Version 4.07 is available upstream. Please consider updating! It seems that version 4.07 is available upstream, while the latest version in the Gentoo tree is 3.8.4-r1. You think this warning is false? Read more about it here.
The cdsclient package is a set of C and csh routines which can be
built on Unix stations or PCs running Linux, which once compiled allow
to query some databases located at Centre de Donnees astronomiques
de Strasbourg (CDS) or on mirrors over the network.