linux-kernel - Re: [PATCH 4/6] Add support for LZO-compressed kernels for ARM

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Message-ID: <4A819642.10700@zytor.com>
Date:	Tue, 11 Aug 2009 09:03:14 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Albin Tonnerre <albin.tonnerre@...e-electrons.com>
CC:	Sam Ravnborg <sam@...nborg.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Matthieu CASTET <matthieu.castet@...rot.com>,
	Alain Knaff <alain@...ff.lu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-embedded@...r.kernel.org" <linux-embedded@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [PATCH 4/6] Add support for LZO-compressed kernels for ARM

On 08/11/2009 02:44 AM, Albin Tonnerre wrote:
> Hi Sam,
> 
> On Fri, Aug 07, 2009 at 11:08:16PM +0200, Sam Ravnborg wrote :
>> We could add libgcc as a prerequisite.
>> Untested patch below.
> 
> When compiling with this patch applied, I get the following error:
> 
>   Kernel: arch/arm/boot/Image is ready
>     LD      arch/arm/boot/compressed/vmlinux
> /home/albin/x-tools/arm-unknown-linux-uclibcgnueabi/lib/gcc/arm-unknown-linux-uclibcgnueabi/4.3.2/libgcc.a(_dvmd_lnx.o):
> In function `__div0':
> /home/albin/devel/free-electrons/toolchain/targets/src/gcc-4.3.2/libgcc/../gcc/config/arm/lib1funcs.asm:1079:
> undefined reference to `raise'
> make[2]: *** [arch/arm/boot/compressed/vmlinux] Error 1
> make[1]: *** [arch/arm/boot/compressed/vmlinux] Error 2
> 
> I've got no idea where this symbol is defined, though. Has anyone an idea on
> this ?
> 

raise() gets called by libgcc to handle division by zero.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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