[yocto] How to temporarily disable a package rebuild during an image build?
Alex J Lennon
ajlennon at dynamicdevices.co.uk
Thu Jan 30 16:00:30 PST 2014
On 30/01/2014 23:54, Adam Lee wrote:
> Hi Alex, so are you bitbaking the entire image every time you make a
> change to the kernel (The .bb file you linked is the image recipe)?
> If you only build the kernel (ie bitbake virtual/kernel), your system
> shouldn't build the entire image.
>
> Let me know!
>
That's exactly right Adam. I'm bitbaking an SD card image, writing that
to a uSD card and booting it up :)
In theory that should result in the kernel rebuild and a nice image for
me to use.
In actuality numbers of other things seem to decide they need to be
rebuilt, which doesn't appear to be too much of a time-sink,
excepting for QT4
> Adam
>
>
> On Thu, Jan 30, 2014 at 3:11 PM, Alex J Lennon
> <ajlennon at dynamicdevices.co.uk <mailto:ajlennon at dynamicdevices.co.uk>>
> wrote:
>
> Hi Adam,
>
>
> On 30/01/2014 18:40, Adam Lee wrote:
>> I am not sure if that's the correct behaviour at all. If you are
>> building the kernel, it should only build the kernel (and its deps).
>> How are you building it? I suppose you are doing 'bitbake
>> virtual/kernel', but just checking!
>>
>
> I'm building an image for test, based on fsl-image-gui out of
> meta-fsl-arm.
>
> It looks like that fsl image pulls in qt4 -
>
> https://github.com/Freescale/meta-fsl-demos/blob/master/recipes-fsl/images/fsl-image-gui.bb
>
> I don't quite understand why qt4 is rebuilding but if I had to
> guess perhaps it's got a dependency on framebuffer support or
> something.
>
> I could probably go in and change the image recipes if I really
> had to, but I'd rather leave them as is, assuming correctness of
> dependencies,
> I'd rather change an environment variable during my debug cycle to
> temporarily contrain rebuilding of packages that I know don't need to
> be rebuilt, so things revert to "correct" when I'm finished
> porting the kernel
>
> Cheers,
>
> Alex
>
>
>
>> Adam
>>
>>
>> On Wed, Jan 29, 2014 at 12:09 PM, Alex J Lennon
>> <ajlennon at dynamicdevices.co.uk
>> <mailto:ajlennon at dynamicdevices.co.uk>> wrote:
>>
>> Hi,
>>
>> I was wondering if there's a per-package environment variable
>> I could
>> use to contrain the rebuilding of packages?
>>
>> i.e. I am modifying a linux-imx kernel, rebuilding that
>> kernel package
>> and then generating an output filesystem image to boot from
>> an SD card
>> for testing.
>>
>> Each time I modify linux-imx I am finding that qt4 does a
>> rebuild.
>>
>> So whilst I'm making changes to linux-imx for test I'd rather
>> that q4
>> didn't rebuild when I build the image, and was wondering if
>> there's a
>> way to prevent that?
>>
>> (I could, I suppose, move to a testing model that didn't use a
>> completely rebuilt SD card image but I like this approach as
>> if it
>> works, well, it works, and I can distribute. Perhaps there's
>> a better way?)
>>
>> Thanks,
>>
>> Alex
>>
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>
> --
>
> Dynamic Devices Ltd <http://www.dynamicdevices.co.uk/>
>
> Alex J Lennon / Director
> 1 Queensway, Liverpool L22 4RA
>
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