https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117210
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> --- Yes, looks likely. I suspect the problem with Jakub's commit is that it requires __LONG_LONG_SUPPORTED and __ISO_C_VISIBLE to have been defined before os_defines.h is included The original (broken) code was supposed to delay evaluation of those macros until _GLIBCXX_USE_C99_LONG_LONG_DYNAMIC was evaluated.