http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52297
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-02-20 13:22:36 UTC --- The tests pass on powerpc-apple-darwin9 and x86_64-apple-darwin10, but not on i686-pc-linux-gnu; so x86_64-*-* does not seem the right target descriptor.