http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46704
--- Comment #13 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-01-12 07:47:09 UTC --- > It looks like the fix came after the first gcc was built, so I should rebuild > it with Jan 9 snapshot using --disable-bootstrap, install it, and then rebuild > it again with disable snapshot? Yes, the problem is in the build compiler, not in the to-be-built compiler. I'd suggest selecting a good compiler as build compiler (preferably a released one) and sticking to it, the mainline is too moving a target for this.