* Sandra Loosemore:
> @@ -13698,6 +13699,17 @@ Forward-declaring an incomplete enum type without an
> explicit
> underlying type is supported as an extension in all GNU C dialects,
> but is not supported at all in GNU C++.
>
> +@node Boolean Type
> +@subsection Support for the @code{_Bool} Type
> +@cindex boolean type
> +@cindex @code{_Bool} keyword
> +
> +The C99 standard added @code{_Bool} as a C language keyword naming the
> +boolean type. As an extension, GNU C also recognizes @code{_Bool} in
> +C90 mode as well as with @option{-std=c99} and later.
I think with C23, _Bool is again a GNU extension.
> +GNU C++ does not support the @code{_Bool} keyword.
Maybe mention that including <stdbool.h> defines _Bool as a macro?
