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Re: How reliable is GCC-3.3.1 wrt building mipsel-linux kernel?

To: David Daney <ddaney@avtrex.com>
Subject: Re: How reliable is GCC-3.3.1 wrt building mipsel-linux kernel?
From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 20 Nov 2003 00:30:23 +0100
Cc: linux-mips@linux-mips.org
In-reply-to: <3FBACA0F.7070207@avtrex.com>
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References: <3FBACA0F.7070207@avtrex.com>
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On Tue, Nov 18, 2003 at 05:40:31PM -0800, David Daney wrote:

> The subject line kind of says it all.
> 
> We are running linux 2.4.18 on a mips4Kc core (ATI Xilleon 225) and find 
> it to be quite stable when compiled with gcc 2.96/binutils 2.11.92.0.10
> 
> When the kernel is compiled with gcc 3.3.1/binutils 2.14.90.0.5 it also 
> seems to be quite stable, except for when one certian driver is used 
> (basically an mpeg decoder driver).  Under certian conditions the system 
> seems to "freeze" (no messages printed anywhere and only a hard reset 
> will recover).
> 
> Yeah that is a good bug report...
> 
> But my main question is this:  Have other people experienced 
> miscompilation (ie bad code generation) with gcc 3.3.1?

Quite frequently using a new, possibly more agressive compiler triggers
bugs in the kernel code ...

  Ralf

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