https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79346
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to Eric Gallager from comment #2) > Confirmed, although it's pretty easy to work around, just write: > > #if defined(__STDC_VERSION__) && __STDC_VERSION__ < 199901L > #endif > > instead. Ah, upon revisiting, I see this was already addressed in the gcc-help thread linked, so never mind then.