[OE-core] Create more than one image with WIC

[Daniel Schultz]

Am 08.03.2017 um 14:43 schrieb Ed Bartosh:
> On Wed, Mar 08, 2017 at 02:41:10PM +0100, Gary Thomas wrote:
>> On 2017-03-08 11:57, Ed Bartosh wrote:
>>> On Wed, Mar 08, 2017 at 10:44:21AM +0100, Daniel Schultz wrote:
>>>> Hi,
>>>>
>>>> I created two kickstart files (am335x-sdimage.wks, am335x-emmc.wks)
>>>> and added them to the local.conf.
>>>>
>>>> When I build the image only the first wks in WKS_FILES will be used
>>>> by WIC and the second will be ignored. Is it possible to build two
>>>> images in one build?
>>>>
>>>
>>> I don't think it's possible to build more than one image for the same
>>> type. wic is not an exception here.
>>>
>>>> Includes of the wks files in local.conf:
>>>> WKS_FILES_ti33x = "am335x-sdimage.wks am335x-emmc.wks "
>>>
>>> WKS_FILES variable is to provide possible wks files to use. First one found will
>>> be used to produce an image.
>>
>> Would it work to add/define this variable in the corresponding *image*.bb recipe
>> rather than local.conf?
>
> Yes, it would if image recipe is unique, i.e. images of the same type
> can be produced for different recipes.
>
But isn't wic different to other images like e.g. ext? I agree that 
there are other images that need only build once, but wic images can 
contain these and therefore act as a wrapper.

Do I have misunderstood the design of wic?

I mean MMC and EMMC are very similar, but different in the bootloader 
and it would be a overhead to create an extra image for all EMMC images.

-- 
Mit freundlichen Grüßen,
With best regards,
   Daniel Schultz

> WKS_FILES makes sense to set only if there are multiple wks files that
> can be used to produce an image. The most obvious use case is using
> multiple layers with different wks files in each and specifying all of
> them in WKS_FILES.
>
> If this is not the case then setting WKS_FILE is enough.
>
> --
> Regards,
> Ed
>