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Date: Wed, 25 Jul 2007 09:57:30 +0200
From: Sam Ravnborg <sam@ravnborg.org>
To: Nathan Lynch <ntl@pobox.com>
Subject: Re: "do section mismatch check on full vmlinux" breaks powerpc build
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On Tue, Jul 24, 2007 at 05:41:05PM -0500, Nathan Lynch wrote:
> Hello-
> 
> 2.6.23-rc1 breaks the build for 64-bit powerpc for me (using
> maple_defconfig):
> 
>   LD      vmlinux.o
> powerpc64-unknown-linux-gnu-ld: dynreloc miscount for
> kernel/built-in.o, section .opd
> powerpc64-unknown-linux-gnu-ld: can not edit opd Bad value
> make: *** [vmlinux.o] Error 1
> 
> This is on a i386 host with:
> powerpc64-unknown-linux-gnu-gcc (GCC) 4.1.2
> GNU ld version 2.16.1
> 
> Reverting the following commit fixes it:
> 
> commit 741f98fe298a73c9d47ed53703c1279a29718581
> Author: Sam Ravnborg <sam@ravnborg.org>
> Date:   Tue Jul 17 10:54:06 2007 +0200
> 
>     kbuild: do section mismatch check on full vmlinux
> 
> 
> However, I see a possibly related binutils patch:
> http://article.gmane.org/gmane.comp.gnu.binutils/33650
> 
> Will there be a kbuild fix for this or should I update my binutils?
> 
What kbuild does is a very basic link of a number of .o files.
Why this suddenly breaks I do not fully understand and I see no obvious
way to fix it in kbuild.

And browsing arch/ppc/kernel/vmlinux.lds.S I see no special handling of .opd.

Puzzeled?
I'm not sure how to deal with this one. Would prefer to say that this is
a binutils bug so fix it there but then I like to provide a workaround
for those with faulty toolchains.
I could put the link and the additional modpost check inside a
CONFIG_SOMETHING....

	Sam