Re: pgsql: Make typeof and typeof_unqual fallback definitions work on C++11

From: Peter Eisentraut <peter(at)eisentraut(dot)org>
To: Melanie Plageman <melanieplageman(at)gmail(dot)com>
Cc: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: Re: pgsql: Make typeof and typeof_unqual fallback definitions work on C++11
Date: 2026-03-15 20:52:09
Message-ID: 250c096f-f762-43d5-a05c-5d017dd6affa@eisentraut.org
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On 15.03.26 16:28, Melanie Plageman wrote:
> On Sun, Mar 15, 2026 at 2:48 AM Peter Eisentraut <peter(at)eisentraut(dot)org> wrote:
>>
>> Make typeof and typeof_unqual fallback definitions work on C++11
>>
>> These macros were unintentionally using C++14 features. This replaces
>> them with valid C++11 code.
>
> Seems like this broke at least canebrake [1]
>
> /home/bf/bf-build/canebrake/HEAD/pgsql.build/../pgsql/src/backend/bootstrap/bootstrap.c:1150:3:
> error: call to undeclared function '__typeof_unqual__'; ISO C99 and
> later do not support implicit function declarations
> [-Wimplicit-function-declaration]
> /home/bf/bf-build/canebrake/HEAD/pgsql.build/../pgsql/src/backend/bootstrap/bootstrap.c:1150:3:
> error: expected expression

Please see discussion here:
https://www.postgresql.org/message-id/ff129805-1516-478a-a438-145880165c58%40eisentraut.org

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