > 2^31 vertices)

tools

Provides the graph, mesh, architecture, mapping/ordering, output handling programs (see Scotch User's Guide).

sci-libs/silo

browser

Enable browser support

silex

Build silex data browser

sci-libs/spqr

partition

Use the partition module of sci-libs/cholmod for partitioning

tbb

Enable multithreading with the Intel Threads Building Block dev-cpp/tbb

sci-libs/spr

root

Add sci-physics/root graphics and i/o support

sci-libs/suitesparse

partition

Enable graph partitioning and graph-partition-based orderings through sci-libs/metis or sci-libs/parmetis

tbb

Enable multithreading with the Intel Threads Building Block dev-cpp/tbb

sci-libs/sundials

hypre

Build with sci-libs/hypre conditioners

int64

Use index size of 64 rather than 32 bits

sparse

Enable support for sci-libs/klu sparse solver

superlumt

Build with sci-libs/superlu_mt

sci-libs/superlu_mt

int64

Build the 64 bits integer library

sci-libs/symengine

arb

Add support for arb (sci-mathematics/arb)

benchmarks

Build benchmarks

boost

Add support for boost integers(dev-libs/boost)

ecm

Add support for ECM integer factorization library (sci-mathematics/gmp-ecm)

flint

Add support for (sci-mathematics/flint)

llvm

Build with LLVM

mpc

Add support for multiprecision complex arithmetic(dev-libs/mpc)

mpfr

Add support for multiprecision floating point rouding(dev-libs/mpfr)

sci-libs/trilinos

adolc

Add support for adolc (sci-libs/adolc)

all-packages

Enable all supported Trilinos packages (per default only a subset is built)

arprec

Add support for arprec (sci-libs/arprec)

clp

Add support for clp (sci-libs/coinor-clp)

eigen

Add support for eigen (dev-cpp/eigen)

glpk

Add support for glpk (sci-mathematics/glpk)

gtest

Add support for gtest (dev-cpp/gtest)

hdf5

Add support for hdf5 (sci-libs/hdf5)

hwloc

Add support for hwloc (sys-apps/hwloc)

hypre

Add support for hypre (sci-libs/hypre)

matio

Add support for matio (sci-libs/matio)

metis

Add support for metis (sci-libs/metis or sci-libs/parmetis)

mkl

Add support for mkl (sci-libs/mkl)

mumps

Add support for mumps (sci-libs/mumps)

netcdf

Add support for netcdf (sci-libs/netcdf)

petsc

Add support for petsc (sci-mathematics/petsc)

qd

Add support for qd (sci-libs/qd)

scalapack

Add support for scalapack (sci-libs/scalapack)

scotch

Add support for scotch (sci-libs/scotch)

sparse

Add support for sparse matrix solvers (sci-libs/umfpack)

superlu

Add support for superlu (sci-libs/superlu)

taucs

Add support for taucs (sci-libs/taucs)

tbb

Add support for threading building blocks library (dev-cpp/tbb)

tvmet

Add support for tvmet (dev-libs/tvmet)

yaml

Add support for yaml (dev-cpp/yaml-cpp)

sci-libs/umfpack

cholmod

Use sci-libs/cholmod for matrix ordering

sci-libs/ViSP

coin

Enables Coin3D support.

demos

Installs demo programs.

dmtx

Enables barcode data matrix support.

ogre

Enables dev-games/ogre support.

opencv

Enables media-libs/opencv support.

pcl

Enables sci-libs/pcl support.

tutorials

Installs tutorials.

zbar

Enables barcodes reading.

sci-libs/vtk

all-modules

Build all modules

boost

Add support for boost

cgns

Build support to handle CGNS data files

freetype

Build support for font rendering

gdal

Support for gdal formated data

imaging

Building Imaging modules

las

Build support for LiDAR files

logging

Build the logging module

opencascade

Enable OpenCASCADE support

openvdb

Build support to handle VDB data files

pdal

Build support to handle point cloud data files

qt6

Use Qt6 packages instead of Qt5

rendering

Building Redering modules

sdl

Enable SDL2 support for rendering modules

tbb

Use dev-cpp/tbb to handle smp support

views

Building Views modules

vtkm

Build the vtkm accelerations modules

web

Install web component

sci-libs/XNNPACK

assembly

Build with assembly micro-kernels

jit

Build with JIT micro-kernels

memopt

Build with optimized memory allocation scheme

sparse

Build with graph rewriting for sparse inference

sci-mathematics/bertini

optimization

Accept upstream's choices for -O option.

sci-mathematics/boolector

cryptominisat

Enable support for sci-mathematics/cryptominisat

minisat

Enable support for sci-mathematics/minisat

picosat

Enable support for sci-mathematics/picosat

sci-mathematics/cadabra

jupyter

Build the Cadabra Jupyter kernel

sci-mathematics/cvc4

cln

Use sci-libs/cln

proofs

Support for proof generation

statistics

Include statistics

sci-mathematics/eclib

boost

Add parallel capabilities using dev-libs/boost.

flint

Enable the use of sci-mathematics/flint for certain operations.

minimal

Build only the "mwrank" program.

sci-mathematics/eprover

ho

enable support for higher-order logic

sci-mathematics/flint

ntl

Build NTL interface

sci-mathematics/form

devref

Build and install developers reference

doxygen

Build and install API documentation

sci-mathematics/fricas

clisp

Add support for GNU CLISP (dev-lisp/clisp)

clozurecl

Add support for Clozure Common Lisp (dev-lisp/clozurecl)

cmucl

Add support for CMU Common Lisp (dev-lisp/cmucl)

ecl

Add support for Embeddable Common Lisp (dev-lisp/ecl)

gcl

Add support for GNU Common Lisp (dev-lisp/gcl)

sbcl

Add support for Steel Bank Common Lisp (dev-lisp/sbcl)

sci-mathematics/gap

memcheck

Enable memory checking

minimal

Install only the GAP packages that are strictly required for GAP to run. GAP will complain about the others unless you either start it with the "-A" flag or set "AutoloadPackages" in your gap.ini.

sci-mathematics/geomview

motionaveraging

Enable experimental motion averaging technique

sci-mathematics/giac

ecm

Enable the use of sci-mathematics/gmp-ecm

gc

Enable garbage collection support via dev-libs/boehm-gc

glpk

Enable the use of sci-mathematics/glpk

sci-mathematics/gmp-ecm

custom-tune

Improve performance of some operations by selecting machine-specific defaults

sci-mathematics/gretl

extras

Build and install add-ons bundled with gretl

R

Enable support for dev-lang/R

sci-mathematics/lcalc

double

Use double precision (the upstream default)

double-double

Use sci-libs/qdfor double-double precision

pari

Use sci-mathematics/pari for elliptic curve L-functions

quad-double

Use sci-libs/qdfor quad-double precision

sci-mathematics/mathematica

bundle

Install from Wolfram's bundle file or from Mathematica only

ffmpeg

Enable media-video/ffmpeg backend support

R

Enable dev-lang/R backend support

sci-mathematics/maxima

clisp

Compile maxima with GNU CLISP (dev-lisp/clisp)

clozurecl

Compile maxima with 32-bit Clozure Common Lisp (dev-lisp/clozurecl)

clozurecl64

Compile maxima with 64-bit Clozure Common Lisp (dev-lisp/clozurecl)

cmucl

Compile maxima with CMU Common Lisp (dev-lisp/cmucl)

ecl

Compile maxima with Embeddable Common Lisp (dev-lisp/ecl)

gcl

Compile maxima with GNU Common Lisp (dev-lisp/gcl)

sbcl

Compile maxima with Steel Bank Common Lisp (dev-lisp/sbcl)

vtk

Support plotting with sci-libs/vtk

sci-mathematics/msieve

ecm

Enable support for the GMP-ECM library

sci-mathematics/normaliz

extras

Install Macaulay2 and sci-mathematics/singularpackages as shipped by upstream

nauty

Use sci-mathematics/nauty to compute automorphism groups.

sci-mathematics/octave

fltk

Use x11-libs/fltk as the backend for the OpenGL renderer in the absence of the Qt GUI

glpk

Add support for sci-mathematics/glpk for linear programming

gnuplot

Use sci-visualization/gnuplot to render plots if OpenGL is unavailable

imagemagick

Use media-gfx/graphicsmagick to read and write images

json

Allow using jsonencode and jsondecode commands via dev-libs/rapidjson

klu

Add support for KLU (sci-libs/klu)

qhull

Add support for media-libs/qhull, to allow `delaunay', `convhull', and related functions

qrupdate

Add support for sci-libs/qrupdatefor QR and Cholesky update functions

sparse

Add enhanced support for sparse matrix algebra with SuiteSparse

spqr

Add support for SPQR (sci-libs/spqr)

sundials

Enable the ode15i and ode15s ODE solvers using sci-libs/sundials

sci-mathematics/pari

data

Add additional data (elldata, galdata, seadata, nftables)

sci-mathematics/petsc

afterimage

Use Afterstep image library (media-libs/libafterimage)

boost

Use boost (dev-libs/boost)

complex-scalars

Make scalars complex

hypre

Use HYPRE (sci-mathematics/hypre) and for preconditioning

int64

Use 64 bit indexes

metis

Add support for metis (sci-libs/parmetis)

mumps

Add support for mumps (sci-libs/mumps)

scotch

Add support for scotch (sci-libs/scotch)

sparse

Use suitesparse (sci-libs/suitesparse) including cholmod (sci-libs/cholmod) for sparse factorization

superlu

Use superlu (sci-libs/superlu) for preconditioning

sci-mathematics/polymake

bliss

Enable sci-libs/bliss interface for graph and face lattice isomorphism computations.

cdd

Enable sci-libs/cddlib interface for convex hull computations (Should be kept enabled).

flint

Build with "strongly recommended" support for sci-mathematics/flint.

libpolymake

Build the polymake library to build applications using the C++ interface.

lrs

Enable sci-libs/lrslib interface for convex hull computations.

nauty

Build the extension for graph automorphism computations using sci-mathematics/nauty.

normaliz

Build the bundled extension for lattice computations using sci-mathematics/normaliz.

ppl

Enable dev-libs/ppl interface for convex hull computations.

singular

Enable the interface to sci-mathematics/singular for ideal related computations.

sci-mathematics/primecount

executable

Build the primecount CLI executable

sci-mathematics/primesieve

executable

Build the primesieve CLI executable

sci-mathematics/singular

polymake

Enable the interface to TOPCOM

sci-mathematics/slepc

arpack

Adds support for ARPACK (sci-libs/arpack)

complex-scalars

Make scalars complex

sci-mathematics/stp

cryptominisat

Enable sci-mathematics/cryptominisat support

python

Enable building the Python interface

sci-mathematics/unuran

prng

Use sci-mathematics/prng library

rngstreams

Use sci-mathematics/rngstreams library

sci-mathematics/vampire

z3

Enable support for sci-mathematics/z3

sci-mathematics/why3

coq

Add sci-mathematics/coq support

gtk

Build the IDE x11-libs/gtk+

re

Use Re (dev-ml/re) instead of Str for regular expressions

sexp

Add support for outputting S-expressions with dev-ml/ppx_sexp_conv

stackify

Enable structure reconstruction algorithm for MLCFG

zarith

Use Zarith (dev-ml/zarith) instead of Nums (dev-ml/num) for computations

zip

Enable compression of session files

sci-mathematics/why3-for-spark

coq

Add sci-mathematics/coq support

html

Build HTML documentation

hypothesis-selection

Enable hypothesis selection

sexp

Add support for outputting S-expressions with dev-ml/ppx_sexp_conv

zarith

Use Zarith (dev-ml/zarith) instead of Nums (dev-ml/num) for computations

zip

Enable compression of session files

sci-mathematics/wxmaxima

webkit

Use net-libs/webkit-gtk to show help (for maxima and wxmaxima) inside wxmaxima

sci-mathematics/yacas

jupyter

Add support for jupyter notebook

sci-mathematics/yices2

mcsat

Enable support for MCSAT

sci-mathematics/z3

isabelle

Add integration support for the Isabelle/HOL theorem prover.

sci-misc/h5utils

hdf

Build hdf to hdf5 (and vice-versa) converter

octave

Build Octave plugins

sci-misc/nco

dap

Support for remote data access with the NETCDF DAP client

ncap2

Build next generation netcdf arithmetic processor (needs dev-java/antlr)

udunits

Add sci-libs/udunits files support

sci-physics/bullet

double-precision

Build libraries in double precision

extras

Build the extras

tbb

Enable multithreading with the Intel Threads Building Block dev-cpp/tbb

sci-physics/espresso

examples

Installs the examples

sci-physics/fastjet

cgal

Use sci-mathematics/cgal instead of bundled algorithms

plugins

Build all standard and C++ plugins

sci-physics/geant

data

Add a lot of standard physics data files for geant4

freetype

Add support for media-libs/freetype

gdml

Enable geometry markup language for xml

geant3

Add compatibility for geant321 to geant4

inventor

Add support for Open Inventor SGI toolkit via Coin3D

raytracerx

Enable raytracing for physics events

tbb

Enable support for dev-cpp/tbb

trajectories

Enable display of particle trajectories

vtk

Use sci-libs/vtk for visualization (experimental)

sci-physics/geant4_vmc

g4root

Build G4Root (interface for GEANT4 simulation with a ROOT geometry)

geant3

Build with Geant4 G3toG4 library

vgm

Enable the Virtual Geometry Model (sci-physics/vgm)

sci-physics/hepmc

cm

Build with cm instead of default mm for length units

gev

Build with GeV instead of default MeV for momentum units

root

Build with ROOTIO enabled

sci-physics/lammps

extra

Additional compute, dump, fix, molecular, pair styles

hip

Enable hip gpu computing support

lammps-memalign

Enables the use of the posix_memalign() call instead of malloc() when large chunks or memory are allocated by LAMMPS. Aliengnment is on 16 byte boundaries.

