https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70793
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- This has been broken since GCC added support non-class-key friends for C++11 which was added in 4.7.1.
pinskia at gcc dot gnu.org via Gcc-bugs Fri, 06 Aug 2021 21:11:33 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70793
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- This has been broken since GCC added support non-class-key friends for C++11 which was added in 4.7.1.