[ELDK] error building kernel modules

[Mark Little]

Thank you for the insight into (and suggested solution to) this build issue.

FWIW, the 2.6.30.10 kernel is one we got from the DENX git repository 
<http://git.denx.de/?p=linux-2.6-denx.git;a=tags> some time ago.

Are there other incompatibilities between utilities and/or packages in 
the DENX 4.2 distribution and the 2.6.30.10 kernel package from the DENX 
git repository that we should be aware of that you know about?

Thanks again,
--
Mark Little


Wolfgang Denk wrote:
> Dear Mark Little,
>
> In message <4BABB407.9030502 at ambientcorp.com> you wrote:
>   
>> PC with the Denx (4.2) toolchain.  Specifically, the kernel module build 
>> step errors out with the following messages:
>>
>>     if [ -r System.map -a -x
>>     {path_to}/denxbuild/output/default_ppc_4xx.list_install/usr/bin/depmod.pl
>>     ]; then
>>     {path_to}/denx_build/output/default_ppc_4xx.list_install/usr/bin/depmod.pl
>>     -ae -F System.map  -b
>>     {path_to}/denxbuild/output/busybox_ppc_4xx.list_install/ppc_4xx 
>>     2.6.30.10; fi
>>     make[1]: *** [_modinst_post] Error 1
>>     make[1]: Leaving directory `{path_to}/linux-2.6-denx'
>>     Finished building and installing kernel modules
>>     
>
> Um... this is obviously NOT the exact error messages. Next time,
> please post the ORIGINAL error messages without any editing. Even if
> you consider the editing to be helpful, it ain't.
>
>   
>> and there is no modules.dep file generated.  This looks to me like an 
>> incompatibility between depmod.pl and the kernel Makefile.  
>> Specifically, it appears that depmod.pl expects a -r (or -s) switch 
>> before the kernel version, but the versions of depmod that I see in a 
>> few different flavors of linux all expect the version parameter to be 
>> positional (and not specified as a target of a switch).
>>
>> Can anyone provide any insight into this problem, and/or a solution for it?
>>     
>
> The trigger of the problem was this commit:
>
> commit 75bccd881a49d2da796ec0852158f957dc023f61
> Author: Gilles Espinasse <g.esp at free.fr>
> Date:   Sat Mar 7 13:57:25 2009 +0100
>
>     kbuild: remove unused -r option for module-init-tool depmod
>     
>     Following a thread on busybox mailing list
>     depmod -r option is ignored by module-init-tools depmod
>     -r option break busybox depmod.
>     
>     So the best solution look to remove -r from kernel Makefile
>     
>     Signed-off-by: Gilles Espinasse <g.esp at free.fr>
>     Signed-off-by: Sam Ravnborg <sam at ravnborg.org>
>
>
> The depmod.pl as included with ELDK 4.2 (release date April 01, 2008)
> obviously predates this change and still uses the - then perfectly
> legal - "--release" resp. "-r" argument.
>
>
> For a fix, download a recent version of the BusyBox source code (for
> example here [1]) and use the included "examples/depmod.pl" script as
> a replacement.
>
> [1] http://busybox.net/downloads/busybox-1.16.0.tar.bz2
>
> Best regards,
>
> Wolfgang Denk
>
>