sci-physics/pythia

fastjet

Build jets using the sci-physics/fastjet package

hepmc

Adds support for High Energy Physics Monte Carlo Generators sci-physics/hepmc

hepmc2

Adds support for High Energy Physics Monte Carlo Generators 2 sci-physics/hepmc

hepmc3

Adds support for High Energy Physics Monte Carlo Generators 3 sci-physics/hepmc

highfive

Support hdf and highfive

lhapdf

Support the use of external PDF sets via sci-physics/lhapdf

mpich

Support mpich

rivet

Support sci-physics/rivet

root

Use sci-physics/root trees and histograms (in examples only)

sci-physics/rivet

hepmc2

Build with HepMC2

hepmc3

Build with HepMC3

highfive

Build with hdf5 and highfive

zlib

Build with zlib

sci-physics/root

asimage

Enable support for media-libs/libafterimage

cudnn

Enable support for nVidia cuDNN library

davix

Enable support for DAVIX Data Management Client (https://cern.ch/davix)

fits

Enable support for images and data from FITS files with sci-libs/cfitsio

fortran

Compile included Fortran programs

gdml

Enable GDML writer and reader

http

Enable http server support including but not limited to fastcgi support

jupyter

Install dependencies to enable ROOT's C++ kernel in Jupyter notebooks

libcxx

Build ROOT against llvm-runtimes/libcxx

minuit

Build ROOT's internal versions of minuit (fortran) and minuit2 (C++)

pythia6

Build the interface for sci-physics/pythia version 6.x

pythia8

Build the interface for sci-physics/pythia version 8.x

R

Enable support for dev-lang/R

roofit

Build RooFit function fitting package

root7

Build experimental features to be released with ROOT 7

shadow

Enable shadow authentication in rootd and proofd

tbb

Enable implicit multi-threading (IMT) with dev-cpp/tbb

tmva

Built TMVA (ROOT's multi-variate analysis toolkit for machine learning)

unuran

Enable support for sci-mathematics/unuran

uring

Enable support for sys-libs/liburing in RNTuple

vc

Enable support for dev-libs/vc with VecCore

xrootd

Build the interface for net-libs/xrootd

sci-physics/thepeg

fastjet

Adds support for sci-physics/fastjet

hepmc

Adds support for High Energy Physics Monte Carlo Generatorssci-physics/hepmc

hepmc3

Adds support for High Energy Physics Monte Carlo Generators 3sci-physics/hepmc

lhapdf

Adds support for sci-physics/lhapdf

rivet

Adds support for sci-physics/rivet

sci-physics/vgm

geant4

Enable interaction with Geant4(sci-physics/geant:4)

root

Enable interaction with ROOT (sci-physics/root)

sci-physics/yoda

root

Adds support for sci-physics/root

sci-visualization/fityk

nlopt

Enable optimization with sci-libs/nlopt

sci-visualization/gnuplot

amos

Enable Amos routines for complex Airy and Bessel functions (dev-libs/openspecfun)

bitmap

Enable dot-matrix printers and pbm terminal

gd

Add support for media-libs/gd. Needed for GIF, JPEG, and PNG image output.

gpic

Include support for gpic terminal

libcerf

Enable special functions from sci-libs/libcerf

metafont

Include support for metafont terminal

metapost

Include support for metapost terminal

regis

Include support for ReGIS terminal

tgif

Include support for tgif terminal

sci-visualization/gr

agg

Enable the libagg anti-grain rendering engine

sci-visualization/gwyddion

fits

Enable FITS image import via sci-libs/cfitsio

jansson

Enable JSON data manipulation via dev-libs/jansson

sourceview

Enable support for x11-libs/gtksourceview

unique

Enable remote control backend via dev-libs/libunique

sci-visualization/labplot

cantor

Enable support for different open-source computer algebra systems via kde-apps/cantor

eigen

Enable support for fast baseline removal via dev-cpp/eigen

fits

Enable support for NASA's sci-libs/cfitsio library

libcerf

Enable special functions from sci-libs/libcerf

markdown

Enable Markdown support via app-text/discount

matio

Enable support for matio (sci-libs/matio)

ods

Enable support for importing/exporting OpenDocument spreadsheets (.ods) via dev-libs/liborcus

origin

Enable support for reading OriginLab OPJ project files through sci-libs/liborigin

root

Enable support for CERN's ROOT file type

serial

Enable support for RS232 serial ports using dev-qt/qtserialport

Enable support for a share menu using kde-frameworks/purpose

xlsx

Enable support for importing/exporting Microsoft Excel files (.xlsx) via dev-libs/qxlsx

sci-visualization/paraview

boost

Enable the usage of dev-libs/boost

cg

Add support for nvidia's cg shaders

nvcontrol

Add NVCONTROL support for OpenGL options

offscreen

Offscreen rendering through OSMesa

plugins

Build and install additional plugins

webengine

Add support for dev-qt/qtwebengine

sci-visualization/scidavis

origin

Add support for reading OriginLab OPJ project files through sci-libs/liborigin.

python

Build support for python scripting.

sec-policy/selinux-base

ubac

Enable User Based Access Control (UBAC) in the SELinux policy

unconfined

Enable support for the unconfined SELinux module

unknown-perms

Default allow unknown classes in kernels newer than the policy (SELinux policy capability).

sec-policy/selinux-base-policy

unconfined

Enable support for the unconfined SELinux policy module

sys-apps/accountsservice

elogind

Use sys-auth/elogind for session tracking

systemd

Use sys-apps/systemd for session tracking

sys-apps/bfs

io-uring

Use sys-libs/liburing for faster async I/O

sys-apps/busybox

make-symlinks

Create all the appropriate symlinks in /bin and /sbin.

math

Enable math support in gawk (requires libm)

mdev

Create the appropriate symlink in /sbin and install mdev.conf and support files

sep-usr

Support a separate /usr without needing an initramfs by booting with init=/ginit

static

Make the system rescue shell (/bin/bb) static so you can recover even when glibc is broken

systemd

Support systemd

sys-apps/coreutils

caps

Add Linux capabilities support in output of file utilities (ls, dir, ...) via sys-libs/libcap

hostname

Build the hostname program

kill

Build the kill program

multicall

Build all tools into a single `coreutils` program akin to busybox to save space

openssl

Use openssl libcrypto hash routines for hash functions

split-usr

Enable this if /bin and /usr/bin are separate directories

sys-apps/cpu-x

cpu

Use the dev-libs/libcpuid library for CPU info

force-libstatgrab

Use sys-libs/libstatgrab to instead of sys-process/procps

gpu

Use the media-libs/glfw library for GPU info

pci

Use the sys-apps/pciutils library for PCI info

sys-apps/dbus

elogind

Use sys-auth/elogind for session tracking.

systemd

Build with sys-apps/systemd at_console support

sys-apps/dbus-broker

launcher

dbus-daemon compatibility launcher

sys-apps/dtc

yaml

support .yaml-encoded device trees

sys-apps/duc

cairo

Build support for exporting to PNG and PDF with x11-libs/cairo

leveldb

Use dev-libs/leveldb as the backend

ncurses

Build support for the ncurses client

sqlite

Use dev-db/sqlite:3 as the backend

tokyocabinet

Use dev-db/tokyocabinet as the backend

X

Use X11 for the GUI instead of OpenGL. This is the recommended option

sys-apps/elfix

ptpax

Enable PT_PAX_FLAGS support.

xtpax

Enable XATTR_PAX_FLAGS support.

sys-apps/etckeeper

cron

Install cron script

sys-apps/ethtool

netlink

Enable netlink interface via net-libs/libmnl

sys-apps/firejail

apparmor

Enable support for custom AppArmor profiles

chroot

Enable chrooting to custom directory

contrib

Install contrib scripts

dbusproxy

Enable DBus proxying to filter access in supporting profiles

file-transfer

Enable file transfers between sandboxes and the host system

globalcfg

Enable global config file

network

Enable networking features

private-home

Enable private home feature

userns

Enable attaching a new user namespace to a sandbox (--noroot option)

X

Enable X11 sandboxing

sys-apps/flashrom

atahpt

Highpoint (HPT) ATA/RAID controller support

atapromise

Support for Promise PDC2026x (FastTrak/Ultra)

atavia

Support for VIA VT6421A SATA controllers

buspirate-spi

Enable Bus Pirate SPI programmer

ch341a-spi

Enable WCH CH341A SPI programmer

dediprog

Dediprog SF100 support

developerbox-spi

Enable Devloperbox SPI recovery support

digilent-spi

Enable support for Digilent iCEblink40 development board

dirtyjtag-spi

Support for DirtyJTAG (a USB-JTAG firmware for STM32 MCUs)

drkaiser

Enable Dr. Kaiser programmer

dummy

Enable dummy tracing

ft2232-spi

Enable ftdi programmer, flashing through FTDI/SPI USB interface

gfxnvidia

Enable NVIDIA programmer

internal

Enable internal/onboard support

internal-dmi

Enable internal DMI decoding rather than use sys-apps/dmidecode

it8212

Support for ITE IT8212F ATA/RAID controllers

jlink-spi

Support for SEGGER J-Link and compatible devices

linux-mtd

Enable support for Linux mtd SPI flash devices

linux-spi

Enable support for Linux userspace spidev interface

mediatek-i2c-spi

Support for Mediatek LCD controllers

mstarddc-spi

Support for SPI flash ROMs accessible through DDC in MSTAR-equipped displays

nic3com

Enable 3Com NIC programmer

nicintel

Support for Intel NICs

nicintel-eeprom

Support for EEPROMs on Intel Gigabit network cards

nicintel-spi

Support for SPI on Intel NICs

nicnatsemi

Support for National Semiconductor NICs

nicrealtek

Support for Realtek NICs

ogp-spi

Enable support for OGP (Open Graphics Project) SPI flashing

parade-lspcon

Enable support for Parade lspcon USB-C to HDMI protocol translator

pickit2-spi

Support for SPI flash ROMs accessible via Microchip PICkit2

pony-spi

Enable support for SI-Prog like hardware by Lancos

raiden-debug-spi

Support for Chrome EC based debug tools - SuzyQable, Servo V4, C2D2 & uServo

rayer-spi

RayeR SPIPGM hardware support

realtek-mst-i2c-spi

Enable support for Realtek RTD2142 MST

satamv

Enable programmer for Marvell SATA controllers

satasii

Enable programmer for SiI SATA controllers

serprog

Enable Serial Flasher programmer

stlinkv3-spi

Enable SPI programmer using STLINK-V3

tools

Install ich_descriptor_tool, a tool for reading descriptor-mode SPI-flash images for Intel chipsets

usbblaster-spi

Enable support for Altera USB-Blaster dongles

sys-apps/fwupd

amdgpu

Build and install AMD dGPU (Navi3x and above) plugin

amt

Build and install Intel AMT plugin

archive

Use app-arch/libarchive for archives support

cbor

Enable CBOR support for coSWID and uSWID via dev-libs/libcbor

fastboot

Build and install fastboot plugin

flashrom

Enable flashrom plugin via sys-apps/flashrom

gusb

Enable dev-libs/libgusb support

logitech

Build and install Logitech bulk controller plugin

modemmanager

Build and install Modem Manager plugin

nvme

Build and install NVMe plugin

spi

Install Intel-SPI plugin

synaptics

Install synaptics plugin

test-full

Enable tests known not to play nicely with the sandbox

tpm

Install Trusted Platform Module plugin

uefi

Enable UEFI support

sys-apps/gawk

mpfr

Use dev-libs/mpfr for high precision arithmetic (-M / --bignum)

pma

Experimental Persistent Memory Allocator (PMA) support which allows persistence of variables, arrays, and user-defined functions across runs.

sys-apps/gnome-disk-utility

fat

Include FAT16/FAT32 support (sys-fs/dosfstools)

sys-apps/grep

egrep-fgrep

Install deprecated 'egrep' and 'fgrep' wrappers for 'grep -E' and 'grep -F' respectively. GNU grep 3.8 onwards warns about their usage by default, but the versions installed by this flag do not. No deprecation warnings are emitted when this flag is enabled.

sys-apps/groff

uchardet

Enable automatic encoding detection via app-i18n/uchardet

sys-apps/hwloc

cairo

Enable the Cairo back-end of hwloc's lstopo command

cpuid

Enable the cpuid-based architecture specific support (x86 component)

cuda

Enable CUDA device discovery using libcudart

gl

Enable GL display device discovery (NVCtrl)

l0

Enable oneAPI Level Zero device discovery

numa

Add support for numa memory allocation

nvml

Enable the NVML device discovery

pci

Enable PCI device discovery using libpci

plugins

Build hwloc components as plugins so that the hwloc core library does not directly depend on their dependencies (for instance the libpci library)

rocm

Enable AMD RSMI device discovery

X

use the X Window System

xml

use libxml2 for XML support, instead of a custom minimalistic support

sys-apps/ibm-powerpc-utils

rtas

Add support for the Run Time Abstraction Services (RTAS)

sys-apps/iotools

make-symlinks

Generate sub-command symlinks to iotools -- note that a lot are simple like "xor"

sys-apps/ipmicfg

uefi

Install compatible UEFI file for boot.

sys-apps/ipmitool

openbmc

Enable OpenBMC D-Bus interface

openipmi

Use the system OpenIPMI implementation.

sys-apps/iproute2

berkdb

build programs that use berkdb (just arpd)

bpf

Use dev-libs/libbpf

elf

support loading eBPF programs from ELFs (e.g. LLVM's eBPF backend)

iptables

include support for iptables filtering

minimal

only install ip and tc programs, without eBPF support

nfs

Support RPC lookups via net-libs/libtirpc in ss

sys-apps/irqbalance

numa

Support balancing IRQs across NUMA nodes

thermal

Enable support of thermal events via sys-power/thermald

tui

Enable build of irqbalance terminal user interface

sys-apps/kexec-tools

booke

Include support for Book-E memory management

lzma

Enables support for LZMA compressed kernel images

xen

Enable extended xen support

sys-apps/kmod

lzma

Enable support for XZ compressed modules

pkcs7

Enable PKCS#7 signature parsing for modinfo.

tools

Install module loading/unloading tools.

zlib

Enable support for gzipped modules

sys-apps/kmscon

drm

Enable Linux DRM for backend

fbdev

Enable Linux FBDev for backend

pango

Enable pango font rendering

pixman

Enable pixman font rendering

systemd

Enable multiseat support via systemd

sys-apps/linux-misc-apps

usbip

Include USB/IP binaries to replace net-misc/usbip

sys-apps/lm-sensors

contrib

Installs user contributed configuration files so you don't need to find settings on your own for your system if somebody else has already created such a configuration for sensors/mainboards you are using.

