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Date: Sat, 12 Jan 2002 01:29:43 +0100
From: eddantes@wanadoo.fr
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To: "M. Edward (Ed) Borasky" <znmeb@aracnet.com>
CC: Daniel Phillips <phillips@bonn-fries.net>, Dan Kegel <dank@kegel.com>,
        "Timothy D. Witham" <wookie@osdl.org>,
        Luigi Genoni <kernel@Expansa.sns.it>,
        Mike Galbraith <mikeg@wen-online.de>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        stp@osdl.org
Subject: Re: Regression testing of 2.4.x before release?
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M. Edward (Ed) Borasky wrote:

[snip]

> One particular application for which gcc 3.x *and* gcc 2.96.x are
> seriously deficient, at least on Intel/AMD 32-bit systems, is the
> high-performance linear algebra library Atlas. As a result, *my* default
> for compiling numerical applications is the Atlas-recommended one,
> 2.95.3. For the kernel, I use whatever the Red Hat 7.2 default is.
> 

Mmhh... Just remember gcc 2.96.x is NOT a regular gcc release, you can 
check at:
http://www.gnu.org/software/gcc/releases.html
AFAIK, it is a RH-hacked pre-3.0, which is probably not the best thing 
to use for anything.

The 3.x series are know to generate pretty slow code, anyway. So I bet 
your experience is pretty normal. I still stick with 2.95.[34] for x86 
kernel compile, although I'm using 3.0 for all purposes on Hitashi SH, 
as only gcc>=3.0 correctly supports the sh4.

/dantes