[Bug libstdc++/114153] std::less<> prefers operator const void*() over operator<=>() in C++20 mode

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114153

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 57577
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57577&action=edit
Check for <=>

Something like this (but it's also needed for std::greater and std::less_equal)