[yocto] When to create a new build directory for yocto?

[Qiang Yu]

What about MACHINE_FEATURES and IMAGE_FEATURES?


On Mon, Dec 1, 2014 at 1:28 PM, ChenQi <Qi.Chen at windriver.com> wrote:

>  On 12/01/2014 12:45 PM, Qiang Yu wrote:
>
>
>> It's possible that you are using (or might use) different layer
>> configurations for different builds.
>> One build might have a bbappend file that another build doesn't need.
>>
> Yes, you are right. I use different conf/bblayers.conf for different SOC.
> But within the same SOC's different output
> (board image, SDK), I just change MACHINE and SDKMACHINE. Is it safe to
> build all outputs of the same SOC
> in one build dir?
>
>
> Yes.
>
>
>
>>  Also, different builds may have different DISTRO_FEATURES.
>> Thus, having different deploy directories is better. Otherwise, your
>> package feeds might be broken. And you would suffer trying to maintain it.
>>
> You mean I can't build two output with different DISTRO_FEATURES in the
> same build dir.
> Any other config var? What about MACHINE and SDKMACHINE?
>
>
>
> Yocto doesn't ensure that changing distro features in the same build
> directory works.
> It might work, but it's also possible that it doesn't.
>
> Changing MACHINE and SDKMACHINE is OK.
>
> //Chen Qi
>
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