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Date: Sat, 1 Aug 2009 11:47:59 +0300
Message-ID: <647fe9b10908010147j1cc16f97o7dc9ff609387cc3@mail.gmail.com>
Subject: Re: Some patches to DJGPP v2.04 (GCC-4.4.1 related)
From: Ozkan Sezer <sezeroz AT gmail DOT com>
To: djgpp-workers AT delorie DOT com
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On Sat, Aug 1, 2009 at 9:31 AM, Andris Pavenis<andris DOT pavenis AT iki DOT fi> wrote:
> At first fighting with strict aliasing violation warnings from emu387.cc
> could be rather big work. Perhaps it is easier to tell GCC not to
> complain. The option -fno-strict-aliasing is available beginning from
> gcc-2.8.0 if I remember correctly. So unless somebody terribly
> wants to build DJGPP v2.04pre with really ancient gcc-2.7.2.1, I guess
> it should be OK to apply the patch. Am I right?
>
> There also was type punning related warning from src/compat/mntent/mntent.c.
> Does the related patch seem OK?
>
> I already applied some other small patches.
>
> After that (+ telling gcc to stay silent about conflicting parameters
> for some builtin functions in libm and using command line option -m32
> for building host tools) all seems to build OK using gcc-4.4.1 under
> Fedora 11 x86_64.
>
> Andris
>

Patches seem OK.  Although you may want to build using
-Wstrict-aliasing=2 before finishing your work, because gcc
seems to hide some of the warnings _and_ may generate
bad code, and in some worse cases may not warn even
with that warning flag and still generate bad code which
happened to me once (that was with gcc-4.5, though..)
My 2 cents.

--
Ozkan