Created attachment 469958 [details] emerge --info '=games-fps/quake3-9999::gentoo' ioquake3 from git now uses libsdl2, not libsdl-1. the build works perfectly if libsdl2 is present.
Created attachment 469960 [details] emerge -pqv '=games-fps/quake3-9999::gentoo'
Created attachment 469962 [details] /var/log/portage/games-fps:quake3-9999:20170413-142122.log
Package was removed from Gentoo ebuild repo in commit 9e2a01c4881b67200d0a43ab7d6f147d6e5ac2aa.