Op 6 mrt. 2013, om 08:25 heeft Peter Kurrasch <gtin...@hotmail.com> het 
volgende geschreven:

> Hi Koen--
> 
> Thanks for the tip!  I'm able to make changes to the kernel config and 
> generate "proper" objects that don't get wiped out the next time I try to 
> build something.  I do have 2 questions, though....
>>       1)  ./oebb.sh update
>>       2)  bitbake systemd-git
>>       3)  bitbake virtual/kernel -c menuconfig
>> Did you save the resulting .config at this point? If not, you need to
>> copy it back to the 'defconfig' in the metadata and increase
>> (MACHINE_KERNEL_)PR in the recipe for the package managers to notice it.
> First, I copied my changes to the file 
> meta-ti/recipes-kernel/linux/linux-mainline-3.2/beagleboard/defconfig like 
> you say and then modified the file meta-ti/conf/machine/include/omap3.inc to 
> change MACHINE_KERNEL_PR from "r122" to "r123".  So my question is if it is 
> necessary and/or recommended that I bump up the _PR value with every change 
> to defconfig?

Yes, but see below

>  It appears to me that I can make multiple changes to defconfig and the 
> change gets picked up right away when I go to build the kernel--without 
> changing the _PR to "r124", for example.

But the packagemanager won't see the difference

> 
> My second question is if it's okay and/or a good idea to change the 
> _PR_append value instead?  In looking at the 
> meta-ti/recipes-kernel/linux/linux-mainline_3.2.bb I saw the line:
>    MACHINE_KERNEL_PR_append = "a"
> ...and I was wondering if changing that to "b" would have the same effect as 
> changing "r122" to "r123"?  The location of the .bb file makes it easier to 
> find than hunting down the omap3.inc file, so if it works just as well I'd 
> rather change the _PR_append instead.

Exactly! The PR_append is for changes to the kernel that don't influence 
external modules (sgx, dsp etc) and the MACHINE_KERNEL_PR is increased when 
external modules do need to get rebuilt.

regards,

Koen
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