https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83077
--- Comment #14 from François Dumont <fdumont at gcc dot gnu.org> --- Good news then. On my side I only had some failures due to a faulty friend declaration in gnu-versioned-namespace mode in <format> for which I've submitted a patch: https://gcc.gnu.org/pipermail/libstdc++/2023-August/056560.html
