[Buildroot] Adding package that builds Kernel Module (*.ko) to Buildroot environment

[Thomas De Schampheleire]

On Thu, Aug 4, 2011 at 9:45 AM, Thomas Petazzoni
<thomas.petazzoni at free-electrons.com> wrote:
> Hello,
>
> Le Thu, 04 Aug 2011 08:30:21 +0200,
> Aleksandar Zivkovic <Aleksandar.Zivkovic at rt-rk.com> a écrit :
>
>> I would like to add additional package to Buildroot that will build
>> Linux kernel driver.
>> For that I need:
>> - dependency: build of this package mustn't be started before kernel
>> source is available
>> - kernel source directory: currently, the best I know is:
>> $(BASE_DIR)/build/linux-$(BR2_LINUX_KERNEL_VERSION)
>>
>> I started with package approach but bumped to stated dependency
>> problem. Next what I tried is to edit linux/linux.mk to include my
>> driver source download, extract. build and install but not so
>> familiar with Buildroot scripting...
>>
>> Did somebody already done something similar? What is best approach?
>> Examples are welcomed...
>
> Attached, you will find :
>
>  * mykmod-1.0.tar.bz2, the source code of an hello world like kernel
>   module ;
>
>  * kmod-example.patch, which adds support for compiling this kernel
>   module into the Buildroot package infrastructure

Given the fact that we had similar questions before, I think it is
worth adding this example (mainly the package .mk file) to the
buildroot documentation, don't you think?
Moreover, the linux-fusion package could apparently be simplified by
using LINUX_MAKE_FLAGS as in your example.

Best regards,
Thomas