sensord

Enable sensord - a daemon that can be used to periodically log sensor readings from hardware health-monitoring chips

sys-apps/man-db

manpager

Enable manpager wrapper for colorizing output

sys-apps/memtest86+

bios32

Compile a BIOS-bootable 32bit memtest image

bios64

Compile a BIOS-bootable 64bit memtest image

boot

Install to /boot in addition to /usr/share/memtest86+/

iso32

Compile a 32bit ISO image

iso64

Compile a 64bit ISO image

uefi32

Compile a EFI32-bootable 32bit memtest image

uefi64

Compile a UEFI-bootable 64bit memtest image

sys-apps/moreutils

perl

Install scripts written in Perl

sys-apps/net-tools

arp

build the arp and rarp tools (for manipulating the ARP cache)

hostname

build the hostname and dnsdomainname tools

plipconfig

build the plipconfig tool (for working with old PLIP hardware)

slattach

build the slattach tool (for working with old serial ports)

sys-apps/nvme-cli

json

Support JSON output via dev-libs/json-c

pdc

Set default Persistent Discovery Controllers behavior

sys-apps/openrazer

client

Build the OpenRazer daemon client

daemon

Build the OpenRazer daemon service

sys-apps/openrc

bash

enable the use of bash in service scripts (experimental)

netifrc

enable Gentoo's network stack (net.* scripts)

newnet

enable the new network stack (experimental)

s6

install s6-linux-init

sysvinit

control the dependency on sysvinit (experimental)

sysv-utils

Install sysvinit compatibility scripts for halt, init, poweroff, reboot and shutdown

sys-apps/openrc-navi

bash

enable the use of bash in service scripts (experimental)

netifrc

enable Gentoo's network stack (net.* scripts)

newnet

enable the new network stack (experimental)

s6

install s6-linux-init

sysvinit

control the dependency on sysvinit (experimental)

sysv-utils

Install sysvinit compatibility scripts for halt, init, poweroff, reboot and shutdown

sys-apps/pciutils

dns

Enable support for querying the central database of PCI IDs using DNS

kmod

Enable sys-apps/kmod support for the -k switch in lspci command

zlib

Support compressed pci.ids database

sys-apps/pcmciautils

staticsocket

Add support for static sockets

sys-apps/pcsc-lite

embedded

limit RAM and CPU ressources by disabling features

libusb

Use dev-libs/libusb detection to hotplug new smartcard readers. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use udev.

policykit

Uses sys-auth/polkit to restrict access to smartcard readers or smartcards to given users.

udev

Use virtual/libudev rules to handle devices' permissions and hotplug support. Unless you know what you're doing do not disable this flag on Linux kernels. This is provided as an option for completeness.

sys-apps/pcsc-tools

network-cron

Install a monthly cronjob to update the update-smartcard_list script

sys-apps/plocate

io-uring

Enable efficient I/O via sys-libs/liburing.

sys-apps/policycoreutils

audit

Enable support for sys-process/audit and use the audit_* functions (like audit_getuid instead of getuid())

sys-apps/portage

apidoc

Build html API documentation with sphinx-apidoc.

gentoo-dev

Enable features required for Gentoo ebuild development.

ipc

Use inter-process communication between portage and running ebuilds.

native-extensions

Compiles native "C" extensions (speedups, instead of using python backup code). Currently includes libc-locales. This should only be temporarily disabled for some bootstrapping operations. Cross-compilation is not supported.

rsync-verify

Enable full-tree cryptographic verification of Gentoo repository rsync checkouts using app-portage/gemato.

xattr

Preserve extended attributes (filesystem-stored metadata) when installing files. Usually only required for hardened systems.

sys-apps/ppc64-diag

rtas

Add support for the Run Time Abstraction Services (RTAS)

sys-apps/proot

care

Build dynamic CARE binary (more info - https://proot-me.github.io)

sys-apps/razercfg

gui

Installs GUI configuration utility and status bar applet. Requires dev-python/pyqt5

sys-apps/rng-tools

jitterentropy

Enable Jitter RNG entropy support

nistbeacon

Enable NIST beacon entropy support

pkcs11

Enable PKCS11 entropy support

qrypt

Enable qrypt beacon entropy support

rtlsdr

Enable atmospheric-static entropy support with net-wireless/rtl-sdr

sys-apps/s390-tools

cryptsetup

build the zkey-cryptsetup utility (requires USE=openssl)

fuse

build cmsfs-fuse to read files stored on a z/VM CMS disk

ncurses

build hyptop monitoring program

openssl

build the zkey utility

pfm

build the cpacfstats tool

zlib

build the zgetdump and dump2tar utilities

sys-apps/s6

execline

enable support for dev-lang/execline

sys-apps/s6-linux-init

sysv-utils

Install sysvinit compatibility symlinks for telinit, halt, poweroff, reboot, and shutdown

sys-apps/sandbox

nnp

Enable NO_NEW_PRIVS which blocks set*id programs from gaining privileges (e.g. sudo)

sys-apps/shadow

su

build the su program

sys-apps/smartmontools

caps

Build against sys-libs/libcap-ng to allow smartd to drop its privileges.

daemon

Install the monitoring daemon (smartd) and associated scripts.

update-drivedb

Install a script to update the drivedb file.

sys-apps/smc-sum

module

Install Supermicro's kernel module.

sys-apps/superdiag

iso

Install an iso image, which can be used with sys-apps/smc-sum.

usb

Install all files, which are needed for an installation on an usb thumb drive.

sys-apps/systemd

audit

Enable support for sys-process/audit

boot

Enable EFI boot manager and stub loader

bpf

Enable BPF support for sandboxing and firewalling.

cgroup-hybrid

Default to hybrid (legacy) cgroup hierarchy instead of unified (modern).

cryptsetup

Enable cryptsetup tools (includes unit generator for crypttab)

curl

Enable support for uploading journals

dns-over-tls

Enable DNS-over-TLS support

elfutils

Enable coredump stacktraces in the journal

fido2

Enable FIDO2 support

gcrypt

Enable use of dev-libs/libgcrypt for various features

homed

Enable portable home directories

http

Enable embedded HTTP server in journald

importd

Enable import daemon

iptables

Use libiptc from net-firewall/iptables for NAT support in systemd-networkd; this is used only if the running kernel does not support nftables

kernel-install

Enable kernel-install

kmod

Enable kernel module loading via sys-apps/kmod

lz4

Enable lz4 compression for the journal

openssl

Enable use of dev-libs/openssl for various features

pkcs11

Enable PKCS#11 support for cryptsetup and homed

pwquality

Enable password quality checking in homed

qrcode

Enable qrcode output support in journal

resolvconf

Install resolvconf symlink for systemd-resolve

sysv-utils

Install sysvinit compatibility symlinks and manpages for init, telinit, halt, poweroff, reboot, runlevel, and shutdown

tpm

Enable TPM support

ukify

Enable systemd-ukify

vanilla

Disable Gentoo-specific behavior and compatibility quirks

xkb

Depend on x11-libs/libxkbcommon to allow logind to control the X11 keymap

sys-apps/systemd-utils

boot

Enable systemd-boot (UEFI boot manager)

kernel-install

Enable kernel-install

kmod

Enable kernel module loading via sys-apps/kmod

sysusers

Enable systemd-sysusers

tmpfiles

Enable systemd-tmpfiles

udev

Enable systemd-udev (userspace device manager)

ukify

Enable systemd-ukify

sys-apps/tcp-wrappers

netgroups

Support matching NIS (host) netgroup names via the @netgroup syntax (if you don't know what this means, you most likely do not need it)

sys-apps/texinfo

standalone

Build standalone version that survives all Portage bugs

sys-apps/usbguard

umockdev

Enables support for dev-util/umockdev

sys-apps/usermode-utilities

fuse

Build tools (currently umlmount) needing fuse

sys-apps/util-linux

audit

Use sys-process/audit to emit audit messages about system changes

caps

build setpriv helper (run programs with diff capabilities)

cramfs

build mkfs/fsck helpers for cramfs filesystems

cryptsetup

Use sys-fs/cryptsetup to have built-in dm-verity in libmount

fdformat

build fdformat (floppy disk format)

hardlink

build hardlink program

kill

build the kill program

logger

build the logger program

pam

build runuser helper

rtas

Add support for the Run Time Abstraction Services (RTAS)

su

build the su program

suid

Install some programs with suid bit set to provide additional functionality. mount/umount: non-root users may mount/umount devices wall/write: non-root users can notify other users su: non-root users may become root

tty-helpers

install the mesg/wall/write tools for talking to local users

uuidd

build uuidd daemon

sys-apps/watchdog

nfs

enable support for checking nfs mounts

sys-apps/xdg-desktop-portal

flatpak

Enable sys-apps/flatpak integration

seccomp

Use sys-apps/bubblewrap (which requires seccomp) to sandbox some functionality like icon handling

sys-apps/xinetd

rpc

support RPC services

sys-auth/elogind

cgroup-hybrid

Use hybrid cgroup hierarchy instead of unified (OpenRC's default).

sys-auth/munge

gcrypt

Use libgcrypt instead of openssl

sys-auth/nss-pam-ldapd

pynslcd

Install the python implementation along with the standard implementation

utils

Install the command-line utilities

sys-auth/oath-toolkit

pam

Build PAM module for pluggable login authentication for OATH

sys-auth/pambase

debug

Enable debug information logging on syslog(3) for all the modules supporting this in the system authentication and system login stacks.

elogind

Use pam_elogind module to register user sessions with elogind.

homed

Use pam_systemd_home module to manage home directories with the systemd-homed service

minimal

Disables the standard PAM modules that provide extra information to users on login; this includes pam_lastlog, pam_motd, pam_mail and other similar modules. This might not be a good idea on a multi-user system but could reduce slightly the overhead on single-user non-networked systems.

mktemp

Enable pam_mktemp module on system auth stack for session handling. This module creates a private temporary directory for the user, and sets TMP and TMPDIR accordingly.

nullok

Enable the nullok option with the pam_unix module. This allows people to login with blank passwords.

pam_krb5

Enable pam_krb5 module on system auth stack, as an alternative to pam_unix. If Kerberos authentication succeeds, only pam_unix will be ignorde, and all the other modules will proceed as usual, including Gnome Keyring and other session modules. It requires sys-libs/pam as PAM implementation.

pam_ssh

Enable pam_ssh module on system auth stack for authentication and session handling. This module will accept as password the passphrase of a private SSH key (one of ~/.ssh/id_rsa, ~/.ssh/id_dsa or ~/.ssh/identity), and will spawn an ssh-agent instance to cache the open key.

passwdqc

Enable pam_passwdqc module on system auth stack for password quality validation. This module produces warnings, rejecting or providing example passwords when changing your system password. It is used by default by OpenWall GNU/*/Linux and by FreeBSD.

pwhistory

Enable pam_pwhistory module on system auth stack to save the last passwords for each user in order to force password change history and keep the user from alternating between the same password too frequently.

pwquality

Enable pam_pwquality module on system auth stack for passwd quality validation. It is used by default by Fedora GNU/*/Linux.

securetty

Enable pam_securetty module in the login stack. Not generally relevant anymore as the login stack only refers to local logins and local terminals imply secure access in the first place.

sha512

Switch Linux-PAM's pam_unix module to use sha512 for passwords hashes rather than MD5. This option requires sys-libs/pam version 1.0.1 built against sys-libs/glibc version 2.7, if it's built against an earlier version, it will silently be ignored, and MD5 hashes will be used. All the passwords changed after this USE flag is enabled will be saved to the shadow file hashed using SHA512 function. The password previously saved will be left untouched. Please note that while SHA512-hashed passwords will still be recognised if the USE flag is removed, the shadow file will not be compatible with systems using an earlier glibc version.

sssd

Add System Security Services Daemon (sys-auth/sssd) support via pam_sss.

systemd

Use pam_systemd module to register user sessions in the systemd control group hierarchy.

yescrypt

Switch Linux-PAM's pam_unix module to use yescrypt for passwords hashes rather than MD5

sys-auth/pam_mktemp

prevent-removal

If supported, set EXT2_APPEND_FL on /tmp/.private to prevent temporary directories from being removed

sys-auth/pam_mysql

openssl

Use OpenSSL for md5 and sha1 support

sys-auth/pam_u2f

debug

Enable debug messages using the pam logging macros.

sys-auth/polkit

daemon

Build polkitd in addition to libpolkit.

duktape

Use dev-lang/duktape instead of dev-lang/spidermonkey as JavaScript engine

systemd

Use sys-apps/systemd for session tracking

sys-auth/seatd

builtin

Enable embedded server in libseat

server

Enable standalone seatd server, replacement to (e)logind

sys-auth/ssh-ldap-pubkey

schema

Install a copy of the LPK schema, only needed on LDAP servers.

sys-auth/sssd

acl

Build and use the cifsidmap plugin

netlink

Add support for netlink protocol via dev-libs/libnl

nfsv4

Add support for the nfsv4 idmapd plugin provided by net-fs/nfs-utils

passkey

Add support for FIDO2 passkeys"

samba

Add Privileged Attribute Certificate Support for Kerberos

subid

Support subordinate uid and gid ranges in FreeIPA

sudo

Build helper to let app-admin/sudo use sssd provided information

systemtap

Enable SystemTap/DTrace tracing

sys-block/f3

extra

Build the additional f3probe, f3brew and f3fix utility (requires sys-block/parted and virtual/udev)

sys-block/fio

aio

Enable AIO ioengine

curl

Enable HTTP engine for S3 and WebDav support support via net-misc/curl

glusterfs

Enable GlusterFS gfapi support via sys-cluster/glusterfs

gnuplot

Install tools for generating gnuplots

io-uring

Enable efficient I/O via sys-libs/liburing.

nfs

Enable NFS support

numa

Enable numa support

pandas

Install dependencies for complex python scripts

rbd

Enable Rados block device support via sys-cluster/ceph

rdma

Enable infiniband support via sys-cluster/rdma-core

tcmalloc

Link against dev-util/google-perftools by default which will speed up USE=rbd up to 20%

zbc

Enable ZBC & ZAC disks via sys-block/libzbc.

sys-block/gparted

wayland

Enable interim workaround to allow running GParted under Wayland by granting permission to the X11 display using x11-apps/xhost

sys-block/libfabric

efa

Enable Amazon EC2 Elastic Fabric Adapter provider

rocr

Enable Radeon Open Compute provider

usnic

Enable Cisco VIC (virtualized NIC) hardware on Cisco UCS server provider

verbs

Enable Linux Infiniband verbs provider

sys-block/nbd

netlink

Add support for netlink protocol via dev-libs/libnl

sys-block/nbdkit

ext2

Enable the ext2 filter via sys-fs/e2fsprogs.

libguestfs

Enable the app-emulation/libguestfs plugin.

libssh

Enable the SSH plugin via net-libs/libssh.

libvirt

Enable the app-emulation/libvirt plugin.

nbd

Enable the nbd plugin via sys-libs/libnbd.

torrent

Enable the torrent plugin via net-libs/libtorrent-rasterbar.

zlib-ng

Use sys-libs/zlib-ng to handle zlib decompression.

