https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 102012, which changed state.
Bug 102012 Summary: GCC accepts any non-bool atomic constraint type https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102012 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |INVALID