Compile external module against linux source and use functionality in linux source

[Arjun Pandey]

Thanks Paul. Let me try this out.

Regards
Arjun

On Thu, Sep 25, 2014 at 12:59 PM, Paul Bolle <pebolle at tiscali.nl> wrote:
> On Thu, 2014-09-25 at 12:30 +0530, Arjun Pandey wrote:
>> On Thu, Sep 25, 2014 at 12:28 PM, Paul Bolle <pebolle at tiscali.nl> wrote:
>> > On Thu, 2014-09-25 at 12:24 +0530, Arjun Pandey wrote:
>> >> I tried moving the module to kernel tree as well. Ideally this will be
>> >> out of tree module. That still didn't work.
>> >> I have included a header file with the extern function declaration in
>> >> the source file that i modified.
>> >> That didn't help either.
>
> Building a module built-in requires a bit more: changes to a kernel tree
> Kconfig file and a Makefile. There must be a lot of documentation on
> this. But I would do something like
>     git grep -w tristate $(git ls-files "net/*Kconfig*")
>
> and pick a few Kconfig symbols (ie, the things with lines reading
> "config EXAMPLE"). The grep the tree again for their macros:
>     git grep -w "CONFIG_EXAMPLE" net/
>
> and figure out how things all fit together.
>
> (My guess, of course, is that your linker error disappears when you
> manege to build the module built-in. Once we know that, we can look
> whether it's actually possible to achieve what you want to do with an
> external module.)
>
> Hope this helps.
>
>
> Paul Bolle
>