sys-block/ndctl

libtracefs

Use dev-libs/libtracefs to build cxl-monitor binary

sys-block/open-iscsi

rdma

Support iSCSI over RDMA

tcp

Support iSCSI over TCP

sys-block/parted

debug

Enable debugging as encouraged by upstream: [The default configuration] includes --enable-debug (by default), which contains many assertions. Obviously, these "waste" space, but in the past, they have caught potentially dangerous bugs before they would have done damage, so we think it's worth it. Also, it means we get more bug reports ;)

device-mapper

Enable device-mapper support from sys-fs/lvm2 in parted

sys-block/partimage

nologin

Do not include login support when connecting partimaged

sys-block/perccli

uefi

Install UEFI variant as well

sys-block/sas2ircu

uefi

Install UEFI variant as well

sys-block/sas3flash

uefi

Install UEFI variant as well

sys-block/sas3ircu

uefi

Install EFI variant as well

sys-block/tgt

rbd

Add support for ceph block devices

sys-block/thin-provisioning-tools

io-uring

Enable experimental support for io-uring.

sys-boot/grub

device-mapper

Enable support for devmapper. Required for LUKS or LVM volume detection.

efiemu

Build and install the efiemu runtimes

fonts

Build and install fonts for the gfxterm module

libzfs

Enable support for sys-fs/zfs

mount

Build and install the grub-mount utility

themes

Build and install GRUB themes (starfield)

truetype

Build and install grub-mkfont conversion utility

sys-boot/lilo

device-mapper

Enable support for device-mapper from sys-fs/lvm2

minimal

Do not install the dolilo helper script

pxeserial

Avoid character echo on PXE serial console

sys-boot/plymouth

drm

Provides abstraction to the DRM drivers (intel, nouveau and vmwgfx at this moment)

freetype

Build with freetype support (if enabled, used for encryption prompts)

pango

Adds support for printing text on splash screen and text prompts, e.g. for password

split-usr

Enable this if /bin and /usr/bin are separate directories

sys-boot/refind

btrfs

Builds the EFI binary btrfs filesystem driver

ext2

Builds the EFI binary ext2 filesystem driver

ext4

Builds the EFI binary ext4 filesystem driver

hfs

Builds the EFI binary hfs filesystem driver

iso9660

Builds the EFI binary iso9660 filesystem driver

ntfs

Builds the EFI binary ntfs filesystem driver

reiserfs

Builds the EFI binary reiserfs filesystem driver

sys-boot/silo

tilo-only

Install only the tilo netboot tool

sys-boot/syslinux

bios

Enable BIOS support

uefi

Enable UEFI support

sys-boot/vboot-utils

libzip

Use dev-libs/libzip.

sys-cluster/ceph

babeltrace

Add support for LTTng babeltrace

cephfs

Build support for cephfs, a POSIX compatible filesystem built on top of ceph

diskprediction

Enable local diskprediction module to predict disk failures

dpdk

Enable DPDK messaging

fuse

Build fuse client

grafana

Install grafana dashboards

jaeger

Enable jaegertracing and it's dependent libraries

kafka

Rados Gateway's pubsub support for Kafka push endpoint

lttng

Add support for LTTng

mgr

Build the ceph-mgr daemon

parquet

Support for s3 select on parquet objects

pmdk

Enable PMDK libraries

rabbitmq

Use rabbitmq-c to build rgw amqp push endpoint

radosgw

Add radosgw support

rbd-rwl

Enable librbd persistent write back cache

rbd-ssd

Enable librbd persistent write back cache for SSDs

rdma

Enable RDMA support via sys-cluster/rdma-core

rgw-lua

Rados Gateway's support for dynamically adding lua packagess

spdk

Enable SPDK user-mode storage driver toolkit

system-boost

Use system dev-libs/boost instead of the bundled one

uring

Build with support for sys-libs/liburing

xfs

Add xfs support

zbd

Enable sys-block/libzbd bluestore backend

sys-cluster/charliecloud

ch-image

Build the internal builder ch-image (previously named ch-grow)

sys-cluster/charm

ampi

Build implementation of MPI on top of Charm++

charmdebug

Enable the charm debugger

charmproduction

Optimize performance of Charm++ runtime

charmtracing

Enable tracing support in Charm++

cmkopt

Enable CMK optimisation

mlogft

Compile with Charm++ message logging fault tolerance support

numa

Support memory affinity with NUMA

syncft

Compile with Charm++ fault tolerance support

tcp

Use TCP (instead of UPD) for socket communication

sys-cluster/cluster-glue

ipmilan

Install the ipmilan plugin (requires sys-libs/openipmi)

libnet

Force use of net-libs/libnet

sys-cluster/corosync

augeas

Enable augeas support

watchdog

Enable watchdog support

sys-cluster/drbd-utils

pacemaker

Enable Pacemaker integration

xen

Enable Xen integration

sys-cluster/galera

garbd

Install Galera Arbitrator - a stateless daemon which acts as a lightweight group member

sys-cluster/glusterfs

fuse

Add FUSE mount helper

georeplication

Enable support for georeplication (requires dev-lang/python)

ipv6

Use IPv6 by default, requires libtirpc

libtirpc

Build against net-libs/libtirpc for RPC support

rsyslog

Install configuration snippet for app-admin/rsyslog

uring

Control whether or not glusterfs is compiled with uring support or not.

sys-cluster/hpx

papi

Use dev-libs/papi for NaCl

perftools

Use dev-util/google-perftools for memory allocation

tbb

Use dev-cpp/tbb for memory allocation

sys-cluster/k3s

kubectl-symlink

Install a kubectl symlink that points to k3s.

rootless

Enables dependencies for running in rootless mode.

sys-cluster/keepalived

bfd

compile with support for Bidirectional Forwarding Detection (BFD).

json

compile with signal to dump configuration and stats as JSON.

regex

compile with support for regex in health checks

sys-cluster/kronosnet

lzo2

Add support for lzo2 compression

nss

Add support for tls via nss

openssl

Add support for tls via openssl

sys-cluster/legion

gasnet

Enable GASNet lib support

hwloc

Enable HWLoc lib support

sys-cluster/lmod

auto-swap

enable auto swapping of compiler

cache

enable caching of modules

duplicate-paths

allow duplicate entries in path

sys-cluster/minikube

libvirt

Build plugin for kvm

sys-cluster/mpich

mpi-threads

Enable MPI_THREAD_MULTIPLE

romio

Build the ROMIO MPI-IO component

sys-cluster/nomad

ui

do not embed the ui in the binary

sys-cluster/openmpi

cma

Enable the CMA (Cross Memory Attach) MCA

libompitrace

Enable support for contributed package libompitrace

peruse

Enable PERUSE interface

romio

Build the ROMIO MPI-IO component

sys-cluster/pacemaker

smtp

Enable SMTP support via net-libs/libesmtp

sys-cluster/pmix

munge

Enable authentication via munge

pmi

Build PMI1 and PMI2 interface

sys-cluster/rdma-core

lttng

Enable support for the LTTng tracer

neigh

Enable iwpmd support

python

Enable pyverbs support

sys-cluster/resource-agents

libnet

Force use of net-libs/libnet

rgmanager

Install resources for rgmanager

sys-cluster/slurm

html

Build html documentation

ipmi

Build support for collecting some ipmi stats

json

Add support for json-persing via json-c

multiple-slurmd

Allow multiple slurmd to run

munge

Enable authentication via munge

numa

Add NUMA awareness

nvml

Enable the NVML device discovery

ofed

Add Infiniband support via ofed

slurmdbd

Install SQL server for slurmdbd

slurmrestd

Enable interface to Slurm via REST API

torque

Enable perl scripts that emulates pbs (qstat, qsub etc.)

ucx

Enable Unified Communication X library support

yaml

Enable YAML support

sys-cluster/torque

autorun

Enable the AUTORUN_JOBS codebase

cgroups

Enable pbs_mom to use linux cgroups to isolate jobs

cpusets

Enable pbs_mom to utilize linux cpusets if available

munge

Enable authentication via munge

nvidia

Enable management of Nvidia GPUs

quickcommit

Enable the QUICKCOMMIT codebase

server

Enable compilation of pbs_server and pbs_sched

sys-cluster/ucx

numa

Add support for numa memory allocation

sys-cluster/vzctl

ploop

Add support for ploop devices via sys-cluster/ploop

vzmigrate

Add support for container migration

sys-devel/autogen

libopts

install the libopts tarball (a few packages want this for developing)

sys-devel/binutils

cet

Enable Intel Control-flow Enforcement Technology.

debuginfod

Enable debuginfod support via dev-libs/elfutils libdebuginfod

default-gold

Set ld to point to ld.gold instead of ld.bfd

gold

Build ld.gold linker

gprofng

Enable the next-generation gprofng profiler

multitarget

Adds support to binutils for cross compiling (does not work with gas)

pgo

Build binutils with Profile Guided Optimization (PGO) and LTO

plugins

Enable plugin support in tools

sys-devel/binutils-apple

classic

Use nm, otool, etc. from this ebuild instead of llvm-based tools

lto

Add support for Link-Time Optimization with LLVM

sys-devel/binutils-config

native-symlinks

Install native symlinks like 'as' or 'ar' to /usr/bin. Otherwise keep only ${CTARGET}-as and friends.

sys-devel/binutils-hppa64

cet

Enable Intel Control-flow Enforcement Technology.

debuginfod

Enable debuginfod support via dev-libs/elfutils libdebuginfod

default-gold

Set ld to point to ld.gold instead of ld.bfd

gold

Build ld.gold linker

gprofng

Enable the next-generation gprofng profiler

multitarget

Adds support to binutils for cross compiling (does not work with gas)

pgo

Build binutils with Profile Guided Optimization (PGO) and LTO

plugins

Enable plugin support in tools

sys-devel/bpf-toolchain

bin-symlinks

Symlink executables to usr/bin to be in default PATH (conflicts with crossdev bpf, and crossdev is preferable for a fully featured toolchain)

sys-devel/crosstool-ng

dtc

Require sys-apps/dtc

lzip

Require app-arch/lzip

meson

Require dev-build/meson

ninja

Require app-alternatives/ninja

rsync

Require net-misc/rsync

wget

Require net-misc/wget

sys-devel/distcc

gssapi

Enable support for net-libs/libgssglue

sys-devel/gcc

ada

Build the ADA language (GNAT) frontend

cet

Enable support for control flow hijacking protection. On amd64, this provides Intel Control Flow Enforcement Technology (CET). On arm64, this provides Branch Target Identification (BTI) and Pointer Authentication Code (PAC) support. This is only effective on amd64 or arm64. Only provides benefits on newer CPUs. For Intel, the CPU must be at least as new as Tiger Lake. For AMD, it must be at least as new as Zen 3. This is harmless on older CPUs, but provides no benefit either. For ARM64, PAC was introduced in armv8.3-a, and BTI was introduced in armv8.5-a. When combined with USE=hardened on amd64, GCC will set -fcf-protection by default when building software. The effect is minimal on systems which do not support it, other than a possible small increase in codesize for the NOPs. The generated code is therefore compatible with i686 at the earliest. On arm64, GCC will set -mbranch-protection=standard by default when building software.

d

Enable support for the D programming language

debug

Enables GCC's 'checking' facility via --enable-checking=yes,extra,rtl. This adds checks to various compiler passes for integrity and input validation. This can help catch possible miscompilations early as well as latent bugs which could become real problems in future, but at the cost of slower compile times when using GCC. Unrelated to backtraces.

default-stack-clash-protection

Build packages with stack clash protection on by default as a hardening measure. This enables -fstack-clash-protection by default which protects against large memory allocations allowing stack smashing. May cause slightly increased codesize, but modern compilers have been adapted to optimize well for this case, as this mitigation is now quite common. See https://developers.redhat.com/blog/2020/05/22/stack-clash-mitigation-in-gcc-part-3 and https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt.

default-znow

Request full relocation on start from ld.so by default. This sets the -z,now (BIND_NOW) flag by default on all linker invocations. By resolving all dynamic symbols at application startup, parts of the program can be made read-only as a hardening measure. This is closely related to RELRO which is also separately enabled by default. In some applications with many unresolved symbols (heavily plugin based, for example), startup time may be impacted.

fixed-point

Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)

go

Build the GCC Go language frontend.

graphite

Add support for the framework for loop optimizations based on a polyhedral intermediate representation

ieee-long-double

Use accelerated 128-bit IEEE long double ABI (ppc64le only)

jit

Enable libgccjit so other applications can embed gcc for Just-In-Time compilation.

libgdiagnostics

Provide libgdiagnostics (https://gcc.gnu.org/wiki/libgdiagnostics). This also installs the 'sarif-replay' tool.

libssp

Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES)

lto

Build using Link Time Optimizations (LTO). Note that GCC is always built with support for building other programs with LTO. This USE flag is for whether GCC itself is built and optimized with LTO.

modula2

Build the GCC Modula-2 language frontend.

objc

Build support for the Objective C code language

objc++

Build support for the Objective C++ language

objc-gc

Build support for the Objective C code language Garbage Collector

pgo

Build GCC using Profile Guided Optimization (PGO). GCC will build itself and then analyze the just-built binary and then rebuild itself using the data obtained from analysis of codepaths taken. It does not affect whether GCC itself supports PGO when building other software. This substantially increases the build time needed for building GCC itself.

rust

Build support for the Rust language, installs gccrs.

sanitize

Build support for various sanitizer functions (ASAN/TSAN/etc...) to find runtime problems in applications.

ssp

Build packages with stack smashing protection on by default

systemtap

enable systemtap static probe points

vtv

Build support for virtual table verification (a C++ hardening feature). This does not control whether GCC defaults to using VTV> Note that actually using VTV breaks ABI and hence the whole system must be built with -fvtable-verify.

sys-devel/gcc-apple

bootstrap

!DO NOT SET THIS FLAG YOURSELF! avoids need for autoconf during bootstrap stage2

objc

Build support for the Objective C code language

objc++

Build support for the Objective C++ language

sys-devel/gcc-config

cc-wrappers

Install and manage 'cc' and 'f77' wrappers in /usr/bin. Otherwise ignore them.

native-symlinks

Install native symlinks like 'gcc' or 'g++' to /usr/bin. Otherwise keep only ${CTARGET}-gcc and friends.

sys-devel/gettext

git

When running `autopoint`, use git to store the internal development files; this requires git at runtime, but will be faster/smaller than raw archives

sys-devel/sparse

gtk

Build the test-inspect utility (requires x11-libs/gtk+:3)

llvm

Build the sparse-llvm utility

xml

Build the c2xml utility (requires dev-libs/libxml2)

sys-fabric/mstflint

adb-generic-tools

Enable compiling the following tools: mstreg and mstlink

inband

Enable firmware updates for Mellanox SwitchX and ConnectIB devices

sys-fabric/opensm

tools

Install ssld extra tool

sys-firmware/broadcom-bt-firmware

compress-xz

Compress firmware using xz (app-arch/xz-utils) before installation

compress-zstd

Compress firmware using zstd (app-arch/zstd) before installation

sys-firmware/intel-microcode

hostonly

Only install ucode(s) supported by currently available (=online) processor(s)

initramfs

Install a small initramfs for use with CONFIG_MICROCODE_EARLY

split-ucode

Install the split binary ucode files (used by the kernel directly)

vanilla

Only install microcode updates from Intel's official microcode tarball

sys-firmware/ipxe

binary

Use pre-built binaries

iso

Build a bootable ISO for using PXE

lkrn

Build a linux kernel bootable file for using with grub/etc...

