Received: from malur.postgresql.org ([2a02:16a8:dc51::56])
	by arkaria.postgresql.org with esmtps
 (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256)
	(Exim 4.89)
	(envelope-from <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1forgH-0003aP-JM
	for pgsql-hackers@arkaria.postgresql.org; Sun, 12 Aug 2018 14:49:21 +0000
Received: from localhost ([127.0.0.1] helo=malur.postgresql.org)
	by malur.postgresql.org with esmtp (Exim 4.89)
	(envelope-from <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1forgF-0003DH-08
	for pgsql-hackers@arkaria.postgresql.org; Sun, 12 Aug 2018 14:49:19 +0000
Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29])
	by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256)
	(Exim 4.89)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1forgE-0003DA-PW
	for pgsql-hackers@lists.postgresql.org; Sun, 12 Aug 2018 14:49:18 +0000
Received: from sss.pgh.pa.us ([66.207.139.130])
	by magus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256)
	(Exim 4.89)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1forg5-0007o3-EW
	for pgsql-hackers@lists.postgresql.org; Sun, 12 Aug 2018 14:49:18 +0000
Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1])
	by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id w7CEn3lw016480;
	Sun, 12 Aug 2018 10:49:03 -0400
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Fabien COELHO <coelho@cri.ensmp.fr>
cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: Allowing printf("%m") only where it actually works
In-reply-to: <alpine.DEB.2.21.1808120916590.6189@lancre>
References: <20180528150125.j2x3mp62ssbeg3h5@alvherre.pgsql>
 <2685.1527520461@sss.pgh.pa.us> <8770.1533931511@sss.pgh.pa.us>
 <16896.1533935042@sss.pgh.pa.us> <14925.1534040609@sss.pgh.pa.us>
 <alpine.DEB.2.21.1808120916590.6189@lancre>
Comments: In-reply-to Fabien COELHO <coelho@cri.ensmp.fr>
	message dated "Sun, 12 Aug 2018 09:27:31 +0200"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <16478.1534085343.1@sss.pgh.pa.us>
Date: Sun, 12 Aug 2018 10:49:03 -0400
Message-ID: <16479.1534085343@sss.pgh.pa.us>
List-Id: <pgsql-hackers.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-hackers@lists.postgresql.org>
List-Owner: <mailto:pgsql-hackers-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-hackers>
Precedence: bulk

Fabien COELHO <coelho@cri.ensmp.fr> writes:
> Indeed, there are hundreds of warnings around "pg_printf_attribute_m" 
> added with gcc 7.3.0 on by ubuntu 18.04 laptop, thanks to 3a60c8ff.

Oh?  What warnings exactly?  I would not expect any new warnings except
on platforms where gcc believes the local printf is non POSIX compliant,
which certainly ought not happen on any non-obsolete Linux.

			regards, tom lane