Re: [PATCH 1/5] Use common files for AT91SAM9 configuration

[Ulf Samuelsson <ulf.samuelsson@atmel.com>]

Koen Kooi skrev:
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> On 21-10-10 10:43, Frans Meulenbroeks wrote:
> 
>> PS: my opinion is that machine maintainers generally know better what
>> kernel works best for their machines than distro owners;
> 
> And what's stopping them to put DEFAULT_PREFERENCE_machine and
> COMPATIBLE_MACHINE in the kernel recipes?
> There is no technical reason for setting it in machine.conf, so why
> should we break the orthogonality for that?
> 
>> PPS: what's next? removing the PREFERRED_PROVIDER_virtual/kernel from
>> the machine configs because you feel you know better ?
> 
> That is actually an option these days since most kernel recipes set
> COMPATIBLE_MACHINE correctly :)
> But seriously, there are use cases for one distro to use a different
> kernel for a given machine for whatever reasons.
> 
> This whole situation is a mess because recipes/linux is a mess. It would
> be a nice topic for OEDEM to see if we should switch to a poky BSP
> model. It would boils down to:
> 
> 1 bblayer per machine or SOC_FAMILY containing:
> * machine.conf
> * first and second stage bootloaders
> * kernel

I have already come to the conclusion that we could have a single 
linux.bb recipe.

This assumes that you define things like KERNEL_VERSION, SOC_FAMILY
etc. outside the recipe and then include files with include filenames
containing approproate ENVIRONMENT variables.

I.E:
include $(KERNEL_VERSION)/kernel_source
include	$(SOC_FAMILY)/$(KERNEL_VERSION)/kernel_patch

etc.

> 
> I can see some serious issues with that, but that's for another thread
> to discuss.
> 
> regards,
> 
> Koen
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BR
Ulf Samuelsson