linux-kernel - Re: Announce: gcc bogus warning repository

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Message-Id: <20061001100747.d1842273.rdunlap@xenotime.net>
Date:	Sun, 1 Oct 2006 10:07:47 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: Announce: gcc bogus warning repository

On Sun, 01 Oct 2006 09:44:55 -0400 Jeff Garzik wrote:

> 
> The level of warnings in a kernel build has lately increased to the 
> point where it is hiding bugs and otherwise making life difficult.
> 
> In particular, recent gcc versions throw warnings when it thinks a 
> variable "MAY be used uninitialized", which is not terribly helpful due 
> to the fact that most of these warnings are bogus.
> 
> For those that may find this valuable, I have started a git repo that 
> silences these bogus warnings, after careful auditing of code paths to 
> ensure that the warning truly is bogus.
> 
> The results may be found in the "gccbug" branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6.git
> 
> This repository will NEVER EVER be pushed upstream.  It exists solely 
> for those who want to decrease their build noise, thereby exposing true 
> bugs.
> 
> The audit has already uncovered several minor bugs, lending credence to 
> my theory that too many warnings hides bugs.

I usually build with must_check etc. enabled then grep them
away if I want to look for other messages.  I think that the situation
is not so disastrous.

---
~Randy
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