http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46914
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-01-27 15:06:17 UTC --- as requested in the bug reporting guidelines, please provide the output of 'gcc -v' (not just gcc --version) so we can see how your compiler was configured I know the Debian gcc packages default to -march=i486 but I don't know about Ubuntu
