http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33637
--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-23 16:27:40 UTC --- Actually, the gcc/configure.ac hunks are needed too (just tested on x86_64-linux with a hack which added the (ignored) -X32_64 to extra_nmflags_for_target in toplevel configure{,.ac}). Which in the end means that the http://overlays.gentoo.org/proj/alt/export/51702/trunk/prefix-overlay/sys-devel/gcc/files/4.3.0/targettools-checks.patch patch is correct and should be applied. Michael, can you please write a ChangeLog entry for it and mail to gcc-patc...@gcc.gnu.org ?