The file in source xbmc/lib/libsquish/Makefile.in contains a -msse2 flag that makes compiling to fail later on some textures.xbt Unfortunately I don't have my logs here as I am on a mac, but in this page of this thread (is not gentoo but from Arch Linux) is a log of someone and below the solution (patch that file so it reads " -DSQUISH_USE_SSE=1 -msse") http://bbs.archlinux.org/viewtopic.php?pid=638314 Reproducible: Always Steps to Reproduce: 1. Emerge media-tv/xbmc-9999 on a non-sse2 cpu like an old athlon xp.
should be fixed now http://sources.gentoo.org/media-tv/xbmc/xbmc-9999.ebuild?r1=1.37&r2=1.38
