Re: Correct way to set DRIDRIVERS and GALLIUMDRIVERS from mesa bbappend

[Mike Crowe <mac@mcrowe.com>]

On Wednesday 01 December 2021 at 14:18:19 -0500, Justin Bronder wrote:
> On 01/12/21 16:43 +0000, Mike Crowe via lists.openembedded.org wrote:
> > I'm building for a specific chip and therefore don't wish to waste time and
> > electricity building and disk space on the target installing unwanted mesa
> > drivers. However, mesa.inc contains:
> > 
> >  GALLIUMDRIVERS = "swrast"
> >  GALLIUMDRIVERS:x86-x32 = ""
> >  GALLIUMDRIVERS:append:x86:class-target = ",i915,iris,crocus"
> >  GALLIUMDRIVERS:append:x86-64:class-target = ",i915,iris,crocus"
> > 
> > and mesa_21.3.0.bb contains:
> > 
> >  DRIDRIVERS ??= ""
> >  DRIDRIVERS:append:x86:class-target = ",r100,r200,nouveau,i965"
> >  DRIDRIVERS:append:x86-64:class-target = ",r100,r200,nouveau,i965"
> > 
> > I'm unable to find a way to override these values. Using (for example):
> 
> You can use an anonymous python function which runs after parsing.
> https://www.yoctoproject.org/docs/current/mega-manual/mega-manual.html#anonymous-python-functions
> 
>     python __anonymous () {
>         d.setVar("DRIDRIVERS", "i965")
>     }

Thanks for the suggestion. It solves my problem. However, it seems like
quite a subversive way to do the sort of external customisation that
recipes normally support.

Thanks.

Mike.