On 01/06/2011 07:18 AM, Jarod Wilson wrote:
> On Thu, Jan 06, 2011 at 12:15:51AM -0500, Don Zickus wrote:
>> On Wed, Jan 05, 2011 at 11:47:41PM -0500, Jarod Wilson wrote:
>>>> So, what do I do? I simply prep from source
>>>> (rpmbuild -bp kernel.spec)
>>>> and then cd to ~/rpmbuild/BUILD/kernel-2.6.35.10-74/linux-2.6.35.i686,
>>>> copy my current kernel's config file to .config, run
>>>> make oldconfig and
>>>> male all
>>>> and that does it.
>>>> The new config file inherits my enabled drivers selections.
>>> > From the kernel spec:
>>>
>>> # Dynamically generate kernel .config files from config-* files
>>> make -f %{SOURCE20} VERSION=%{version} configs
>>>
>>> And Source20 is Makefile.config, from which with a bit of effort, you can
>>> determine the order in which the various config-* files are smashed
>>> together to form the end result .config files.
>>>
>>> I think this topic actually came up once in the past, and an idea to add
>>> an extra layer similar to the 'if rhel' clause in the spec was kicked
>>> around, but never came to fruition. In theory, that file would, if
>>> present, apply additional Kconfig changes from an additional overrides
>>> file. It could be an empty file by default, but obviously named or
>>> documented, so that anyone rebuilding could simply put their assorted
>>> additional config options in there, and they'd always be applied over the
>>> top of the stock config options.
>> Ha! I can't believe the rhel stuff I added is still there.
> I dunno if it got used for RHEL6 initially or not... I'd be inclined to
> rip it out, and we can add something similar back next time we've got
> another RHEL major release on the horizon... Maybe that gives away too
> many secrets though. :)
>
>> We could probably mimic the old linux-kernel-test.patch which was a stub
>> patch to allow developers to quickly test their patches without mucking
>> with the spec file, but instead for config files (like the %rhel thing).
> I think this would suffice:
>
> # This file is empty in stock builds, but can be populated with local
> # config option overrides for custom local builds
> Source1000: config-local
>
>
> Then, in %prep, in a loop similar to the if rhel one:
>
> ./merge.pl %{SOURCE1000} $i.tmp> $i
>
>
> Since the file is empty in stock configs, the above in that case would
> simply be a no-op. If its populated by someone doing a local rebuild, then
> their config options get overlayed on top of the stock ones.
>
Thanx! I will try it.
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