https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114869
Joseph S. Myers <jsm28 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Known to work| |15.0 Summary|[13/14/15 Regression] GCC |[13/14 Regression] GCC says |says nullptr_t is a C built |nullptr_t is a C built in |in but it should be in |but it should be in |<stddef.h> |<stddef.h> --- Comment #4 from Joseph S. Myers <jsm28 at gcc dot gnu.org> --- Fixed so far for GCC 15. Although this could be backported, there would be a risk of breaking any (incorrect) code that's relying on this built-in typedef (especially in C23 mode).