qemu

Build the required PXE ROM images for app-emulation/qemu

uefi32

Build a 32bit UEFI program for using PXE

uefi64

Build a 64bit UEFI program for using PXE

undi

Build a Universal Network Device Interface driver chainloading your existing PXE NIC into iPXE

usb

Build a bootable USB image for using PXE

vmware

Build the PXE ROM images that VMWare uses

sys-firmware/seabios

binary

Use official upstream pre-built binaries

seavgabios

Include SeaVGABIOS binaries (replacement for vgabios)

sys-firmware/sgabios

binary

Use pre-built binaries

sys-firmware/sigrok-firmware-fx2lafw

binary

Use official upstream pre-built binaries

sys-firmware/sof-firmware

tools

Tools to interact with sof firmwares (upstream expects them to be present, but allow to skip them for systems not able to install needed dependencies)

sys-firmware/vgabios

binary

Use official upstream pre-built binaries (only default and cirrus images)

sys-fs/android-file-transfer-linux

fuse

Add FUSE mount helper

zune

Enable support for Microsoft Zune

sys-fs/avfs

webdav

Allow mounting WebDAV shares via net-libs/neon

sys-fs/bcachefs-tools

fuse

Enable bcachefs FUSE support (experimental!)

sys-fs/btrfsmaintenance

systemd

Enable systemd services and timers instead of cron timers

sys-fs/btrfs-progs

convert

Build ext2 conversion utility (btrfs-convert)

experimental

Enable unstable and experimental features and install btrfs-corrupt-block, as needed by xfstests

reiserfs

Enable reiserfs support in btrfs-convert tool.

static

Build static binaries in addition to the dynamic ones

sys-fs/cryptmount

argv0switch

Default action given by progname.

cswap

Enable support for encrypted swap.

fsck

Check filesystems before mounting.

gcrypt

Support libgcrypt-encryption of keys.

largefile

Enable support for large files.

luks

Enable key management via LUKS

mount

Use systemd mount/umount for operations.

openssl

Support openssl-encryption of keys.

sys-fs/cryptsetup

argon2

Enable password hashing algorithm from app-crypt/argon2

fips

Enable FIPS mode restrictions

gcrypt

Use dev-libs/libgcrypt crypto backend

kernel

Use kernel crypto backend (mainly for embedded systems)

nettle

Use dev-libs/nettle crypto backend

openssl

Use dev-libs/openssl crypto backend

pwquality

Use dev-libs/libpwquality for password quality checking

ssh

Build cryptsetup-ssh for experimental support of token via SSH-server

urandom

Use /dev/urandom instead of /dev/random

sys-fs/dmraid

intel-led

Enable Intel LED support

led

Enable LED support

mini

Create a minimal binary suitable for early boot environments

sys-fs/dosfstools

compat

Install symlinks for legacy names of the tools

sys-fs/e2fsprogs

archive

Add support for mke2fs to read a tarball as input. This allows not needing privileges. Needs app-arch/libarchive.

cron

Install e2scrub_all cron script

fuse

Build fuse2fs, a FUSE file system client for ext2/ext3/ext4 file systems

tools

Build extfs tools (mke2fs, e2fsck, tune2fs, etc.)

sys-fs/ecryptfs-utils

gpg

Enable app-crypt/gnupg key module

openssl

Enable dev-libs/openssl key module

pkcs11

Enable PKCS#11 (Smartcards) key module

tpm

Enable support for Trusted Platform Module (TPM) using app-crypt/trousers

sys-fs/erofs-utils

fuse

Builds erofsfuse (requires sys-fs/fuse).

libdeflate

Use app-arch/libdeflate rather than sys-libs/zlib for handling deflate compression.

uuid

Enables UUID support via sys-apps/util-linux.

sys-fs/ext4magic

expert-mode

Builds ext4magic with expert mode. Highly useful in recovering data from a corrupted filesystem

file-attr

Enable the recovery of file attributes (append, immutable, nodump etc)

sys-fs/lessfs

filelog

Enable the ability to log to a file instead of syslog

memtrace

Enable leefs to create a report regarding the memory allocation. This feature should be used for debugging purposes to avoid performance degradation

sys-fs/loop-aes

extra-ciphers

Enable extra ciphers

keyscrub

Protects the encryption key in memory but takes more cpu resources

sys-fs/lvm2

lvm

Build all of LVM2 including daemons and tools like lvchange, not just the device-mapper library (for other packages to use). If your system uses LVM2 for managing disks and partitions, enable this flag.

sanlock

Enable lvmlockd with support for sanlock

thin

Support for thin volumes

sys-fs/mdadm

corosync

Support for corosync cluster engine

sys-fs/mtd-utils

ubifs

Build UBIFS tools

sys-fs/mtpfs

mad

Enable handling of MP3's metadata

sys-fs/ntfs3g

fuse

Enable ntfs-3g FUSE driver

mount-ntfs

Install mount.ntfs symlink

ntfsdecrypt

Build and install the ntfsdecrypt application.

ntfsprogs

Enable ntfsprogs

sys-fs/quota

netlink

Compile daemon receiving quota messages via netlink

rpc

Enable quota interaction via RPC

sys-fs/squashfs-tools-ng

tools

Build the gensquashfs, rdsquashfs, sqfs2tar, sqfsdiff, and tar2sqfs tools

sys-fs/udisks

daemon

Build the system daemon, not just the client tool

elogind

Use sys-auth/elogind for session tracking

lvm

Add support for Logical Volume Management via sys-fs/lvm2.

systemd

Support sys-apps/systemd's logind

vdo

Enable Virtual Data Optimizer support.

zram

Enable ZRAM support (requires sys-apps/systemd).

sys-fs/zfs

kernel-builtin

Disable dependency on sys-fs/zfs-kmod under the assumption that ZFS is part of the kernel source tree

minimal

Don't install python scripts (arcstat, dbufstat etc) and avoid dependency on dev-lang/python

pam

Install zfs_key pam module, for automatically loading zfs encryption keys for home datasets

rootfs

Enable dependencies required for booting off a pool containing a rootfs

test-suite

Install regression test suite

sys-fs/zfs-auto-snapshot

cron

Install /etc/cron.* files

default-exclude

Only take snapshots of datasets with com.sun:auto-snapshot=true property set

sys-fs/zfs-kmod

dist-kernel-cap

Prevents upgrading to an unsupported kernel version when combined with USE=dist-kernel

rootfs

Pull dependencies and check kernel options required for root-on-zfs

sys-kernel/asahi-sources

symlink

Automatically symlink the kernel sources to /usr/src/linux

sys-kernel/dracut

dracut-cpio

Build the enhanced 'dracut-cpio' program

sys-kernel/genkernel

firmware

Prefer system firmware sys-kernel/linux-firmware over local copy.

sys-kernel/gentoo-kernel

experimental

Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".

generic-uki

Build and install a generic initramfs and Unified Kernel Image, this is intended for building binpkgs with a pre-generated UKI included (EXPERIMENTAL).

hardened

Use selection of hardening options recommended by Kernel Self Protection Project

initramfs

Build initramfs along with the kernel.

sys-kernel/gentoo-kernel-bin

generic-uki

Install a prebuilt generic initramfs and Unified Kernel Image (EXPERIMENTAL).

initramfs

Build initramfs along with the kernel.

sys-kernel/gentoo-sources

experimental

Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".

sys-kernel/installkernel

dracut

Generate an initramfs or UKI on each kernel installation

efistub

EXPERIMENTAL: Update UEFI configuration on each kernel installation

grub

Re-generate grub.cfg on each kernel installation, used grub.cfg is overridable with GRUB_CFG env var

refind

Install a Gentoo icon for rEFInd alongside the (unified) kernel image, used icon is overridable with REFIND_ICON env var

systemd

Use systemd's kernel-install to install kernels, overridable with SYSTEMD_KERNEL_INSTALL env var

systemd-boot

Use systemd-boot's native layout by default

ugrd

Generate an initramfs using UGRD on each kernel installation

uki

Install UKIs to ESP/EFI/Linux for EFI stub booting and/or bootloaders with support for auto-discovering UKIs

ukify

Build an UKI with systemd's ukify on each kernel installation

sys-kernel/kpatch

contrib

Enable contrib kpatch services files.

kmod

Enable a kernel module (.ko file) which provides an interface for the patch modules to register new functions for replacement.

kpatch

Enable a command-line tool which allows a user to manage a collection of patch modules.

kpatch-build

Enable tools which convert a source diff patch to a patch module.

sys-kernel/linux-firmware

compress-xz

Compress firmware using xz (app-arch/xz-utils) before installation

compress-zstd

Compress firmware using zstd (app-arch/zstd) before installation

deduplicate

Create symlinks for all firmware that is duplicate using rdfind

initramfs

Create and install initramfs for early microcode loading in /boot (only AMD for now)

redistributable

Install also non-free (but redistributable) firmware files

savedconfig

Allows individual selection of firmware files

unknown-license

Install firmware files whose license is unknown

sys-kernel/mips-sources

experimental

Apply experimental (80xx) patches.

ip27

Enables additional support for SGI Origin (IP27)

ip28

Enables additional support for SGI Indigo2 Impact R10000 (IP28)

ip30

Enables support for SGI Octane (IP30, 'Speedracer')

sys-kernel/rt-sources

deblob

Remove binary blobs from kernel sources to provide libre license compliance.

sys-kernel/scx

openrc

Enable support for sys-apps/openrc

sys-kernel/vanilla-kernel

initramfs

Build initramfs along with the kernel.

sys-libs/binutils-libs

64-bit-bfd

Support 64-bit targets even on 32-bit hosts (is ignored on 64-bit hosts)

cet

Enable Intel Control-flow Enforcement Technology.

multitarget

Enable all possible targets in libbfd

sys-libs/freeipmi

nagios

Install a nagios plugin to check sensors' status.

without-root

Configure whether or not to check for root access in ipmi tools.

sys-libs/gdbm

berkdb

enable compatibility layer for UNIX-like dbm and ndbm interfaces

sys-libs/glibc

cet

Enable Intel Control-flow Enforcement Technology (needs binutils 2.29 and gcc 8)

clone3

Enable the new clone3 syscall within glibc. Can be disabled to allow compatibility with older Electron applications.

compile-locales

build *all* locales in src_install; this is generally meant for stage building only as it ignores /etc/locale.gen file and can be pretty slow

crypt

build and install libcrypt and crypt.h

debug

When USE=hardened, allow fortify/stack violations to dump core (SIGABRT) and not kill self (SIGKILL)

experimental-loong

Add experimental LoongArch patchset

gd

build memusage and memusagestat tools

hash-sysv-compat

enable sysv linker hashes in glibc for compatibility with binary software (EAC via wine/proton)

multiarch

enable optimizations for multiple CPU architectures (detected at runtime)

multilib-bootstrap

Provide prebuilt libgcc.a and crt files if missing. Only needed for ABI switch.

nscd

Build, and enable support for, the Name Service Cache Daemon

perl

Install additional scripts written in Perl

ssp

protect stack of glibc internals

stack-realign

Realign the stack in the 32-bit build for compatibility with older binaries at some performance cost

static-pie

Enable static PIE support (runtime files for -static-pie gcc option).

suid

Make internal pt_chown helper setuid -- not needed if using Linux and have /dev/pts mounted with gid=5

systemtap

enable systemtap static probe points

sys-libs/ldb

doc

Builds documentation

ldap

Enable LDAP support

lmdb

Enable LMDB backend

python

Enable Python support

sys-libs/libblockdev

bcache

Enable block device cache support.

cryptsetup

Enable sys-fs/cryptsetup support

device-mapper

Enable support for device-mapper from sys-fs/lvm2

dmraid

Support for dmraid devices, also known as ATA-RAID, or Fake RAID.

escrow

Support for building crypto plugin with escrow device support

kbd

Enable kernel block device support.

lvm

Enable support for Logical Volume Management via sys-fs/lvm2.

nvme

Add nvme support via sys-libs/libnvme

tools

Build tools

vdo

Enable Virtual Data Optimizer support.

sys-libs/libcap

tools

Install captree, which requires dev-lang/go

sys-libs/libnbd

fuse

Install the sys-fs/fuse powered nbdfuse.

go

Build bindings for dev-lang/go

uri-support

Enable nbd:// URI support via dev-libs/libxml2.

sys-libs/libnvme

json

Support JSON output via dev-libs/json-c

keyutils

Add support for sys-apps/keyutils

uuid

UUID support via sys-apps/util-linux

sys-libs/libseccomp

experimental-loong

Add experimental LoongArch patchset

sys-libs/libunwind

debug-frame

Adds support for DWARF .debug_frame section: Use the information from this section if available

libatomic

Use libatomic instead of builtin atomic operations

sys-libs/libxcrypt

compat

Build with compatibility interfaces for other crypt implementations

headers-only

Build and install only the headers.

system

Install as system libcrypt.so rather than to an alternate directory (will collide with sys-libs/glibc's version)

sys-libs/minizip-ng

compat

Enable compatibility with sys-libs/zlib's USE=minizip

openssl

Use dev-libs/openssl for further encryption capabilities

sys-libs/musl-nscd

minimal

Only installs the header files

sys-libs/ncurses

ada

Add bindings for the ADA programming language

stack-realign

Realign the stack in the 32-bit build for compatibility with older binaries at some performance cost. Avoids crashes in older 32-bit binaries. Only affects x86/32-bit multilib builds on amd64.

tinfo

Build curses library (libncurses) sep from the low-level terminfo library (libtinfo) -- usually needed only for binary packages -- but it is binary compatible in either mode

trace

Enable test trace() support in ncurses calls

sys-libs/ncurses-compat

stack-realign

Realign the stack in the 32-bit build for compatibility with older binaries at some performance cost. Avoids crashes in older 32-bit binaries. Only affects x86/32-bit multilib builds on amd64.

tinfo

Build curses library (libncurses) sep from the low-level terminfo library (libtinfo) -- usually needed only for binary packages -- but it is binary compatible in either mode

sys-libs/newlib

nano

Build additional newlib-nano library

sys-libs/pam

berkdb

Build the pam_userdb module, that allows to authenticate users against a Berkeley DB file. Please note that enabling this USE flag will create a PAM module that links to the Berkeley DB (as provided by sys-libs/db) installed in /usr/lib and will thus not work for boot-critical services authentication.

