http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54694
--- Comment #6 from Toralf Förster <toralf.foerster at gmx dot de> 2013-01-03 19:35:16 UTC --- As long as no fixed gcc version is released - in Gentoo land we do have this work around for now : https://bugs.gentoo.org/show_bug.cgi?id=434908#c11 (Workaround: Append -mno-avx to CFLAGS.)