Return-Path: <five9a2@gmail.com>
X-Original-To: notmuch@notmuchmail.org
Delivered-To: notmuch@notmuchmail.org
Received: from localhost (localhost [127.0.0.1])
	by olra.theworths.org (Postfix) with ESMTP id EAFA1431FBC
	for <notmuch@notmuchmail.org>; Mon, 23 Nov 2009 08:38:13 -0800 (PST)
X-Virus-Scanned: Debian amavisd-new at olra.theworths.org
Received: from olra.theworths.org ([127.0.0.1])
	by localhost (olra.theworths.org [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id IX4hPSHqf4e7 for <notmuch@notmuchmail.org>;
	Mon, 23 Nov 2009 08:38:13 -0800 (PST)
Received: from mail-bw0-f210.google.com (mail-bw0-f210.google.com
	[209.85.218.210])
	by olra.theworths.org (Postfix) with ESMTP id DFCEE431FAE
	for <notmuch@notmuchmail.org>; Mon, 23 Nov 2009 08:38:12 -0800 (PST)
Received: by bwz2 with SMTP id 2so5423356bwz.0
	for <notmuch@notmuchmail.org>; Mon, 23 Nov 2009 08:38:11 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:received:received:sender:from:to:cc:subject
	:in-reply-to:references:date:message-id:mime-version:content-type;
	bh=FXeE7CZm+UTeuS7f2Xr5DoBGPii4HTRC7UzEGOXYdls=;
	b=IjRfNRMUx6rMkiMZm1orV4kUn/seFyZLSjtz7/7RCtaRKRV2mASJYwuuhPg8NgLSkH
	9nlpac00qGxx24eDCxFXdmuovvR/OYv1mr07hvf9kIFkUhFVLFAWT0Ug8Oct9NR1NVCF
	6hFJxNknhUZ5npqMILzBEfdOmzFy5n3F6esoQ=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=sender:from:to:cc:subject:in-reply-to:references:date:message-id
	:mime-version:content-type;
	b=VaeAlQFCxG+1ss8h7b7uYbCwkYzDVrVo/JZmq5X9MyRQTWcPvfAA+KMIeUIe6NjTsH
	oLdc9A79sA7HEZjuWZCiZpfLQfMdy8BnmqyCkWfeeOiEU0gDvTF5QuVt5SZRDbK/GhwY
	Tns5YAc13ghEzIkieF4SEY2LLysnUNvIm7iRA=
Received: by 10.204.152.151 with SMTP id g23mr582265bkw.148.1258994291779;
	Mon, 23 Nov 2009 08:38:11 -0800 (PST)
Received: from kunyang (vawpc43.ethz.ch [129.132.59.11])
	by mx.google.com with ESMTPS id 22sm5937992fkr.27.2009.11.23.08.38.10
	(version=TLSv1/SSLv3 cipher=RC4-MD5);
	Mon, 23 Nov 2009 08:38:10 -0800 (PST)
Sender: Jed Brown <five9a2@gmail.com>
From: Jed Brown <jed@59A2.org>
To: Dirk-Jan Binnema <djcb.bulk@gmail.com>, Jed Brown <jed@59a2.org>
In-Reply-To: <1873022c0911230814y783f14ffn23f12d13c73e5acc@mail.gmail.com>
References: <87skc5yd6v.wl%djcb@djcbsoftware.nl>
	<b8197bcb0911222334v26e96890t3632369ff32ff80f@mail.gmail.com>
	<1873022c0911230311o77e55fdqa5464a2dd16ec265@mail.gmail.com>
	<b8197bcb0911230519l4edf1b72w26d993834f25a417@mail.gmail.com>
	<87ws1h48up.fsf@59A2.org>
	<1873022c0911230814y783f14ffn23f12d13c73e5acc@mail.gmail.com>
Date: Mon, 23 Nov 2009 17:38:42 +0100
Message-ID: <87skc542nh.fsf@59A2.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: "notmuch@notmuchmail org" <notmuch@notmuchmail.org>, djcb@djcbsoftware.nl
Subject: Re: [notmuch] [PATCH 1/2] * avoid gcc 4.4.1 compiler warnings due
 to ignored write return values
X-BeenThere: notmuch@notmuchmail.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: "Use and development of the notmuch mail system."
	<notmuch.notmuchmail.org>
List-Unsubscribe: <http://notmuchmail.org/mailman/options/notmuch>,
	<mailto:notmuch-request@notmuchmail.org?subject=unsubscribe>
List-Archive: <http://notmuchmail.org/pipermail/notmuch>
List-Post: <mailto:notmuch@notmuchmail.org>
List-Help: <mailto:notmuch-request@notmuchmail.org?subject=help>
List-Subscribe: <http://notmuchmail.org/mailman/listinfo/notmuch>,
	<mailto:notmuch-request@notmuchmail.org?subject=subscribe>
X-List-Received-Date: Mon, 23 Nov 2009 16:38:14 -0000

On Mon, 23 Nov 2009 18:14:12 +0200, Dirk-Jan Binnema <djcb.bulk@gmail.com> wrote:
> Did you try it with -O2? Without optimizations many of the warnings are not
> issued.

Yes,

$ cat > foo.c
#include <stdlib.h>
#include <unistd.h>
int main()
{
  malloc(5);
  write(2,0,10);
  return 0;
}
$ gcc -static -std=c89 -O0 -Wall -Wextra -pedantic -o foo foo.c
$ objdump -d -M intel foo |grep -A12 '<main>'
00000000004002a4 <main>:
  4002a4:       55                      push   rbp
  4002a5:       48 89 e5                mov    rbp,rsp
  4002a8:       bf 05 00 00 00          mov    edi,0x5
  4002ad:       e8 6e 61 00 00          call   406420 <__libc_malloc>
  4002b2:       ba 0a 00 00 00          mov    edx,0xa
  4002b7:       be 00 00 00 00          mov    esi,0x0
  4002bc:       bf 02 00 00 00          mov    edi,0x2
  4002c1:       e8 ea a0 00 00          call   40a3b0 <__libc_write>
  4002c6:       b8 00 00 00 00          mov    eax,0x0
  4002cb:       c9                      leave  
  4002cc:       c3                      ret    
  4002cd:       90                      nop
$ gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --prefix=/usr --enable-shared --enable-languages=c,c++,fortran,objc,obj-c++,ada --enable-threads=posix --mandir=/usr/share/man --infodir=/usr/share/info --enable-__cxa_atexit --disable-multilib --libdir=/usr/lib --libexecdir=/usr/lib --enable-clocale=gnu --disable-libstdcxx-pch --with-tune=generic
Thread model: posix
gcc version 4.4.2 (GCC)
$ uname -a
Linux kunyang 2.6.31-ARCH #1 SMP PREEMPT Tue Nov 10 19:01:40 CET 2009 x86_64 Intel(R) Core(TM)2 Duo CPU P8700 @ 2.53GHz GenuineIntel GNU/Linux


Seems fishy.

Jed