https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82825
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- So, the first question is what kind of system support this needs, when it changed in between darwin11 and darwin17. As the macro is guarded with #ifndef, I suppose we could override it from configure for affected darwin versions through DEFS.
