[oe] understanding overlays

[Khem Raj]

On Thursday, July 28, 2011 07:48:43 AM Steffen Sledz wrote:
> On 27.07.2011 18:12, Chris Larson wrote:
> > 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.
> 
> Thx. What about files referenced e.g. in SRC_URI? I assume that always the
> ones from the 'highest' layer are used. Right?

It will consider the BBFILE_PRIORITY for recipe files. but .inc and other 
metadata are searched in order of paths in BBPATH

-- 
Khem Raj