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From: Paul Eggleton <paul.eggleton@linux.intel.com>
To: Khem Raj <raj.khem@gmail.com>
Date: Tue, 22 Oct 2013 06:13:46 +0100
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Subject: Re: Using the correct "xserver-xf86-config_0.1.bbappend
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On Monday 21 October 2013 13:21:07 Khem Raj wrote:
> On Mon, Oct 21, 2013 at 9:30 AM, Ulf Samuelsson
> <openembedded-core@emagii.com> wrote:
> > Trying to build a systemd-gnome-image raspberrypi under Angstrom, with a
> > few extra layers.
> > 
> > This fails on "xserver-xf86-config_0.1.[bb|bbappend]"
> > 
> > The extra layer has BBPRIORITY = 20.
> > meta-beagleboard has BBPRIORITY = 8
> > meta-raspberrypi has BBPRIORITY = 6 (later changed to 120)
> > 
> > BBLAYERS are in the order meta-<extra layer> meta-beagleboard
> > meta-raspberrypi
> > 
> > It looks like bitbake will select the bbappend in the layer with the
> > highest priority,
> 
> Not really. All bbappends are selected the order or sequence of them
> is governed by how the layers line up in BBPATH

All bbappends for a recipe will be applied, in ascending layer priority order; 
BBPATH doesn't come into it.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre