[OE-core] [PATCH] mesa: add PACKAGECONFIG_DISTRO variable for distro specific options

[Paul Eggleton]

On Monday 19 August 2013 18:28:02 Simon Busch wrote:
> Am 19.08.2013 18:09, schrieb Phil Blundell:
> > On Mon, 2013-08-19 at 18:04 +0200, Simon Busch wrote:
> >> In some cases as distribution just wants to extend the default
> >> PACKAGECONFIG instead of rewriting it completely. Therefor having a
> >> PACKAGECONFIG_DISTRO variable which is empty by default and included in
> >> PACKAGECONFIG helps a lot.
> > 
> > Can't those distros just use PACKAGECONFIG_append?
> 
> They can. I tried with PACKAGECONFIG += which didn't worked and I
> thought it would be the same with PACKAGECONFIG_append cause of
> PACKAGECONFIG being weak assignment in mesa.inc. But as it seems +=
> takes higher than the weak assignment and overrides PACKAGECONFIG where
> _append only appends.

It's being set in the recipe with ??= which is the weakest form of assignment, 
so this behaviour is expected. I just tested this in local.conf and it works:

PACKAGECONFIG_append_pn-mesa = " something"

BTW, outside of a recipe (or bbappend) you should always use a pn- override 
with PACKAGECONFIG or you'll be affecting more than just the recipe you intend 
to.

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre