https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63610
--- Comment #15 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> --- (In reply to howarth from comment #14) > You aren't seeing regressions because you're not setting > MACOSX_DEPLOYMENT_TARGET during the gcc build. Oh, so that's it! Thanks for puzzling it out. I'll ask RM for permission to backport to all active branches (4.8 and 4.9). Before I do that, can you confirm that the patch works as you expect on trunk, with MACOSX_DEPLOYMENT_TARGET set? Just to be extra sure.