[yocto] How to modify a meta third party layer sources from my custom layer

[Anuj Mittal]

On 05/14/2018 04:58 AM, Stefano Cappa wrote:
> Hello everyone, 
> I'm new to yocto so please don't kill me :). I have a question, probably
> very stupid and simple, but I'm really don't know how to understand this
> so I'm trying to ask to the cummunity.
> 
> I'm using Yocto 2.4 for an hardware with meta-freescale layer to support it.
> However I have to apply some changes. I'm able to build if I
> modify/overwrite and delete some files by myself, but when I try to use
> a custom layer to do that I cannot build, because obviously I don't know
> what I should do.
> 
> My custom layer applies some patches to work and work-shared dirs and
> everything is ok, but I don't understand how to add files and changes to
> my layer to modify meta-freescale sources.
> 
> I can create a fork of that layer, but I prefer to add all changes to my
> layer.
> In particular I need to add some .inc, .bb files into
> /recipes-bsp/u-boot/ of meta-freescale and a folder with some files and
> patches taken from poky/meta/..../u-boot/
> like u-boot-fw-utils-imx_2017.09.bb
> <http://u-boot-fw-utils-imx_2017.09.bb> and u-boot-common_2017.09.inc
> 
> How can I do this from a custom layer? Which is the right procedure?
> 
> Custom layers can modify only work and work-shared dirs content or also
> other layer sources, because that they are executed?
> 

Please take a look at:
https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#prioritizing-your-layer

and the sections around it, and see if that answers your question.