[oe] [PATCH (v2)] Reverse the order of OVERRIDES

[Chris Larson]

On Fri, Oct 15, 2010 at 12:37 PM, Koen Kooi <k.kooi at student.utwente.nl>wrote:

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> On 15-10-10 17:41, Chris Larson wrote:
> > From: Chris Larson <chris_larson at mentor.com>
> >
> > Given the current implementation of OVERRIDES in bitbake, the variable is
> > expected to contain elements in the order least specific to most
> specific,
> > however, our current usage of it does not match that.  As one example,
> "local"
> > is supposed to always be the most specific override, yet currently it's
> the
> > least specific.  As another example, currently the target architecture is
> seen
> > as more specific than the machine, which is also clearly wrong.
> >
> > Big thanks to Chase Maupin for investigating and identifying this long
> > standing issue.
> >
> > It becomes clear that a reversal of the current value will bring us to a
> more
> > sane behavior, and avoids the need for the dual overrides hack mentioned
> in
> > the comments, so this implements this reversal, and drops the unnecessary
> and
> > confusing comments.
> >
> > This also introduces a MACHINE_OVERRIDES variable as a generic mechanism
> to
> > inject overrides elements which are more specific than the distro but
> less
> > specific than the machine, which is where things like MACHINE_CLASS or
> > SOC_FAMILY or the like would go.  This variable is *space* separated, to
> make
> > it easier and more convenient to assemble the variable incrementally.
> >
> > Reported-by: Chase Maupin <chase.maupin at ti.com>
> > Signed-off-by: Chris Larson <chris_larson at mentor.com>
>
> Acked-by: Koen Kooi <k-kooi at ti.com>
>

This is now in master -- thanks to all for the acks, review, comments -- let
me know if any problems result from this.
-- 
Christopher Larson
clarson at kergoth dot com
Founder - BitBake, OpenEmbedded, OpenZaurus
Maintainer - Tslib
Senior Software Engineer, Mentor Graphics