https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88339
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- Created attachment 46876 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46876&action=edit Partial implementation of <compare> This patch adds an incomplete and untested <compare> header. This depends on my implementation of the <concepts> header, which I'll be committing to the concepts-cxx2a branch soon.