http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51031
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-11-09 13:49:18 UTC --- > I think that configure should check that the "as" supports avx independently > of > the architecture one is building on or for. I don't think the failure in comment #2 has anything to do with avx: it is due to pseudo-op (elf ones according rth on IRC) and I see it on x86_64-darwin10 as well (AFAIK gcc is tune for Core2). Note that I am now bootstrapping with --- /opt/gcc/_clean/libitm/configure.tgt 2011-11-08 20:06:30.000000000 +0100 +++ /opt/gcc/work/libitm/configure.tgt 2011-11-09 00:42:05.000000000 +0100 @@ -94,6 +94,7 @@ case "${target}" in | *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \ | *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \ | *-*-darwin* | *-*-aix*) + UNSUPPORTED=1 # POSIX system. The OS is supported. ;;