[Bug libstdc++/88339] Implement P0515R3, C++20 three-way comparison operator support <compare>.

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88339

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |10.0

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Implemented for GCC 10.