http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53113
--- Comment #21 from Ryan Hill <dirtyepic at gentoo dot org> --- Well in practice we've had to have users build GCC with -mno-avx on no less than three occasions since 4.4 due to compiler bugs on certain chips (usually newer chips + old releases), so it'd be nice to have it just work. If x86_avx.cc must be compiled with -mavx then can it be appended after user CFLAGS? That should make everyone happy.
