linux-kernel - Re: config automatically switches from 32-bit to 64-bit for x86

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Message-ID: <20100527161134.GA2690@citd.de>
Date:	Thu, 27 May 2010 18:11:34 +0200
From:	Matthias Schniedermeyer <ms@...d.de>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Jaswinder Singh Rajput <jaswinderlinux@...il.com>,
	Sam Ravnborg <sam@...nborg.org>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: config automatically switches from 32-bit to 64-bit for x86

On 27.05.2010 11:49, Christoph Hellwig wrote:
> On Thu, May 27, 2010 at 05:37:36AM +0530, Jaswinder Singh Rajput wrote:
> > Hello,
> > 
> > I am trying to build 32 bit kernel image on 64-bit machine but after
> > 'make menuconfig' it automatically switches 32-bit to 64-bit.
> > 
> > Is this a BUG or did intentionally.
> 
> I think it's intentional, but I'm really annoyed by this behaviour.
> I really don't want my config to change from a normal make depending
> on uname output.  We do have a CONFIG_64BIT in .config which should
> be respected.  uname output is a good indicator for a previously
> unconfigured kernel, but shouldn't change settings for a fully
> congigured build.  Forgetting the linux32 command happens at least two
> dozen times to me everyday, leading to a few lost seconds that add
> up in the end.

Just use ARCH=x86. That ARCH respects CONFIG_64BIT from .config and 
"CONFIG_64BIT" is a config-option (the very first in menuconfig)





Bis denn

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