https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105719
--- Comment #4 from Iain Sandoe <iains at gcc dot gnu.org> --- Created attachment 55084 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55084&action=edit Implement the use of fixed framework headers this was a proof-of-principle exercise while looking into issues caused by implementing __has_feature () [PR60512]. This does not have any of the mechanism to *create* or *install* the fixed headers (for my testing I just built a CoreFoundation.framework/Headers/CFBase.h and edited bye hand to fix the problems found). So, still plenty to do ;)