Add support for extended attributes (filesystem-stored metadata)

Packages describing “xattr” as local USE flag

Package“xattr” Flag Description
app-backup/snapperAdd support for getting and setting POSIX extended attributes, through sys-apps/attr.
app-emulation/qemuAdd support for getting and setting POSIX extended attributes, through sys-apps/attr. Requisite for the virtfs backend.
sys-apps/portagePreserve extended attributes (filesystem-stored metadata) when installing files. Usually only required for hardened systems.

All packages providing a “xattr” USE flag (28)