linux-kernel - Re: crossbuild fails in modpost

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Message-ID: <20080518204258.GL8140@cs181133002.pp.htv.fi>
Date:	Sun, 18 May 2008 23:42:58 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	Jiri Slaby <jirislaby@...il.com>, Sam Ravnborg <sam@...nborg.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Michael Buesch <mb@...sch.de>,
	Gordon Farquharson <gordonfarquharson@...il.com>
Subject: Re: crossbuild fails in modpost

On Sun, May 18, 2008 at 09:55:58PM +0200, Jan Engelhardt wrote:
> 
> On Thursday 2008-05-15 22:46, Adrian Bunk wrote:
> >>
> >> Well, the compiler is the same, but it's told to compile the kernel with  
> >> -m64. It runs on x86_64 kernel and i386 userspace. It's debian i386 gcc  
> >> package which understands x86_64 objects too. No SUBARCH option, it seems 
> >> to default to x86_64.
> >>...
> >
> >Unless you manually fiddle with ARCH you can only build a kernel with 
> >the same 32<->64bit setting as your currently running kernel (no matter 
> >which userspace you use)...
> 
> echo -en '#!/bin/bash\nexec gcc -m32 "$@"\n' >/usr/local/bin/i386-linux-gcc
> make CC=i386-linux-gcc
> then the if($(CC),$(HOSTCC)) check should get true.

No doubt that you can work around the problem.

But that's not a solution.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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