Thanks for the idea of using BBPATH.

my change is kind of custom and I don't think someone else will make use of
it.


Cheers

On Tue, May 26, 2020 at 4:42 PM Quentin Schulz <
quentin.schulz@streamunlimited.com> wrote:

> Hi Ayoub,
>
> On Tue, May 26, 2020 at 04:36:13PM +0200, Ayoub Zaki via
> lists.yoctoproject.org wrote:
> > Hi,
> >
> > I would like to make changes on systemd.bblcass in my layer.
> >
> > I can create new one e.g my-systemd.bbclass to overwrite the default one
> > but this will not work since I want that ALL recipes in all layers I'm
> > using to make usage of it.
> >
> > are there ways to achieve this?
> >
>
> BBPATH[1] is what's used to locate bbclasses. It's defined in your
> conf/layer.conf.
>
> You can either make sure your layer is parsed before the one having the
> original systemd.bbclass (in BBLAYERS of conf/bblayers.conf) or prepend
> to BBPATH instead of appending.
>
> Although... It's usually bad practice because it means that if I were to
> use
> two layers doing the same thing (overriding the same bbclass), the behavior
> is kind of undefined depending on which order they are parsed.
>
> Ideally, you should contribute back the modifications to upstream
> systemd.bbclass, that way, no need to duplicate it and override it from
> somewhere else.
>
> [1]
> https://www.yoctoproject.org/docs/current/mega-manual/mega-manual.html#var-BBPATH
>
> Cheers,
> Quentin
>