pgsql: Remove configure probe for shm_open.

From: Thomas Munro <tmunro(at)postgresql(dot)org>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: Remove configure probe for shm_open.
Date: 2022-08-04 21:59:42
Message-ID: E1oJisX-000Kmi-UO@gemulon.postgresql.org
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Remove configure probe for shm_open.

shm_open() is in SUSv2 and all targeted Unix systems have it.

We retain a HAVE_SHM_OPEN macro, because it's clearer to readers than
something like !defined(WIN32).

Reviewed-by: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Reviewed-by: Andres Freund <andres(at)anarazel(dot)de>
Discussion: https://postgr.es/m/CA+hUKGJ3LHeP9w5Fgzdr4G8AnEtJ=z=p6hGDEm4qYGEUX5B6fQ@mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/098f4d813b69b4f88943afa777ae4bba5166f803

Modified Files
--------------
configure | 2 +-
configure.ac | 1 -
src/include/pg_config.h.in | 3 ---
src/include/port.h | 1 +
src/tools/msvc/Solution.pm | 1 -
5 files changed, 2 insertions(+), 6 deletions(-)

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