https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86288
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- I think Jakub's patch does only allow __gnu__, using the same canonicalization for attribute-namespaces as for attributes.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86288
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- I think Jakub's patch does only allow __gnu__, using the same canonicalization for attribute-namespaces as for attributes.