https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103305
--- Comment #19 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #17) > If the newlib change is still desirable, it would be nice if it was > conditional on the __GNUC__ version, so old versions of GCC can still be > built. Maybe just do this in <ctype.h>: Or this, to limit it to just C++: --- a/newlib/libc/include/ctype.h +++ b/newlib/libc/include/ctype.h @@ -181,6 +181,13 @@ __locale_ctype_ptr_l(locale_t _l) #endif /* !__cplusplus */ +#if defined(__GNUC__) && defined(__cplusplus) +# if __GNUC__ < 12 +/* Libstdc++ uses _U, _L etc. */ +# include <ctype_.h> +# endif +#endif + _END_STD_C #endif /* _CTYPE_H_ */