sys-libs/readline

utils

Install rlfe (ReadLine Front-End) helper tool -- a wrapper program for making any stdin use readline

sys-libs/snapd-glib

qml

Build the QML bindings

sys-libs/talloc

compat

Enable extra compatibility stuff

sys-libs/timezone-data

leaps-timezone

Install the set of "right" timezones; these timezones include leap seconds when counting seconds since the epoch (while POSIX does not) as they are based on the TAI (International Atomic Time) clock

zic-slim

Default to 'slim' file format for /usr/share/zoneinfo. Otherwise 'fat' format is used. Not all programs can handle 'slim' format'.

sys-libs/zlib

minizip

include the minizip library for quick and dirty zip extraction

sys-libs/zlib-ng

compat

Enable compatibility to sys-libs/zlib

sys-power/apcupsd

modbus

Enable MODBUS support over USB

sys-power/autosuspend

mpd

Enable support for the Music Player Daemon

sys-power/intel-undervolt

elogind

Use elogind hook to apply voltage after system sleep

sys-power/nut

gpio

Includes all UPS drivers that use GPIO.

i2c

Includes all UPS drivers that use I2C.

ipmi

Includes all UPS drivers that use ipmi.

modbus

Includes all UPS drivers that use MODBUS.

monitor

Add a QT5 gui monitor.

serial

Includes all UPS drivers that use SERIAL.

snmp

Includes all UPS drivers that use SNMP.

usb

Includes all UPS drivers that use USB.

xml

Includes all UPS drivers that use XML.

sys-power/nvclock

gtk

Install the GTK+ based graphical interface

nvcontrol

Add NVCONTROL support for OpenGL options

sys-power/suspend

crypt

Allows suspend and resume from encrypted disk

sys-process/atop

modules

Build netatop kernel module and install netatopd daemon.

sys-process/audit

gssapi

Enable GSSAPI support

io-uring

Enable support for io-uring. Doesn't need the library but needs at least kernel 5.1.

sys-process/bottom

battery

Include support for laptop battery information

gpu

Include support for GPU temperature and memory usage information

zfs

Include support for ZFS ARC memory usage information

sys-process/criu

bpf

Add support for BPF programs via dev-libs/libbpf

filecaps

Install the criu binary with file capabilities to allow for rootless CRIU

nftables

Add support for net-firewall/nftables

setproctitle

Use dev-libs/libbsd to make process titles of service workers to be more verbose

sys-process/cronie

anacron

Install the periodic anacron command scheduler.

sys-process/fcron

debug

Enable debug code and output. Since version 3.0.5 this will no longer force foreground execution, and fcron will be able to run as a service properly.

mta

Enable mta support for sending emails from fcron

pam

Enable PAM support for fcron. This means that fcron will pass through the "fcron" stack before executing the jobs, and fcrontab will use the "fcrontab" stack to authenticate the user before editing its crontab file.

system-crontab

Set up fcron to respect /etc/crontab and /etc/cron.d. If this flag is disabled, /etc/cron.d and /etc/crontab will be ignored, but /etc/cron.{hourly,daily,weekly,monthly} will still be respected. Also this creates /usr/bin/crontab symlink.

sys-process/htop

delayacct

Enable Linux delay accounting support via dev-libs/libnl

hwloc

Use sys-apps/hwloc for CPU affinity support

openvz

Enable openvz support

vserver

Enable vserver support

sys-process/lsof

rpc

support looking up RPC service info

sys-process/nvtop

unicode

Enable support for ncurses Unicode choice

sys-process/procps

elogind

Use sys-auth/elogind for session tracking.

kill

Build the kill program

modern-top

Enables new startup defaults of top. Keeps old defaults if disabled

ncurses

Build programs that use ncurses: top, slabtop, watch

skill

Build the skill and snice programs

sys-process/systemd-cron

cron-boot

Include support for the boot timer.

etc-crontab-systemd

Use dedicated /etc/crontab-systemd instead of parsing /etc/crontab

minutely

Support /etc/cron.minutely

runparts

Use traditional run-parts instead of creating jobs for each cron.* entry

setgid

Compile setgid C helper for crontab. Needs GCC or Clang.

yearly

Support /etc/cron.yearly

sys-process/tini

args

Enable argument parsing.

virtual/blas

eselect-ldso

Enable runtime library switching by eselect and ld.so.

virtual/cblas

eselect-ldso

Enable runtime library switching by eselect and ld.so.

virtual/jdk

headless-awt

Don't install the X backend for AWT, needed by some GUIs

virtual/lapack

eselect-ldso

Enable runtime library switching by eselect and ld.so.

virtual/lapacke

eselect-ldso

Enable runtime library switching by eselect and ld.so.

virtual/linux-sources

firmware

Install linux kernel firmware

virtual/mpi

nullmpi

Allow sys-cluster/nullmpi a minimal incomplete MPI implementation as a provider

romio

Enable romio, a high-performance portable MPI-IO

virtual/mysql

embedded

Build embedded server (libmysqld)

server

Build server (mysqld)

virtual/pkgconfig

native-symlinks

Install generic symlinks like pkgconf and pkg-config. If this flag is disabled, only CHOST-prefixed pkg-config executables will be available to end users and ebuilds.

virtual/podofo-build

boost

Add support for boost

tools

Build and install commandline tools

virtual/rust

profiler

Build the profiler runtime and rust-demangler tool (needed for '-C profile-generate' or '-C instrument-coverage' codegen opts)

rustfmt

Install rustfmt, Rust code formatter

virtual/ssh

minimal

Prefer net-misc/dropbear over net-misc/openssh

virtual/wine

proton

Enable Valve Software's fork of Wine

staging

Enable Wine-Staging's Patchset

www-apache/mod_auth_openidc

brotli

Add support for brotli compressed data using app-arch/brotli

redis

Add support for the Redis caching via dev-libs/hiredis

www-apache/mod_backtrace

unwind

Use sys-libs/libunwind to provide better resolution of function names.

www-apache/mod_musicindex

archive

Add archive support

cache

Add File cache support

mysql

Add MySQL cache support

www-apache/mod_nss

ecc

enable Elliptical Curve Cyptography

www-apache/mod_perl

ithreads

Build for use with thread-capable perl, needs same setting as in dev-lang/perl

www-apache/mod_security

fuzzyhash

Support fuzzy hash computations (to detect malware, for example) using the app-crypt/ssdeep package.

geoip

Pull in dev-libs/geoip for use by the SecGeoLookupDb directive.

jit

Add support for the PCRE Just-in-Time optimisation, as enabled by dev-libs/libpcre with jit USE flag enabled. Might not be available on hardened systems.

json

Suppose JSON in the request body parser through dev-libs/yajl.

mlogc

Build and install the ModSecurity Audit Log Collector (mlogc).

pcre2

Use dev-libs/libpcre2 as regex implementation

www-apache/pwauth

domain-aware

Ignore leading domain names in username (Windows compat)

faillog

Log failed login attempts

ignore-case

Ignore string case in username (mostly Windows compat)

www-apps/cgit

highlight

Enable source code highlighting

lua

Enable support for Lua scripting

www-apps/drupal

uploadprogress

Install dev-php/pecl-uploadprogress package

www-apps/gitea

acct

User and group management via acct-*/git packages

gogit

(EXPERIMENTAL) Use go-git variants of Git commands.

www-apps/hugo

extended

Enable SASS/SCSS and WebP encoding support

www-apps/icingaweb2

apache2-server

Adds support for the apache2-server

fpm

Adds FPM support to php

nginx

Adds support for nginx

www-apps/ikiwiki

extras

Installs additional modules used by ikiwiki plugins

www-apps/klaus

ctags

Enable support for Exuberant ctags; makes all source code symbols hyperlinks to their definitions

www-apps/postfixadmin

vacation

Install vacation.pl script and dependencies

www-apps/redmine

markdown

Enable support for Markdown

minimagick

Enable image processing support via dev-ruby/mini_magick

passenger

Enable support for www-apache/passenger

standalone

Enable standalone mode with www-servers/puma

www-apps/roundup

jinja

Enable Jinja2 support

markdown

Enable markdown rendering

pyjwt

Enable jwt tokens for login

tz

Enable full support of timezone

whoosh

Enable Whoosh full-text indexer

xapian

Enable Xapian full-text indexer

www-apps/rt

apache

Add www-servers/apache support

lighttpd

Add www-servers/lighttpd support

nginx

Add www-servers/nginx support

www-apps/tt-rss

daemon

Install additional init scripts for automated RSS updates

www-apps/ttyd

mbedtls

Use mbedTLS replacement for OpenSSL

www-apps/webdavcgi

rcs

Adds support for a revision controlled backend with RCS (dev-vcs/rcs)

www-apps/wordpress

akismet

Installs Akismet comment spam plug-in

themes

Installs themes (including default theme)

www-apps/xpra-html5

brotli

Install assets compressed with brotli

gzip

Install assets compressed with gzip

minify

Minify JavaScript code for smaller transfers

www-client/chromium

debug

Enable DCHECK feature with severity configurable at runtime. Mostly intended for debugging and development, NOT RECOMMENDED for general use.

ffmpeg-chromium

(binpkg only) Use Chromium FFmpeg fork (media-video/ffmpeg-chromium) rather than mainline FFmpeg (media-video/ffmpeg)

gtk4

Build with GTK4 headers.

hangouts

Enable support for Google Hangouts features such as screen sharing

headless

Build Ozone only with headless backend, NOT RECOMMENDED for general use.

official

Enable Official build instead of Developer build.

pax-kernel

Allow building on a PaX-enabled kernel

pgo

Build with Profile Guided Optimizations (2-stage compilation)

proprietary-codecs

Enable codecs for patent-encumbered audio and video formats.

system-harfbuzz

Use system media-libs/harfbuzz instead of the bundled library.

system-icu

Use system dev-libs/icu instead of the bundled one

system-png

Use system media-libs/libpng instead of the bundled library

system-zstd

Use system app-arch/zstd instead of the bundled one.

widevine

Unsupported closed-source DRM capability (required by Netflix VOD)

www-client/dillo

mbedtls

Build against the net-libs/mbedtls library for TLS support.

openssl

Build against the dev-libs/openssl library for TLS support.

xembed

Enable XEmbed protocol support

www-client/elinks

bittorrent

Enable support for the BitTorrent protocol

finger

Enable support for the finger protocol

gemini

Enable support for the gemini protocol

gopher

Enable support for the gopher protocol

libcss

Enable support for cascading style sheets via dev-libs/libcss

mouse

Make elinks to grab all mouse events

tre

Enable support for regex searches via dev-libs/tre

xml

Enable support for bookmarks via dev-libs/expat

www-client/firefox

clang

Use Clang compiler instead of GCC

eme-free

Disable EME (DRM plugin) capability at build time

gmp-autoupdate

Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles

gnome-shell

Integrate with gnome-base/gnome-shell search

hwaccel

Force-enable hardware-accelerated rendering (Mozilla bug 594876)

jumbo-build

Enable unified build - combines source files to speed up build process, but requires more memory

libproxy

Enable libproxy support

openh264

Use media-libs/openh264 for H264 support instead of downloading binary blob from Mozilla at runtime

pgo

Add support for profile-guided optimization for faster binaries - this option will double the compile time

pulseaudio

Add sound server support via media-libs/libpulse (may be PulseAudio or Pipewire, or apulse if installed)

sndio

Enable support for the media-sound/sndio backend

system-av1

Use the system-wide media-libs/dav1d and media-libs/libaom library instead of bundled

system-harfbuzz

Use the system-wide media-libs/harfbuzz instead of bundled and media-gfx/graphite2 in most cases

system-icu

Use the system-wide dev-libs/icu instead of bundled

system-jpeg

Use the system-wide media-libs/libjpeg-turbo instead of bundled

system-libevent

Use the system-wide dev-libs/libevent instead of bundled

system-libvpx

Use the system-wide media-libs/libvpx instead of bundled

system-png

Use the system-wide media-libs/libpng instead of bundled (requires APNG patches)

system-webp

Use the system-wide media-libs/libwebp instead of bundled

wasm

Sandbox certain third-party libraries through WebAssembly using RLBox

wifi

Enable necko-wifi for NetworkManager integration, and access point MAC address scanning for better precision with opt-in geolocation services

www-client/firefox-bin

gmp-autoupdate

Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles

www-client/jd

migemo

Enable migemo support for Japanese

oniguruma

Use dev-libs/oniguruma for regular expression

www-client/links

freetype

Enable media-libs/freetype support

libevent

Enable dev-libs/libevent support

www-client/lynx

gnutls

Use gnutls library for HTTPS support (openssl is the default library for HTTPS support).

ssl

Enable HTTPS support.

www-client/microsoft-edge

mip

Install Microsoft Information Protection plugin.

www-client/microsoft-edge-beta

mip

Install Microsoft Information Protection plugin.

www-client/microsoft-edge-dev

mip

Install Microsoft Information Protection plugin.

www-client/netsurf

bmp

Bitmap (BMP and ICO) image support via media-libs/libnsbmp

gtk

Build GTK3 GUI

psl

Use public suffix list from media-libs/libnspsl to detect supercookies (recommended)

rosprite

RISC OS Sprite bitmap image support via media-libs/librosprite

svgtiny

Use media-libs/libsvgtiny instead of gnome-base/librsvg for SVG support

truetype

Use media-libs/freetype for text in the framebuffer frontend

www-client/opera

ffmpeg-chromium

Use Chromium FFmpeg fork (media-video/ffmpeg-chromium) rather than mainline FFmpeg (media-video/ffmpeg)

proprietary-codecs

Enable codecs for patent-encumbered audio and video formats.

www-client/opera-beta

ffmpeg-chromium

Use Chromium FFmpeg fork (media-video/ffmpeg-chromium) rather than mainline FFmpeg (media-video/ffmpeg)

proprietary-codecs

Enable codecs for patent-encumbered audio and video formats.

www-client/opera-developer

ffmpeg-chromium

Use Chromium FFmpeg fork (media-video/ffmpeg-chromium) rather than mainline FFmpeg (media-video/ffmpeg)

proprietary-codecs

Enable codecs for patent-encumbered audio and video formats.

www-client/qutebrowser

adblock

Enable Brave's ABP-style adblocker library for improved adblocking

widevine

Unsupported closed-source DRM capability (required by Netflix VOD)

www-client/seamonkey

chatzilla

Build Mozilla's IRC client (default on)

custom-optimization

Build with user-specified compiler optimizations (-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)

gmp-autoupdate

Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles

ipc

Use inter-process communication between tabs and plugins. Allows for greater stability in case of plugin crashes

lto

Enable Link Time Optimization (LTO). Requires Gold linker

system-av1

Use the system-wide media-libs/dav1d and media-libs/libaom library instead of bundled

system-harfbuzz

Use the system-wide media-libs/harfbuzz instead of bundled

system-icu

Use the sytem-wide dev-libs/icu instead of bundled

system-jpeg

Use the system-wide media-libs/libjpeg-turbo instead of bundled

system-libevent

Use the system-wide dev-libs/libevent instead of bundled

system-libvpx

Use the system-wide media-libs/libvpx instead of bundled

system-png

Use the system-wide media-libs/libpng instead of bundled (requires APNG patches)

system-sqlite

Use the system-wide dev-db/sqlite installation with secure-delete enabled

webrtc

Enable WebRTC support. Disabled by default due to privacy concerns.

