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

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On Tue, Aug 11, 2009 at 03:39:43PM +0200, Sam Ravnborg wrote :
> On Tue, Aug 11, 2009 at 11:44:18AM +0200, 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 ?
> 
> To make sure thet hack did what it was intended could you
> try to build with V=1 and post output of the ld command.
> 

Here it is:

make -f scripts/Makefile.build obj=arch/arm/boot/compressed
arch/arm/boot/compressed/vmlinux
  arm-unknown-linux-uclibcgnueabi-ld -EL    --defsym zreladdr=0x20008000
  --defsym initrd_phys=0x20410000 --defsym params_phys=0x20000100 -p
  --no-undefined -X -T arch/arm/boot/compressed/vmlinux.lds
  arch/arm/boot/compressed/head.o arch/arm/boot/compressed/piggy.gzip.o arch/arm/boot/compressed/misc.o
  /home/albin/x-tools/arm-unknown-linux-uclibcgnueabi/lib/gcc/arm-unknown-linux-uclibcgnueabi/4.3.2/libgcc.a -o 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'

So it seems like the hack indeed did what is was supposed to do.

Regards,
-- 
Albin Tonnerre, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com
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