[Bug preprocessor/114007] gcc chokes on __has_cpp_attribute(clang::unsafe_buffer_usage)

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114007

--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to fxcoud...@gmail.com from comment #19)
> I haven’t yet tested Xcode 13.3 myself, and have only followed the PRs from
> far away. Are there any issues (SDK, linker, or otherwise) that we need to
> report to Apple? Or that are already reported but we want taken more
> seriously?

Do they use [[clang::unsafe_buffer_usage]] then if __has_safe_buffers is
defined
even in -std=c11 etc. modes in the headers?
Even clang errors on [[clang::unsafe_buffer_usage]] with -std=c11
-pedantic-errors...
Though, guess not an issue for GCC itself, because if the parsing of
__has_cpp_attribute is fixed, then GCC definitely will not yield 1 for
clang::unsafe_buffer_usage attribute...