Re: [PATCH] mesa: add PACKAGECONFIG_DISTRO variable for distro specific options

[Simon Busch <morphis@gravedo.de>]

Am 19.08.2013 18:58, schrieb 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.

Thank you very much for the good explanation.

regards,
Simon

-- 
Simon Busch - http://mm.gravedo.de/blog/