https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58601 Bug 58601 depends on bug 64987, which changed state.
Bug 64987 Summary: alignas(N) (and __attribute__(__aligned__(N))) ignored on enum specifiers https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64987 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED