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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/114007] gcc chokes on __has_cpp_attribute(clang::unsafe_buffer_usage)
Date: Thu, 22 Feb 2024 10:31:23 +0000 [thread overview]
Message-ID: <bug-114007-4-dnPhfvVhtC@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-114007-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114007
--- Comment #25 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> (In reply to fxcoudert@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?
they do AFAICS: their <sys/cdefs.h> has no provision for different C std
versions (except the obvious like not using restrict before C99).
The section in question is
#if __has_cpp_attribute(clang::unsafe_buffer_usage)
#define __has_safe_buffers 1
#define __unsafe_buffer_usage [[clang::unsafe_buffer_usage]]
#elif __has_attribute(unsafe_buffer_usage)
#define __has_safe_buffers 1
#define __unsafe_buffer_usage __attribute__((__unsafe_buffer_usage__))
#else
#define __has_safe_buffers 0
#define __unsafe_buffer_usage
#endif
with a long comment explaining the use with clang -Wunsafe-buffer-usage.
next prev parent reply other threads:[~2024-02-22 10:31 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-20 9:01 [Bug preprocessor/114007] New: " ro at gcc dot gnu.org
2024-02-20 9:02 ` [Bug preprocessor/114007] " ro at gcc dot gnu.org
2024-02-20 9:09 ` iains at gcc dot gnu.org
2024-02-20 9:11 ` ro at CeBiTec dot Uni-Bielefeld.DE
2024-02-20 9:17 ` jakub at gcc dot gnu.org
2024-02-20 9:22 ` jakub at gcc dot gnu.org
2024-02-20 9:29 ` iains at gcc dot gnu.org
2024-02-20 9:31 ` iains at gcc dot gnu.org
2024-02-20 9:35 ` jakub at gcc dot gnu.org
2024-02-20 9:43 ` jakub at gcc dot gnu.org
2024-02-20 9:44 ` jakub at gcc dot gnu.org
2024-02-20 10:01 ` iains at gcc dot gnu.org
2024-02-20 10:12 ` iains at gcc dot gnu.org
2024-02-20 12:04 ` iains at gcc dot gnu.org
2024-02-21 13:58 ` jakub at gcc dot gnu.org
2024-02-21 14:15 ` rsandifo at gcc dot gnu.org
2024-02-21 14:26 ` jakub at gcc dot gnu.org
2024-02-21 17:04 ` jsm28 at gcc dot gnu.org
2024-02-21 18:29 ` jakub at gcc dot gnu.org
2024-02-22 8:48 ` ro at CeBiTec dot Uni-Bielefeld.DE
2024-02-22 9:45 ` fxcoudert at gmail dot com
2024-02-22 9:45 ` fxcoudert at gmail dot com
2024-02-22 9:50 ` ro at CeBiTec dot Uni-Bielefeld.DE
2024-02-22 9:52 ` iains at gcc dot gnu.org
2024-02-22 9:58 ` ro at CeBiTec dot Uni-Bielefeld.DE
2024-02-22 10:22 ` jakub at gcc dot gnu.org
2024-02-22 10:31 ` ro at CeBiTec dot Uni-Bielefeld.DE [this message]
2024-02-22 10:34 ` iains at gcc dot gnu.org
2024-02-22 18:33 ` cvs-commit at gcc dot gnu.org
2024-02-22 18:34 ` jakub at gcc dot gnu.org
2024-03-02 0:39 ` cvs-commit at gcc dot gnu.org
2024-03-04 12:10 ` jakub at gcc dot gnu.org
2024-06-11 10:37 ` cvs-commit at gcc dot gnu.org
2024-06-11 10:50 ` jakub at gcc dot gnu.org
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