[OE-core] [PATCH V2] [RFC] kernel: rework kernel and module classes to allow for building out-of-tree modules

[Gary Thomas]

On 03/16/2011 01:26 PM, Darren Hart wrote:
> On 03/16/2011 10:54 AM, Koen Kooi wrote:
>>
>> Op 16 mrt 2011, om 18:04 heeft Darren Hart het volgende geschreven:
>>
>>> NOT FOR INCLUSION
>>>
>>> Before we include something like this, it needs review from folks like Koen and
>>> Gary to confirm it works in their environment as well.
>>>
>>> The existing infrastructure uses an external build tree which references the
>>> kernel source in the work dir. If run with rm work, building external modules
>>> will fail.
>>>
>>> This patch places a configured source tree in sysroots. Striking a balance
>>> between minimal size and minimal maintenance is difficult. A fully configured
>>> tree is about 500MB after a clean. This version leans on the side of caution and
>>> removes only the obviously unecessary parts of the source tree to conserve
>>> space, resulting in about 170MB. The arch directories would be some additional
>>> pruning we could do. Given examples from the devel package from distributions, I
>>> suspect this size could be reduced to 75MB or so, but at the cost of a much more
>>> complex recipe which is likely to require a great deal more maintenance to keep
>>> current with kernel releases.
>>>
>>> Care is also taken to clean the hostprogs in scripts, and the modules are
>>> responsible for building them as needed. Although it is unclear to me if this is
>>> really necessary, especially considering that modules put these bits back as
>>> soon as they compile. If we are not generating an sstate package, I suspect we
>>> can ignore these.
>>>
>>> Please try this with your modules and let me know how it does. I tried to take
>>> non linux-yocto kernel recipes into account, but I have only tested with
>>> linux-yocto and the hello-mod recipe so far.
>>>
>>> V2: o Address 000 perm quilt files (don't copy .pc dir)
>>> o Clear linux-yocto meta dir from sysroots
>>>
>>> Signed-off-by: Darren Hart<dvhart at linux.intel.com>
>>
>> This one works beautifully, so:
>>
>> Acked-by: Koen Kooi<koen at dominion.thruhere.net>
>
> Thanks Koen.
>
> Gary, can you give this version a spin?
>
> If it works, I'm going to suggest we take this as is and carefully prune away bits we don't need over time so we can get adequate testing across multiple archs, platforms, and
> modules. Same for the hostprogs cleaning bits.
>

It also worked for me.  Thanks - you can add

Acked-by: Gary Thomas <gary at mlbassoc.com>

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