http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54926
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-11 11:41:04 UTC --- Created attachment 28926 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28926 gcc48-pr54926.patch Richard discovered that adding it unconditionally doesn't work with system compilers, either too old g++'s or perhaps other vendor compilers. Untested fix attached.