http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56182
--- Comment #6 from Mike Frysinger <vapier at gentoo dot org> 2013-02-05 05:37:08 UTC --- (In reply to comment #4) yes, the Gentoo build has to undo all the magic checks that gcc adds in a naïve attempt to find the right multilib which makes it too fragile to be useful seems adding yet another magic check broke the sed i use in Gentoo so i have to update it to strip out the additional cruft