https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |iains at gcc dot gnu.org --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- This looks like a darwin header issue - _Atomic isn't supported in C++. Eventually this can be fixed by fix-including or by some hack in system.h (knowing full contents of ucred.h).