https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94960
--- Comment #12 from Sam James <sjames at gcc dot gnu.org> --- (In reply to Jason Merrill from comment #11) > Could we just add 'inline' to the functions that are 'constexpr' in later > standards? Apologies if I'm missing something, but see PR93008 if not aware.