www-client/surf

savedconfig

Without a saved config.h, this package depends on net-misc/curl and x11-terms/st for a default download mechanism

tabbed

Install surf-open.sh script for running surf in x11-misc/tabbed

www-client/uget

aria2

Enable support for net-misc/aria2 through xmlrpc. You'll find the plugin in the app's settings.

control-socket

Enable JSON-RPC over unix domain socket

openssl

Use dev-libs/openssl instead of net-libs/gnutls

rss

Enable uGet feed messages

www-client/vivaldi

ffmpeg-chromium

Use Chromium FFmpeg fork (media-video/ffmpeg-chromium) rather than mainline FFmpeg (media-video/ffmpeg)

proprietary-codecs

Use system FFmpeg library to support patent-encumbered media codecs

widevine

Unsupported closed-source DRM capability (required by Netflix VOD)

www-client/vivaldi-snapshot

ffmpeg-chromium

Use Chromium FFmpeg fork (media-video/ffmpeg-chromium) rather than mainline FFmpeg (media-video/ffmpeg)

proprietary-codecs

Use system FFmpeg library to support patent-encumbered media codecs

widevine

Unsupported closed-source DRM capability (required by Netflix VOD)

www-client/w3m

gdk-pixbuf

Enable support for x11-libs/gdk-pixbuf

lynxkeymap

If you prefer Lynx-like key binding

www-misc/litmus

libproxy

Support for automatic proxy configuration management through net-libs/libproxy.

libxml2

Use dev-libs/libxml2 to parse XML

pkcs11

Support for PKCS #11 through PaKChoiS (dev-libs/pakchois).

www-plugins/lightspark

ppapi

Install the PPAPI plugin (for Chromium)

rtmp

Enable Real Time Messaging Protocol using librtmp

www-plugins/passff-host

chrome

Install plugin for chrome (which also includes opera)

chromium

Install plugin for chromium

firefox

Install plugin for firefox

vivaldi

Install plugin for vivaldi

www-servers/apache

static

Link in apache2 modules statically rather then plugins

suexec

Install suexec with apache

suexec-caps

Install suexec with capabilities instead of SUID

suexec-syslog

Log suexec to syslog instead of to a separate file

www-servers/caddy

events-handlers-exec

Builds a module which lets user exec command on Caddy events https://caddyserver.com/docs/modules/events.handlers.exec https://caddyserver.com/docs/caddyfile/options#event-options

security

Authentication, Authorization, and Accounting. LDAP, OAuth, SAML, MFA, 2FA, JWT etc.. https://caddyserver.com/docs/modules/security https://github.com/greenpau/caddy-security

www-servers/civetweb

server

Build standalone server

www-servers/fnord

auth

Enable HTTP authentication support

www-servers/gatling

diet

Compile against dev-libs/dietlibc

www-servers/h2o

libh2o

Build and install libh2o

mruby

Enable support for mruby

www-servers/kore

acme

Add support for ACME

http

Add support for HTTP

json

Add support for JSONRPC

openssl

Use the openssl TLS backend

www-servers/lighttpd

brotli

Enable output compression via app-arch/brotli (recommended)

gnutls

Build module for TLS via net-libs/gnutls

libdeflate

Enable output compression via app-arch/libdeflate

maxminddb

Add support for geolocation using dev-libs/libmaxminddb

mbedtls

Build module for TLS via net-libs/mbedtls

nettle

Use dev-libs/nettle as crypto library

nss

Build module for TLS via Mozilla's Network Security Services

webdav

Enable webdav properties

zlib

Enable output compression via gzip or deflate algorithms from sys-libs/zlib

zstd

Enable output compression via Zstandard (app-arch/zstd) algorithm

www-servers/nginx

aio

Enables file AIO support

http

Enable HTTP core support

http2

Enable HTTP2 module support

http3

Enable HTTP3 module support

http-cache

Enable HTTP cache support

ktls

Enable Kernel TLS offload (kTLS)

libatomic

Use libatomic instead of builtin atomic operations

pcre2

Enable support for pcre2

pcre-jit

Enable JIT for pcre

rtmp

NGINX-based Media Streaming Server

ssl

Enable HTTPS module for http. Enable SSL/TLS support for POP3/IMAP/SMTP for mail.

www-servers/nginx-unit

php8-1

Support for PHP 8.1

php8-2

Support for PHP 8.2

php8-3

Support for PHP 8.3

www-servers/pshs

magic

Enable automatic detection of Content-Type using libmagic (sys-apps/file)

qrcode

Enable generating QRCodes for server URL

www-servers/sniproxy

dns

Enable DNS resolver via net-libs/udns

largefile

Enable large file support (so we can log more than 2GB)

rfc3339

Use RFC3339 timestamp format in log.

www-servers/tomcat

extra-webapps

Build also the docs and examples webapp

www-servers/uwsgi

embedded

Embed plugins instead of building them as real plugins. When disabling this USE flag make sure you specify all used plugins in your uWSGI configuration. Note: Language plugins will always be built as real plugins.

go

Build the gccgo plugin to run Go applications.

json

Support json as a configuration file format.

routing

Enable routing support

yajl

Use dev-libs/yajl instead of dev-libs/jansson for parsing JSON configuration files (if USe=json is set)

yaml

Support yaml as a configuration file format.

zeromq

Enable logging and deployment via ZeroMQ.

www-servers/xsp

developer

creates .mdb files for either Release and Debug

net35

use .NET 3.5 Framework

net40

use .NET 4.0 Framework

net45

use .NET 4.5 Framework

x11-apps/igt-gpu-tools

chamelium

Enables support for building Chamelium tests

overlay

Build the intel-gpu-overlay utility

runner

Build the test runner

tests

Build and install tests

X

Enable intel-gpu-overlay xlib/cairo backend

xv

Enable intel-gpu-overlay xv backend

x11-apps/xdpyinfo

dmx

Builds support for Distributed Multiheaded X x11-base/xorg-server

x11-apps/xinit

twm

Control dependencies on legacy apps (xterm, twm, ...). Safe to disable if you use a modern desktop environment.

x11-base/xorg-server

elogind

Use elogind to get control over framebuffer when running as regular user

unwind

Enable libunwind usage for backtraces

xcsecurity

Build Security extension

xephyr

Build the Xephyr server

xnest

Build the Xnest server

xorg

Build the Xorg X server (HIGHLY RECOMMENDED)

xvfb

Build the Xvfb server

x11-base/xwayland

libei

Enable emulated input using dev-libs/libei

unwind

Enable libunwind usage for backtraces

xcsecurity

Build Security extension

x11-drivers/nvidia-drivers

kernel-open

Use the open source variant of the drivers (Turing/Ampere+ GPUs only, aka GTX 1650+ -- recommended with >=560.xx drivers if usable)

persistenced

Install the persistence daemon for keeping devices state when unused (e.g. for headless)

powerd

Install the NVIDIA dynamic boost support daemon (only useful with specific laptops, ignore if unsure)

static-libs

Install the XNVCtrl static library for accessing sensors and other features

tools

Install additional tools such as nvidia-settings

x11-drivers/xf86-video-geode

ztv

Enable building the V4L2 ZTV driver

x11-drivers/xf86-video-intel

sna

Enable SandyBridge's New Acceleration (useful on all chipsets, not just SandyBridge)

tools

Build the intel-virtual-output tool

uxa

Enable UMA Acceleration Architecture

xvmc

Enables X-Video Motion Compensation support

x11-drivers/xf86-video-qxl

xspice

Include Xspice, a standard X server that is also a Spice server

x11-libs/agg

gpc

Enable gpc polygon clipper library

x11-libs/cairo

glib

Compile with GLib Object System support

x11-libs/fltk

games

Builds and installs some extra games

x11-libs/fox

tools

Install adie, calculator, shutterbug, and pathfinder apps.

x11-libs/gtk+

broadway

Enable the GDK Broadway backend

cloudproviders

Enable GtkPlacesSidebar to access cloud services

colord

Use x11-misc/colord for color management in printing

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

x11-libs/gtkdatabox

glade

Build with libglade and glade-3 supports, which includes a glade's module for GtkDataBox widget

x11-libs/gtkmathview

mathml

Install additional fonts for proper mathml support.

t1lib

Enable media-libs/t1lib support

x11-libs/gtksourceview

glade

Install a glade catalog file

x11-libs/libdlo

test-program

Build the program for testing Displaylink devices.

x11-libs/libdrm

tools

Install optional tests and tools

x11-libs/libfm

automount

Use gnome-base/gvfs for automounting

udisks

Use libfm's udisks-based volume monitor implementation instead of using the one from gvfs

vala

Support custom actions in menus

x11-libs/libQGLViewer

designer

Installs dev-qt/designer plugin.

x11-libs/libSM

uuid

Use UUID for session identification instead of IP address and system time.

x11-libs/libwnck

tools

Install wnckprop-3 and wnck-urgency-monitor-3 command-line tools

x11-libs/libXaw

deprecated

Install deprecated Xaw6 library.

x11-libs/libxcb

xkb

Enable the XCB keyboard extension

x11-libs/libXfont2

bzip2

Support bzip2 compressed PCF fonts.

truetype

Use media-libs/freetype for font rasterization.

x11-libs/libxkbcommon

tools

Build the xkbcli tools

x11-libs/pango

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

X

Build and install the legacy pangoxft library

x11-libs/pixman

loongson2f

Enable Loongson2f MMI optimizations.

x11-libs/qscintilla

designer

Build plugin for Qt Designer

x11-libs/qwt

designer

Installs dev-qt/designer plugin.

polar

Install the QwtPolar headers

x11-libs/tslib

evdev

Build experimental input module

uinput

Provide alternative ts_uinput evdev device

x11-libs/vte

icu

Enable legacy charset support using dev-libs/icu

systemd

Support moving terminal child processes to their own systemd user scopes to avoid terminal getting killed due to child causing OOM

x11-libs/wxGTK

gstreamer

Enable the wxMediaCtrl class for playing audio and video through gstreamer.

sdl

Use Simple Directmedia Layer (media-libs/libsdl) for audio.

x11-libs/xapp

mate

Install integrations for mate-base/mate

xfce

Install integrations for xfce-base/xfce4-meta

x11-misc/alock

doc

Build and install manpage with app-text/asciidoc.

x11-misc/appmenu-gtk-module

gtk2

Build module for GTK+2

x11-misc/autorandr

launcher

Install the launcher, i.e., an alternative to the udev/systemd hooks

x11-misc/bumblebee

bbswitch

Add dependency on sys-power/bbswitch for PM feature

x11-misc/clipmenu

dmenu

Use dmenu as default launcher

fzf

Use fzf as default launcher

rofi

Use rofi as default launcher

x11-misc/colord

argyllcms

Enable ArgyllCMS sensor

extra-print-profiles

Generate extra print profiles. Warning: significant build time and memory requirements.

x11-misc/copyq

notification

Build with native notification support (requires kde-frameworks/knotifications:5)

x11-misc/dunst

completions

Install shell completions (for bash, fish and zsh)

dunstify

Build dunstify (notify-send alternative)

xdg

Install xdg-utils for opening links with xdg-open

x11-misc/fbpager

xrender

Enable transparency support via x11-libs/libXrender

x11-misc/gammastep

geoclue

Control dependency on app-misc/geoclue

x11-misc/gmrun

xdg

Enable xdg spec for configuration and history files location

x11-misc/gpaste

gnome

Enable proper gnome support and enable gnome shell extension.

x11-misc/grsync

gtk3

Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2

x11-misc/i3blocks

contrib

Install contrib modules

x11-misc/i3status

filecaps

Linux capabilities library is required for i3status to be able to read net bandwidth

x11-misc/j4-dmenu-desktop

dmenu

Use x11-misc/dmenu as default. Disable to use a different implementation.

x11-misc/ktsuss

sudo

Use the sudo backend instead the su one

x11-misc/libinput-gestures

experimental

avoid producing zombie processes

x11-misc/lightdm

gtk

Pull in the gtk+ greeter

non-root

Use non-root user by default

x11-misc/light-locker

dpms

Turn on the display on screensaver deactivation.

screensaver

Lock the screen on screensaver activation.

x11-misc/mugshot

gnome

Add support for gnome-base/gnome-control-center

libreoffice

Add support for app-office/libreoffice and app-office/libreoffice-bin

webcam

Add support for setting a profile photo in media-video/cheese

x11-misc/openbox-menu

icons

Enable support for icons in menus

svg

Support SVG icons

x11-misc/picom

config-file

Enable config file support

doc

Build documentation and man pages (requires app-text/asciidoc)

drm

Enable support for using drm for vsync

opengl

Enable features that require opengl (opengl backend, and opengl vsync methods)

x11-misc/polybar

i3wm

Add support for i3 window manager

ipc

Add support for Inter-Process Messaging

mpd

Add support for Music Player Daemon

network

Enable network support

x11-misc/primus

libglvnd

Use media-libs/libglvnd for dispatch

x11-misc/py3status

minimal

Don't depend on x11-misc/i3status if you don't plan to use any of its built-in modules.

udev

Install extra requirement dev-python/pyudev to enable udev events monitoring on modules.

x11-misc/qterm

ssh

Enable SSH support (requires dev-libs/openssl

x11-misc/qtfm

dbus

Install the qtfm-tray removable device manager

shared

Install the libQtFM shared library and headers

x11-misc/read-edid

vbe-mode

Build get-edid with support for legacy, VBE-based interface. Requires dev-libs/libx86.

