[yocto] Keeping and modifying Source code in Yocto

[Khem Raj]

On Wed, Jul 11, 2018 at 9:28 AM Simon Chamlian <simon.chamlian at mpbc.ca> wrote:
>
> I am getting the following error using devtool:
>
> $ devtool add help
> ERROR: Layer directory '/home/jay/sources/poky/meta' does not exist! Please check BBLAYERS in /home/jay/build/conf/bblayers.conf
>
> $ whereis devtool
> devtool: /opt/PHYTEC_BSPs/yocto_imx7/sources/poky/scripts/devtool
>
> The paths are completely wrong.
>
> Any hints?

may be there are two different workspaces being mixed here. Probably
you should start a fresh shell and setup
environment to run bitbake and then be able to run devtool in that
shell as well.

>
> Thanks,
> S
>
>
>
>
>
>
> On Tue, Jul 10, 2018 at 4:27 AM, ChenQi <Qi.Chen at windriver.com> wrote:
>>
>> On 07/10/2018 02:18 PM, Paul Eggleton wrote:
>>>
>>> On Tuesday, 10 July 2018 3:32:56 AM CEST ChenQi wrote:
>>>>
>>>> I usually use the following steps when I need to modify source for some
>>>> purpose.
>>>>
>>>> 1. bitbake A (or at least bitbake A -c configure)
>>>> *2. cd tmp/work/xxxxx/A/<source dir>**
>>>> **3. make the modification*
>>>> 4. bitbake A -c compile -f
>>>> 5. bitbake A
>>>>
>>>> If you find the modification useful, make a patch from it.
>>>
>>> This is the old way of doing it which can under some circumstances result in
>>> you losing your changes to the source tree, since the sources under tmp/work/
>>> are only ever intended to be there temporarily. Devtool (as recommend by
>>> others on this thread) is designed to enable this workflow in a much safer
>>> manner.
>>>
>>> Cheers,
>>> Paul
>>>
>> Thanks Paul. I'll turn to use devtool.
>>
>> Best Regards,
>>
>> Chen Qi
>>
>
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