https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21609
--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> --- I will remove this extension completely for GCC 10.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21609
--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> --- I will remove this extension completely for GCC 10.