x11-misc/redshift

geoclue

Control dependency on app-misc/geoclue

x11-misc/rofi

drun

Enable desktop file run dialog

windowmode

Enable normal window mode

x11-misc/rss-glx

quesoglc

Enable support for OpenGL Character Renderer

x11-misc/sent

savedconfig

Without a saved config.h, this package depends on media-gfx/farbfeld for image conversions

x11-misc/spacefm

video-thumbnails

Support video thumbnails with media-video/ffmpegthumbnailer

x11-misc/stalonetray

graceful-exit

use non-portable hack to exit gracefully on signal

x11-misc/tint2

battery

Enable battery status plugin

sanitize

Enable ASAN

tint2conf

Build/Install tint2conf as well

x11-misc/urxvt-perls

deprecated

Install scripts which have been marked as deprecated by upstream

x11-misc/wbar

gtk

Enables the gtk-based wbar-config GUI

x11-misc/x11vnc

xdamage

Enable support for the Xdamage library

xfixes

Enable support for the Xfixes library

xrandr

Enable support for the X xrandr extension

x11-misc/xkbd

evdev

Enable dev-libs/libevdev support for xtg

xi

Enable XInput2 support through x11-libs/libXi

xrandr

Enable XRandR support through x11-libs/libXrandr

x11-misc/xkbset

tk

Install the dev-perl/Tk based xkbset-gui utility

x11-misc/xlockmore

vtlock

Enables support for virtual terminal locking

xlockrc

Enables xlockrc for people without PAM

x11-misc/xmobar

alsa

Use alsa-mixer to get the volume from soundcards.

datezone

Enables localized date support.

dbus

Publish a service on the session bus for controlling xmobar.

mpd

MPD support. Needs libmpd installed.

mpris

MPRIS v1, v2 support.

rtsopts

Use -with-rtsopts=-V0 to reduce wakeups.

timezone

Enables localized date support.

uvmeter

UVMeter only useful to australians.

weather

Enable weather plugin.

wifi

Wireless info support via nl80211. Required for the Wireless plugin on systems running Linux, the kernel.

xft

Use Xft to render text. UTF-8 support included.

xpm

Enable usage of xpm for icons.

xrender

Use XRender for alpha background pseudo-transparency.

x11-misc/xscreensaver

fonts

Install the fonts shipped with XScreenSaver that have clear licensing

gdm

Use gdmflexiserver from gnome-base/gdm instead of x11-misc/lightdm

gles

Emulate OpenGL 1.3 in terms of OpenGL ES 1.x

glx

Use GLX to interface OpenGL and X11 instead of EGL

locking

Compile in support for locking the display

logind-idle-hint

Send the session idle hint to logind once the screen saver blanks

new-login

Enable user switching support using gdmflexiserver (x11-misc/lightdm)

x11-misc/xsr

cursor

Capture mouse cursor using x11-misc/xdotool, and place them on the screenshots using media-gfx/imagemagick

x11-misc/yabar

playerctl

Uses media-sound/playerctl to retrieve the name of the currently played song

x11-plugins/bfm

gkrellm

Enable building of app-admin/gkrellmmodule

x11-plugins/e16-epplets

cdaudio

Enable CD Audio support using media-libs/libcdaudio

libgtop

Use gnome-base/libgtop to obtain system load information

x11-plugins/pidgin-mbpurple

twitgin

Enable graphical plugin for Gtk+ interface of Pidgin.

x11-plugins/pidgin-sipe

ocs2005-message-hack

Disable message timeout for OCS2005 clients which causes "false" not delivered error messages

openssl

Enable crypto support via dev-libs/openssl

telepathy

Support use as a telepathy backend

voice

Enable experimental voice/video support

x11-plugins/vicious

contrib

Install extra widgets, some for less common hardware, some contributed by Vicious users.

x11-plugins/wmbattery

apm

Add APM (Advanced Power Management) support

x11-plugins/wmfire

session

Enable session management

x11-plugins/wmudmount

gcr

Enable support for secure memory with app-crypt/gcr

x11-terms/aterm

background

Enable background image support via media-libs/libafterimage

xgetdefault

Enable resources via X instead of aterm small version

x11-terms/gnome-terminal

gnome-shell

Integrate with gnome-base/gnome-shell search

nautilus

Build gnome-base/nautilus extension

x11-terms/mlterm

brltty

Enable support for app-accessibility/brltty

fcitx

Enable support for app-i18n/fcitx

harfbuzz

Enable support for OpenType Layout (media-libs/harfbuzz)

ibus

Enable support for app-i18n/ibus

libssh2

Enable support for net-libs/libssh2

regis

Enable support for ReGIS

scim

Enable support for app-i18n/scim

skk

Enable support for SKK (virtual/skkserv or app-i18n/skk-jisyo)

uim

Enable support for app-i18n/uim

utempter

Enable support for sys-libs/libutempter

wayland

Enable support for Wayland

x11-terms/rxvt-unicode

24-bit-color

Enable 24-bit color support. Note that this feature is unofficial, may cause visual glitches due to the fact there is no termcap/terminfo definition for rxvt-unicode-24bit yet so it is necessary to use the one for 256 colours, visibly increases memory usage, and might slow urxvt down dramatically when more than six fonts are in use in a terminal instance.

256-color

Enable 256 color support

blink

Enable blinking text

fading-colors

Enable colors fading when off focus

font-styles

Enable support for bold and italic fonts

gdk-pixbuf

Enable transparency support using x11-libs/gdk-pixbuf

iso14755

Enable ISO-14755 support

mousewheel

Enable scrolling via mouse wheel or buttons 4 and 5

perl

Enable perl script support. You can still disable this at runtime with -pe ""

unicode3

Use 21 instead of 16 bits to represent unicode characters

wide-glyphs

Enable support for wide glyphs, required for certain symbol/icon fonts to display correctly. Note that this feature is *unofficial* and has been observed to cause stability issues for some users.

x11-terms/terminology

extras

Install additional testing tools

x11-terms/xfce4-terminal

utempter

Include utmp management support via sys-libs/libutempter

x11-terms/xterm

openpty

Use openpty() in preference to posix_openpt()

sixel

Enable sixel graphics support

toolbar

Enable the xterm toolbar to be built

x11-themes/arc-theme

cinnamon

Install theme for gnome-extra/cinnamon

gnome-shell

Install theme for gnome-base/gnome-shell

gtk2

Install GTK+2 theme

gtk3

Install GTK+3 theme

gtk4

Install GTK+4 theme

mate

Install Metacity theme for mate-base/mate

pre-rendered

Avoid media-gfx/inkscape and media-gfx/optipng dependencies by using pre-rendered PNGs

transparency

Enable transparency

xfce

Install theme for xfce-base/xfwm4

x11-themes/comix-xcursors

lefthanded

Install lefthanded version of theme in addition to default one.

opaque

Install non-transparent version of theme in addition to default one.

x11-themes/fluent-icon-theme

hardlink

Hardlink duplicate icons to greatly reduce installation size

round

Install the round version of symbolic icons

x11-themes/gentoo-artwork

grub

Install extra sys-boot/grub themes

icons

Install icons

lilo

Install extra sys-boot/lilo themes

pixmaps

Install pixmaps

x11-themes/gtk-engines-murrine

animation-rtl

Progressbar animation from right to left

themes

Pull in themes via x11-themes/murrine-themes

x11-themes/kfaenza

additional

Install additional KFaenza icons. See third homepage for details

x11-themes/QGnomePlatform

minimal

Skip kde-frameworks/qqc2-desktop-style dependency (Warning: some apps could be wrongly rendered)

x11-themes/tela-icon-theme

hardlink

Hardlink duplicate icons to greatly reduce installation size

x11-themes/vertex-theme

cinnamon

Install theme for gnome-extra/cinnamon

gnome-shell

Install theme for gnome-base/gnome-shell

mate

Install Metacity theme for mate-base/mate

xfce

Install theme for xfce-base/xfwm4

x11-themes/zuki-themes

gnome-shell

Install theme for gnome-base/gnome-shell

gtk2

Install GTK+2 theme

xfce

Install theme for xfce-base/xfwm4

x11-wm/ctwm

jpeg

Enable jpeg image support with virtual/jpeg

test

Enable upstream test suite, build required binary

xpm

Enable xpm icon support with x11-libs/libXpm

x11-wm/e16

debug

Build libtrip debugging library

dialogs

Enable support for configuration dialogs

libhack

Build libhack window mode helper library

modules

Enable support for loadable modules

no-container

Do not use container window (experimental)

pango

Enable pango font rendering using x11-libs/pango

player

Enable audio using aplay from media-sound/alsa-utils

poll

Use poll() event handler API (recommended)

select

Use select() event handler API

themes

Install the official E16 themes using x11-themes/e16-themes

xi2

Enable the experimental multipointer input XInput2. This incldues the MultiPointer X feature

xpresent

Enable support for the X Present extension via x11-libs/libXpresent (experimental)

xrandr

Enable support for the X RandR extension via x11-libs/libXrandr

xrender

Enable transparency support using the X Render extension via x11-libs/libXrender

xsm

Enable X Session Management support using x11-libs/libSM

xsync

Enable X Sync support

zoom

Support resolution change of current window (zoom) usingx11-libs/libXxf86vm (xvidtune)

x11-wm/echinus

xrandr

Enable support for multihead configuration

x11-wm/enlightenment

xwayland

Enable XWayland application support

x11-wm/fluxbox

slit

Enables the Fluxbox slit (or dock)

systray

Enables the system tray in the Fluxbox toolbar

toolbar

Enables the Fluxbox toolbar

x11-wm/fvwm

lock

Enable screen locking

netpbm

Enable NetPBM support (used by FvwmScript-ScreenDump)

stroke

Mouse Gesture support

x11-wm/fvwm3

go

Enable building dev-lang/go code (FvwmPrompt)

x11-wm/i3

doc

Build and install the HTML documentation and regenerate the man pages

x11-wm/icewm

gdk-pixbuf

Enable gdk-pixbuf rendering

x11-wm/jwm

pango

Bidirectional text layout support with pango using xft backend.

x11-wm/lumina

desktop-utils

Build and install lumina's desktop-utils

x11-wm/metacity

libcanberra

Enable sound event support using media-libs/libcanberra

vulkan

Enable Vulkan based compositor support via META_COMPOSITOR=vulkan environment variable

x11-wm/muffin

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

x11-wm/musca

apis

Optionally install the experimental `apis' window manager

xlisten

Optionally install the xlisten utility

x11-wm/mutter

elogind

Rely on sys-auth/elogind as logind provider for Wayland sessions

sysprof

Enable profiling data capture support using dev-util/sysprof-capture

x11-wm/notion

xrandr

Add support for xrandr

x11-wm/openbox

session

Enables support for session managers

xdg

Install the python xdg files for xdg autostart

x11-wm/pekwm

contrib

Install optional extras in the documentation directory

pango

Pango font support

themes

Install additional themes

x11-wm/ratpoison

history

Use sys-libs/readline for history handling

sloppy

Install sloppy, a focus-follows-mouse implementation for ratpoison

xrandr

Enable support for XRandR

x11-wm/stumpwm

doc

Include documentation

x11-wm/windowmaker

modelock

Enable XKB language status lock support. README says: "If you don't know what it is you probably don't need it."

xrandr

Enable XRandR window extension support

x11-wm/wmfs

imlib2

Enable image support through media-libs/imlib2

x11-wm/xmonad

no-autorepeat-keys

Allow ignoring of keyboard autorepeat.

x11-wm/xmonad-contrib

xft

Use Xft to render text

x11-wm/xpra

client

Build client-side code

clipboard

Enable clipboard support

csc

Enable csc softscaler support

gtk3

Enable the GTK3 client

html

Install the HTML5 client

ibus

Use ibus input method via app-i18n/ibus

mdns

Enable Multicast DNS via dev-libs/mdns

oauth

Enable OAuth2 authentication in the server

openh264

Enable H.264 support using media-libs/openh264

pinentry

Use app-crypt/pinentry for password entry

qrcode

Enable generating QRCodes for server URL via media-gfx/qrencode

server

Build server-side code

trayicon

Enable system tray icon

vpx

Enable vpx image format support

webcam

Enable webcam support via opencv

xdg

Enable support for XDG-based menus

xfce-base/libxfce4ui

glade

Build support for Glade 3's GtkBuilder implementation

system-info

Enable system information in xfce4-about.

xfce-base/thunar

trash-panel-plugin

Build the trash status indicator plugin for the XFCE panel

xfce-base/tumbler

epub

Enable support for .epub thumbnailer using app-text/libgepub

odf

Enable support for .odf thumbnailers by using gnome-extra/libgsf

xfce-base/xfce4-meta

archive

Install app-arch/xarchiver.

editor

Install the app-editors/mousepad text editor.

image

Install the media-gfx/ristretto image viewer.

media

Install the media-video/parole media player.

mpd

Install the media-sound/xfmpc MPD client.

remote-fs

Install the x11-misc/gigolo frontend to manage remote filesystem connections.

search

Install the dev-util/catfish search tool frontend.

xfce-base/xfce4-panel

dbusmenu

Enable dev-libs/libdbusmenu integration (in status notifier plugin)

xfce-base/xfce4-power-manager

panel-plugin

Build the power management plugin for the XFCE panel

xfce-base/xfce4-settings

libcanberra

Enable sound event support using media-libs/libcanberra

xklavier

Enable keyboard layout selection support using x11-libs/libxklavier

xfce-base/xfdesktop

thunar

Build support for desktop icons (for example, launchers and folders)

xfce-base/xfwm4

xpresent

Enable the XPresent extension for sync to vblank

xfce-extra/xfce4-clipman-plugin

qrcode

Enable support for media-gfx/qrencode

xfce-extra/xfce4-mixer

keybinder

Enable support for global hotkeys using dev-libs/keybinder.

sndio

Enable media-sound/sndio backend.

xfce-extra/xfce4-pulseaudio-plugin

keybinder

Enable support for global hotkeys using dev-libs/keybinder.

libcanberra

Enable sound event support using media-libs/libcanberra

libxfce4windowing

Enable experimental support for raising media player windows using xfce-base/libxfce4windowing.

wnck

Enable experimental support for raising media player windows using x11-libs/libwnck.

USE flags

acct-user/apache

icingaweb2

mgraph

acct-user/git

gitea

gitolite

acct-user/nginx

icingaweb2

mgraph

acct-user/vdr

graphlcd

legacy-homedir

remote

serial

app-accessibility/at-spi2-core

dbus-broker

app-accessibility/brltty

api

beeper

fm

louis

midi

pcm

app-accessibility/emacspeak

espeak

app-accessibility/espeak-ng

async

klatt

l10n_ru

l10n_zh

man

mbrola

app-accessibility/flite

voices

app-accessibility/freetts

jsapi

mbrola

app-accessibility/orca

braille

app-accessibility/speech-dispatcher

espeak

flite

app-admin/clsync

apidoc

cgroups

clsync

cluster

control-socket

extra-debug

extra-hardened

gio

highload-locks

namespaces

socket-library

app-admin/conky

apcupsd

bundled-toluapp

cmus

colour-name-map

extras

ical

intel-backlight

iostats

irc

lua-cairo

lua-cairo-xlib

lua-imlib

lua-rsvg

math

moc

mouse-events

mpd

nvidia

portmon

thinkpad

webserver

xinput

xmms2

app-admin/conserver