Re: pg_attribute_noreturn(), MSVC, C11

From: Peter Eisentraut <peter(at)eisentraut(dot)org>
To: pgsql-hackers(at)postgresql(dot)org
Cc: Andres Freund <andres(at)anarazel(dot)de>, Dagfinn Ilmari Mannsåker <ilmari(at)ilmari(dot)org>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
Subject: Re: pg_attribute_noreturn(), MSVC, C11
Date: 2025-03-10 12:27:07
Message-ID: 47f33031-0704-45f9-a0eb-650c0d7f4a3a@eisentraut.org
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On 13.02.25 16:34, Peter Eisentraut wrote:
> On 22.01.25 19:16, Peter Eisentraut wrote:
>> On 06.01.25 15:52, Peter Eisentraut wrote:
>>> On 03.01.25 21:51, Dagfinn Ilmari Mannsåker wrote:
>>>> Peter Eisentraut <peter(at)eisentraut(dot)org> writes:
>>>>
>>>>> I suggest we define pg_noreturn as
>>>>>
>>>>> 1. If C11 is supported, then _Noreturn, else
>>>>> 2. If GCC-compatible, then __attribute__((noreturn)), else
>>>>
>>>> Would it be worth also checking __has_attribute(noreturn)?  Or do all
>>>> compilers that have __attribute__((noreturn)) claim to be GCC?
>>>
>>> I don't think that would expand the set of supported compilers in a
>>> significant way.  We can always add it if we find one, of course.
>>
>> In fact, as another thought, we could even drop #2.  Among the GCC-
>> compatible compilers, both GCC and Clang have supported #1 for ages,
>> and the only other candidate I could find on the build farm is the
>> Solaris compiler, which also supports C11 by default, per its
>> documentation.
>>
>>>>> 3. If MSVC, then __declspec((noreturn))
>
> Here is an updated patch set that contains the above small change and
> fixes some conflicts that have arisen in the meantime.

Another rebased patch set, no further changes.

Attachment Content-Type Size
v3-0001-pg_noreturn-to-replace-pg_attribute_noreturn.patch text/plain 45.2 KB
v3-0002-Add-another-pg_noreturn.patch text/plain 1.5 KB
v3-0003-Swap-order-of-extern-static-and-pg_nodiscard.patch text/plain 9.9 KB
v3-0004-Support-pg_nodiscard-on-non-GNU-compilers-that-su.patch text/plain 2.0 KB

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