https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107947
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Yes it is supported with -std=gnu99. The bug is in tzdata where it does: static [[noreturn]] void f(); That is invalid, the attribute cannot be in the middle of a declaration specification rather it should be before or after.