This packages installs also static libs ".a" please provide do add relative USE. TIA /usr/lib/libUsageEnvironment.a /usr/lib/libliveMedia.a /usr/lib/libBasicUsageEnvironment.a /usr/lib/libgroupsock.a /usr/lib/libUsageEnvironment.so.3 /usr/lib/libliveMedia.so.3 /usr/lib/libBasicUsageEnvironment.so.3 /usr/lib/libgroupsock.so.3 /usr/lib/libgroupsock.so /usr/lib/libBasicUsageEnvironment.so /usr/lib/libliveMedia.so /usr/lib/libUsageEnvironment.so
See also: https://projects.gentoo.org/qa/policy-guide/installed-files.html#pg0302
I think this was fixed in https://gitweb.gentoo.org/repo/gentoo.git/commit/media-plugins/live?id=8c293c2d398dbbe110b67473cc43835a43873c8c (bump to 2020.03.06). All of the static stuff was ripped out, and on my machine: /usr/lib64/libUsageEnvironment.9.so /usr/lib64/libgroupsock.9.so /usr/lib64/libliveMedia.9.so /usr/lib64/libBasicUsageEnvironment.9.so /usr/bin/live555MediaServer /usr/bin/live555ProxyServer is all that's installed.