linux-kernel - Re: crossbuild fails in modpost

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Date:	Sun, 18 May 2008 21:55:58 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	Adrian Bunk <bunk@...nel.org>
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 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.
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