https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100903
Marc Mutz <marc.mutz at hotmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |marc.mutz at hotmail dot com --- Comment #7 from Marc Mutz <marc.mutz at hotmail dot com> --- In Qt, we still only require C++17, but we want to write our relational operators as-if we already had C++20 and use macros to paper over the difference. This requires us to write our own C++17 versions of std::_*ordering (called Qt:*_ordering). Whatever you do to fix the issue, please don't only fix it for libstdc++, but also for user code.