From: David Brown <david@westcontrol.com>
Cc: Oleg Endo <oleg.endo@t-online.de>, Andrew Haley <aph@redhat.com>,
<gcc-help@gcc.gnu.org>
Subject: Re: GCC vs MSVC compiler issues in a port
Date: Thu, 27 Dec 2012 13:10:00 -0000 [thread overview]
Message-ID: <50DC48C6.5010204@westcontrol.com> (raw)
In-Reply-To: <50D6991B.1070904@yahoo.com>
On 23/12/12 06:39, John Cotton Ericson wrote:
> On 12/22/2012 11:30 AM, Andrew Haley wrote:
>> You need to start with an unoptimized build; does it crash in the same
>> way? What about building with -Wall ?
> I have been using no optimization other than -ffast-math. Whether or not
> I used -msse and -march=native or -mi386 I get arithmetic overflows
> without -ffast-math.
>
> I am looking at the warnings with -Wall. Nothing too interesting but
> I'll try to resolve them.
>
There are more warning flags in gcc than just -Wall - perhaps some
others will give you new clues (though there might be a lot of "noise",
especially with old code). Also note that many of the gcc warnings only
work well when you have optimisation enabled, as they depend on some of
the analysis passes in the optimiser. So try at least "-O2 -Wall -Wextra".
next prev parent reply other threads:[~2012-12-27 13:10 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <50D57597.7050304@yahoo.com>
2012-12-22 9:07 ` John Cotton Ericson
2012-12-22 12:11 ` Oleg Endo
2012-12-23 5:39 ` John Cotton Ericson
2012-12-27 13:10 ` David Brown [this message]
2012-12-28 23:46 ` Oleg Endo
2013-01-18 22:31 ` John Cotton Ericson
2012-12-22 16:31 ` Andrew Haley
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