https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88736
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords|accepts-invalid | See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=54249 Component|c++ |libstdc++ --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- GCC's gcc/ginclude/stddef.h has: #if defined(__cplusplus) && __cplusplus >= 201103L #ifndef _GXX_NULLPTR_T #define _GXX_NULLPTR_T typedef decltype(nullptr) nullptr_t; #endif #endif /* C++11. */ Which was added for PR 54249. It looks like it is still needed but I think could pull that into libstdc++/include/c_compatibility/stddef.h instead.