From: Sam James <sam@gentoo.org>
To: FX Coudert <fxcoudert@gmail.com>
Cc: gcc-patches <gcc-patches@gcc.gnu.org>,
Iain Sandoe <iain@sandoe.co.uk>,
dimitry@andric.com
Subject: Re: [PATCH] Include safe-ctype.h after C++ standard headers, to avoid over-poisoning
Date: Wed, 06 Mar 2024 13:54:11 +0000 [thread overview]
Message-ID: <878r2v1n5o.fsf@gentoo.org> (raw)
In-Reply-To: <E2F39630-BA4D-427C-93FA-C61751DACD19@gmail.com> (FX Coudert's message of "Wed, 6 Mar 2024 14:42:12 +0100")
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FX Coudert <fxcoudert@gmail.com> writes:
> I would like to patch this patch from September 2023:
> https://gcc.gnu.org/pipermail/gcc-patches/2023-September/631611.html
>
> This bug is now hitting macOS in the latest version of Xcode (it was originally seen on freebsd).
> I confirm that the patch is restoring bootstrap on x86_64-apple-darwin23
Iain hit an issue with it and I never got a chance to look into how to
fix it.
>
> OK to push?
> FX
>
>
>
>
>
>> Ref: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111632
>>
>> When building gcc's C++ sources against recent libc++, the poisoning of
>> the ctype macros due to including safe-ctype.h before including C++
>> standard headers such as <list>, <map>, etc, causes many compilation
>> errors, similar to:
>>
>> In file included from /home/dim/src/gcc/master/gcc/gensupport.cc:23:
>> In file included from /home/dim/src/gcc/master/gcc/system.h:233:
>> In file included from /usr/include/c++/v1/vector:321:
>> In file included from
>> /usr/include/c++/v1/__format/formatter_bool.h:20:
>> In file included from
>> /usr/include/c++/v1/__format/formatter_integral.h:32:
>> In file included from /usr/include/c++/v1/locale:202:
>> /usr/include/c++/v1/__locale:546:5: error: '__abi_tag__' attribute
>> only applies to structs, variables, functions, and namespaces
>> 546 | _LIBCPP_INLINE_VISIBILITY
>> | ^
>> /usr/include/c++/v1/__config:813:37: note: expanded from macro
>> '_LIBCPP_INLINE_VISIBILITY'
>> 813 | # define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI
>> | ^
>> /usr/include/c++/v1/__config:792:26: note: expanded from macro
>> '_LIBCPP_HIDE_FROM_ABI'
>> 792 |
>> __attribute__((__abi_tag__(_LIBCPP_TOSTRING(
>> _LIBCPP_VERSIONED_IDENTIFIER))))
>> | ^
>> In file included from /home/dim/src/gcc/master/gcc/gensupport.cc:23:
>> In file included from /home/dim/src/gcc/master/gcc/system.h:233:
>> In file included from /usr/include/c++/v1/vector:321:
>> In file included from
>> /usr/include/c++/v1/__format/formatter_bool.h:20:
>> In file included from
>> /usr/include/c++/v1/__format/formatter_integral.h:32:
>> In file included from /usr/include/c++/v1/locale:202:
>> /usr/include/c++/v1/__locale:547:37: error: expected ';' at end of
>> declaration list
>> 547 | char_type toupper(char_type __c) const
>> | ^
>> /usr/include/c++/v1/__locale:553:48: error: too many arguments
>> provided to function-like macro invocation
>> 553 | const char_type* toupper(char_type* __low, const
>> char_type* __high) const
>> | ^
>> /home/dim/src/gcc/master/gcc/../include/safe-ctype.h:146:9: note:
>> macro 'toupper' defined here
>> 146 | #define toupper(c) do_not_use_toupper_with_safe_ctype
>> | ^
>>
>> This is because libc++ uses different transitive includes than
>> libstdc++, and some of those transitive includes pull in various ctype
>> declarations (typically via <locale>).
>>
>> There was already a special case for including <string> before
>> safe-ctype.h, so move the rest of the C++ standard header includes to
>> the same location, to fix the problem.
>>
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next prev parent reply other threads:[~2024-03-06 13:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-06 13:42 FX Coudert
2024-03-06 13:54 ` Sam James [this message]
2024-03-06 14:35 ` Iain Sandoe
2024-03-06 14:57 ` FX Coudert
2024-03-06 23:02 ` Dimitry Andric
2024-03-07 7:11 ` Iain Sandoe
2024-03-07 9:51 ` Richard Biener
2024-03-07 13:40 ` FX Coudert
2024-04-03 9:01 ` Iain Sandoe
2024-04-03 9:38 ` Richard Biener
-- strict thread matches above, loose matches on Subject: below --
2023-09-28 16:37 Dimitry Andric
2024-01-30 16:19 ` Jonathan Wakely
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