Re: Fix for configure error in 9.5/9.6 on macOS 11.0 Big Sur

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>
Cc: Jesse Zhang <sbjesse(at)gmail(dot)com>, Thomas Gilligan <thomas(dot)gilligan(at)icloud(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Fix for configure error in 9.5/9.6 on macOS 11.0 Big Sur
Date: 2020-09-03 05:40:03
Message-ID: 558420.1599111603@sss.pgh.pa.us
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Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> writes:
> On 2020-09-02 22:43, Jesse Zhang wrote:
>> | conftest.c:184:3: error: implicitly declaring library function
>> 'exit' with type 'void (int) __attribute__((noreturn))'
>> [-Werror,-Wimplicit-function-declaration]

> Where did the -Werror come from?

Peter wasn't entirely explicit here, but note the advice at the end of

https://www.postgresql.org/docs/devel/install-procedure.html

that you cannot include -Werror in any CFLAGS you tell configure
to use. It'd be nice if autoconf was more robust about that,
but it is not our bug to fix.

regards, tom lane

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