[oe] Some beginners problems

[Thomas Kunze]

Sledz, Steffen wrote:
>>>>> I wan't to make an image (e.g. minimal-image) for atngw100 
>>>>> but with different linux kernel configuration (e.g. 
>>>>> CONFIG_EXT2_FS=y). What's th right way to do this?
>>>>>
>>>>> * Just edit packages/linux/linux-2.6.24/atngw100/defconfig?
>>>>>       
>>>>>           
>>>>  
>>>> Yes. But don't forget to increase the PR. Otherwise bitbake 
>>>> doesn't know that the recipe was changed and doesn't rebuild
>>>> it.
>>>>     
>>>>         
>>> The change is not a bug fix or something like this. It's 
>>> just a variant and not mentioned to become committed. So if i 
>>> increase PR and someone else fixes a bug and increases PR too 
>>> and I pull this fixes from git I have a conflict.  :(
>>>   
>>>       
>> Yes but you will always have this problem with local changes and it 
>> shouldn't be too hard to resolve such conflicts.
>>     
>
> Is it possible (and is it a good idea) to create a new distro (or a new machine) for such a purpose?
>
>   
In oe a distro decides which versions of packages to use or which 
providers to use (qtopia-x11 vs. qtopia-framebuffer for example.)
A machine decides which architecture/kernel etc you have. I don't see 
how you could abuse that to guard against conflicts between
local changes and upstream changes.
> Or is it possible to set parameters in local.conf which are available in the package bbfile for evaluation?
>   
This is possible but doesn't solve the problem imo.
You may want to look at bitbake-collections:
http://bec-systems.com/oe/html/special_bitbake_collections.html
http://www.pokylinux.org/doc/poky-handbook.html#usingpoky-changes-collections
as Javi Roman suggested. Maybe this is what you want. But I would push 
everything upstream
that is pushable and fix conflicts for all other stuff as necessary.