[Bug c++/127081] Within std::format, constexpr expansion of std::basic_format_string errors with: strong_ordering is not a member of 'std'

[sebj_coder3 at pm dot me via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127081

--- Comment #2 from Seb James <sebj_coder3 at pm dot me> ---
It was indeed the very next error I encountered after pulling down the patch in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124888#c14!