[oe] understanding overlays

[Chris Larson]

On Wed, Jul 27, 2011 at 7:24 AM, Steffen Sledz <sledz at dresearch-fe.de> wrote:
> I'm not really familiar with the oe/bitbake overlay details. So please forgive me if this is a faq. ;-)
>
> Is the overlay package or file based?
>
> Or in other words is the following scenario possible?
>
> base layer:
>
>  recipes/
>    foo/
>      foo.inc
>      foo_x.y.z.bb
>
> overlay:
>
>  recipes/
>    foo/
>      foo.inc
>
> And than build foo-x.y.z with the foo.inc from the overlay.

That depends. If the .bb does 'require foo.inc', then no, it will use
the local one. If it does 'require recipes/foo/foo.inc', then yes, it
will use the overlay one, assuming the overlay is before the main
layer in your BBLAYERS.
-- 
Christopher Larson
clarson at kergoth dot com
Founder - BitBake, OpenEmbedded, OpenZaurus
Maintainer - Tslib
Senior Software Engineer, Mentor Graphics