https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121931
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Here are the ones allowed on globals by clang: https://github.com/llvm/llvm-project/blob/bac9e463b1f77b7354fe68c87d58be67e3294806/clang/lib/Sema/SemaDeclAttr.cpp#L6328 address, hwaddress and memtag.
