[meta-ti] [PATCH] adjust BBPATH to be a good citizen of layer world

[Denys Dmytriyenko]

On Thu, Nov 07, 2013 at 09:15:40AM -0800, Khem Raj wrote:
> 
> On Nov 7, 2013, at 8:59 AM, Denys Dmytriyenko <denys at ti.com> wrote:
> 
> > On Wed, Nov 06, 2013 at 08:55:55PM -0800, Khem Raj wrote:
> >> On Wed, Nov 6, 2013 at 8:29 PM, Maupin, Chase <chase.maupin at ti.com> wrote:
> >>> This seems like a reversal of http://arago-project.org/git/meta-ti.git?a=commit;h=dabd83e96fe99d0c3d1a88be4d1637831526d217
> >>> 
> >>> Looks like there may be a need to cover the different use cases and 
> >>> understand what each person is trying to do :)
> >>> 
> >> 
> >> ah I see what caused this all pain. So now meta-ti is odd ball out.
> >> this patch should have never gone in.
> > 
> > Khem,
> > 
> > If you remember, we discussed this with Richard and he suggested this as a 
> > solution to the ordering problem. Otherwise people tend to append any extra 
> > layers _after_ oe-core, which should be the other way around in order to 
> > override anything in there…
> 
> I think the problem is when you have many other layers then the whole 
> paradigm changes to it and you end up with same issue upside down. I think 
> how you order bblayer.conf can control the override of oe-core, I wish if 
> distro’s could control the layer.conf for each bsp layer then it wouldnt 
> matter as much

I agree this is a bigger issue. I looked at some layers and found few that 
prepend themselves, while most of others just append.

The order inside bblayers.conf is much more important than people let to 
believe. For example, if multiple layers define the machine config, the first 
one listed in bblayers.conf wins - this is a real problem for beagleboard.conf 
that is currently being defined in meta-ti as well as meta-yocto-bsp (as a 
reference platform) and meta-beagleboard too. Very soon the same problem will 
happen to beaglebone.conf, when meta-yocto-bsp picks it up as a reference...

Anyway, the biggest issue I'm trying to work around with this change is the 
"shadowing" of the new-style DTBs that I ported from Dora to Dylan. If meta-ti 
is not in front of oe-core, the old-style DTBs come into play and DTBs are not 
built at all. So, this is not really an issue for Dora or master, and those 
don't need to be prepended after all...


> >>>> -----Original Message-----
> >>>> From: meta-ti-bounces at yoctoproject.org [mailto:meta-ti-
> >>>> bounces at yoctoproject.org] On Behalf Of Khem Raj
> >>>> Sent: Thursday, November 07, 2013 7:55 AM
> >>>> To: meta-ti at yoctoproject.org
> >>>> Subject: [meta-ti] [PATCH] adjust BBPATH to be a good citizen of
> >>>> layer world
> >>>> 
> >>>> Currently, meta-ti appears as first path in BBPATH
> >>>> rest of layers append so lets do the same
> >>>> 
> >>>> helps distros with multiple BSP layers to include meta-ti
> >>>> 
> >>>> Signed-off-by: Khem Raj <raj.khem at gmail.com>
> >>>> ---
> >>>> conf/layer.conf | 2 +-
> >>>> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>>> 
> >>>> diff --git a/conf/layer.conf b/conf/layer.conf
> >>>> index e39bd85..faa4ac0 100644
> >>>> --- a/conf/layer.conf
> >>>> +++ b/conf/layer.conf
> >>>> @@ -1,5 +1,5 @@
> >>>> # We have a conf and classes directory, append to BBPATH
> >>>> -BBPATH =. "${LAYERDIR}:"
> >>>> +BBPATH .= ":${LAYERDIR}"
> >>>> 
> >>>> # We have a recipes directory, add to BBFILES
> >>>> BBFILES += "${LAYERDIR}/recipes*/*/*.bb
> >>>> ${LAYERDIR}/recipes*/*/*.bbappend"
> >>>> --
> >>>> 1.8.3.2
> >>>> 
> >>>> _______________________________________________
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> >>>> meta-ti at yoctoproject.org
> >>>> https://lists.yoctoproject.org/listinfo/meta-ti
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