https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103687
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Yet another option would be a new dg- directive (ideally something usable in effective target expressions) that would invoke (ideally remote) LC_ALL=$second_arg locale -k $first_arg and try to match it against the third argument (regex). So one could verify the assumptions the test is making, [dg-locale-test LC_TIME "en_HK" "^t_fmt=\"%I:%M:%S %p %Z\""] or so.
