linux-kernel - Re: [PATCH] kbuild: Fix gcc -x syntax

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Message-ID: <20120929082459.GA10005@brahe.fritz.box>
Date:	Sat, 29 Sep 2012 09:24:59 +0100
From:	Bernhard Walle <bernhard@...lle.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Jean Delvare <jdelvare@...e.de>, linux-kernel@...r.kernel.org,
	x86@...nel.org, Michal Marek <mmarek@...e.cz>,
	Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH] kbuild: Fix gcc -x syntax

Hi,

* Ingo Molnar <mingo@...nel.org> [2012-09-29 08:37]:
> * Jean Delvare <jdelvare@...e.de> wrote:
> 
> > The correct syntax for gcc -x is "gcc -x assembler", not "gcc 
> > -xassembler". Even though the latter happens to work, the 
> > former is what is documented in the manual page and thus what 
> > gcc wrappers such as icecream do expect.
> > 
> > This isn't a cosmetic change. The missing space prevents 
> > icecream from recognizing compilation tasks it can't handle, 
> > leading to silent kernel miscompilations.
> 
> Although we can apply this patch, it won't solve the problem of 
> building older kernels (and bisecting, etc.).
> 
> Wouldn't it be prudent to increase the compatibility of 
> icecream, so that it accepts what GCC accepts in practice,
> such as -xassembler?

Wouldn't it make sense to do both? Using the documented syntax in the
build system *and* increase compatibility in 3rd party tools?


Regards,
Bernhard
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