http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54692
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-09-24 14:39:30 UTC --- Guess *) CFLAGS=`echo $CFLAGS | sed "s/-O[[s0-9]]* *//" ` CXXFLAGS=`echo $CXXFLAGS | sed "s/-O[[s0-9]]* *//" ` ;; needs to be now -O[[s0-9gf]] instead (also for -Ofast). That said, I don't see how it is related to using STAGE1_CFLAGS (note missing XX).