https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60304
--- Comment #19 from Manuel López-Ibáñez <manu at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #18) > I assume that testcase is meant to be C++ (because it isn't valid C) but > it's not valid C++ either: > > 17.6.4.3.1 [macro.names] > "A translation unit that includes a header shall not contain any macros that > define names declared or defined in that header. Nor shall such a > translation unit define macros for names lexically identical to keywords." This is exactly what G++'s stdbool.h is doing with -std=gnu++98 and -std=c++98. (Also, why is this not an error with -std=c++11 -pedantic-errors?)
