From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-return-160637-listarch-gcc=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 16788 invoked by alias); 13 Apr 2010 18:05:48 -0000
Received: (qmail 16780 invoked by uid 22791); 13 Apr 2010 18:05:47 -0000
X-SWARE-Spam-Status: No, hits=-1.9 required=5.0 	tests=BAYES_00
X-Spam-Check-By: sourceware.org
Received: from pogma.xen.prgmr.com (HELO pogma.xen.prgmr.com) (68.68.97.8)     by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 13 Apr 2010 18:05:41 +0000
Received: from tw.local (wnpgmb1316w-ds01-50-57.dynamic.mts.net [206.45.50.57]) 	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) 	(No client certificate requested) 	by pogma.xen.prgmr.com (Postfix) with ESMTP id C9BC5BF5FD; 	Tue, 13 Apr 2010 18:05:39 +0000 (UTC)
Message-ID: <4BC4B272.5090606@pogma.com>
Date: Tue, 13 Apr 2010 18:14:00 -0000
From: Peter O'Gorman <peter@pogma.com>
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.7) Gecko/20100120 Fedora/3.0.1-1.fc11 Thunderbird/3.0.1
MIME-Version: 1.0
To: IainS <developer@sandoe-acoustics.co.uk>
CC: Ian Lance Taylor <iant@google.com>, GCC Development <gcc@gcc.gnu.org>
Subject: Re: specs question.
References: <6807833B-8AB9-468B-9936-09025C700DF7@sandoe-acoustics.co.uk> <mcrsk701f7u.fsf@dhcp-172-17-9-151.mtv.corp.google.com> <DAC85AB3-3F05-481C-AB57-A563BC3E6230@sandoe-acoustics.co.uk> <mcr7hoc1ckj.fsf@dhcp-172-17-9-151.mtv.corp.google.com> <4F670628-977A-4305-8E0B-1D64E95833EA@sandoe-acoustics.co.uk>
In-Reply-To: <4F670628-977A-4305-8E0B-1D64E95833EA@sandoe-acoustics.co.uk>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes
Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc/>
List-Post: <mailto:gcc@gcc.gnu.org>
List-Help: <http://gcc.gnu.org/ml/>
Sender: gcc-owner@gcc.gnu.org
X-SW-Source: 2010-04/txt/msg00293.txt.bz2

On 04/12/2010 07:01 PM, IainS wrote:

> 
> It clearly depends on something no-obvious.
> 
> gcc hello.c  -g -o hc  => dsymutils gets run  (not expected from the
> syntax, assuming that sources are irrelevant)
> 
> gcc hello.o -g -o hc  => no dsymutils (expected from the absence of '.o'
> in the list)

Hi Iain,

We don't want to run dsymutil if there are .o files, let the developer
do that.

If someone just does gcc -g -o foo foo.c, then any debugging information
will be lost when the temporary .o file is removed, thus, to allow
debugging such a foo, the compiler must run dsymutil.

Of course, it doesn't need to run for stabs, or -g0.

Strange, Apple's gcc-4.2 doesn't have this bug (-lm), yet that portion
of the specs appears identical.

Peter