http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47247
--- Comment #28 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-10 07:35:02 UTC --- I believe binutils 2.21.1 is not new enough, support for this was only added on the 2.22 branch.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47247
--- Comment #28 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-10 07:35:02 UTC --- I believe binutils 2.21.1 is not new enough, support for this was only added on the 2.22 branch.