Using a defconfig refers to an in-tree defconfig file

Using a defconfig refers to an in-tree defconfig file

[John Weber]

I thought I would bounce this one of the mailing list.

Is there any reason why we shouldn't simply use the defconfig from the kernel 
tree if appropriate?

We would do this by the defconfig file in the recipe refer to a filename in the 
kernel tree. For example, in the file 
recipes-kernel/linux/linux-wandboard-3.10.17/defconfig would be a single line:

    use-kernel-config=wandboard_defconfig

I've tested this already and it works.

As many of the kernels being used here are managing their own defconfigs 
in-tree, they are forced to keep the defconfig in the metadata in-sync.  This 
would be a way to remove that requirement.

Re: Using a defconfig refers to an in-tree defconfig file

[Eric Nelson]

Hi John,

On 02/25/2014 02:29 PM, John Weber wrote:
> I thought I would bounce this one of the mailing list.
>
> Is there any reason why we shouldn't simply use the defconfig from the
> kernel tree if appropriate?
>
> We would do this by the defconfig file in the recipe refer to a filename
> in the kernel tree. For example, in the file
> recipes-kernel/linux/linux-wandboard-3.10.17/defconfig would be a single
> line:
>
>     use-kernel-config=wandboard_defconfig
>

In general, +1 from our end.

The primary down-side is that the Yocto needs may differ from other
distributions, but then again, any particular user will likely
want to tweak a bit anyway.

> I've tested this already and it works.
>
> As many of the kernels being used here are managing their own defconfigs
> in-tree, they are forced to keep the defconfig in the metadata in-sync.
 >
> This would be a way to remove that requirement.
> _______________________________________________
> meta-freescale mailing list
> meta-freescale@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/meta-freescale

Re: Using a defconfig refers to an in-tree defconfig file

[John Weber]

On 2/25/14, 4:10 PM, Eric Nelson wrote:
> Hi John,
>
> On 02/25/2014 02:29 PM, John Weber wrote:
>> I thought I would bounce this one of the mailing list.
>>
>> Is there any reason why we shouldn't simply use the defconfig from the
>> kernel tree if appropriate?
>>
>> We would do this by the defconfig file in the recipe refer to a filename
>> in the kernel tree. For example, in the file
>> recipes-kernel/linux/linux-wandboard-3.10.17/defconfig would be a single
>> line:
>>
>>     use-kernel-config=wandboard_defconfig
>>
>
> In general, +1 from our end.
>
> The primary down-side is that the Yocto needs may differ from other
> distributions, but then again, any particular user will likely
> want to tweak a bit anyway.
Well, I thought all was good with this little trick, but as it turns out that is 
not the case.

I saw this being done within meta-ti kernel recipes and thought it was pretty 
nifty, but each recipe includes this file:

https://git.yoctoproject.org/cgit/cgit.cgi/meta-ti/tree/recipes-kernel/linux/setup-defconfig.inc

So, this is a non-standard feature.  It would be nice to know what others think.

And, Otavio, I was too quick to be happy regarding our conversation today...  :-)

>
>> I've tested this already and it works.
>>
>> As many of the kernels being used here are managing their own defconfigs
>> in-tree, they are forced to keep the defconfig in the metadata in-sync.
> >
>> This would be a way to remove that requirement.
>> _______________________________________________
>> meta-freescale mailing list
>> meta-freescale@yoctoproject.org
>> https://lists.yoctoproject.org/listinfo/meta-freescale
>

Re: Using a defconfig refers to an in-tree defconfig file

[Otavio Salvador]

On Wed, Feb 26, 2014 at 2:37 AM, John Weber <rjohnweber@gmail.com> wrote:
>
> On 2/25/14, 4:10 PM, Eric Nelson wrote:
>>
>> Hi John,
>>
>> On 02/25/2014 02:29 PM, John Weber wrote:
>>>
>>> I thought I would bounce this one of the mailing list.
>>>
>>> Is there any reason why we shouldn't simply use the defconfig from the
>>> kernel tree if appropriate?
>>>
>>> We would do this by the defconfig file in the recipe refer to a filename
>>> in the kernel tree. For example, in the file
>>> recipes-kernel/linux/linux-wandboard-3.10.17/defconfig would be a single
>>> line:
>>>
>>>     use-kernel-config=wandboard_defconfig
>>>
>>
>> In general, +1 from our end.
>>
>> The primary down-side is that the Yocto needs may differ from other
>> distributions, but then again, any particular user will likely
>> want to tweak a bit anyway.
>
> Well, I thought all was good with this little trick, but as it turns out
> that is not the case.
>
> I saw this being done within meta-ti kernel recipes and thought it was
> pretty nifty, but each recipe includes this file:
>
> https://git.yoctoproject.org/cgit/cgit.cgi/meta-ti/tree/recipes-kernel/linux/setup-defconfig.inc
>
> So, this is a non-standard feature.  It would be nice to know what others
> think.
>
> And, Otavio, I was too quick to be happy regarding our conversation today...
> :-)

No problem :-)

Personally I don't like to add BSP specific features; I think we can
try to come up with a solution for it but we must work at OE-Core
basis and than use it here.

Having specific features makes harder for users to use the provided
documentation ...

My 2c...

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750