>> On Wed, Mar 25, 2020 at 01:14:47PM -0500, Mark Hatle wrote:
>>> Trying to build mesa-gl without X11 enabled, results in numerous errors
>>> about being incorrectly configured, such as:
>>>
>>>   ERROR: Problem encountered: building dri drivers require at least one
>>> windowing system or classic osmesa
>>>
>>> After consulting with the author of this recipe, it was clear that it
>>> was only intended for the X11 use-case, so requring X11 should avoid
>>> the
>>> error message above.
>>
>> Hmm. That's not good. There are embedded devices that provide EGL/GLES
>> support
>> through own stack, but fall back on MESA for full desktop GL support.
>> That's
>> been working to some extent even with Wayland and w/o X11. With your
>> change
>> that won't be possible any more...
>
>
> Have you tried any of these?  This hasn't been working since Zeus with an
> external libmali and non-X11 configuration.  It returns the error listed
> in the commit message "ERROR: Problem encountered: building dri drivers
> require at least one windowing system or classic osmesa" during
> configuration.
>
> Ross and I talked about it and he said this was specific to X11
> implementation and wasn't meant to work for other implementations.
> (fbdev/QT/etc.)
>
> If Wayland is supposed to work, then someone needs to go in and adjust the
> configuration to also support Wayland.  I don't have any Wayland systems
> to even know what the right configuration COULD be.
>
> The specific configuration I'm running has "OpenGL" in the DISTRO_FEATURE,
> but does NOT have X11 or Wayland".
>
> DISTRO_FEATURES_append = " opengl"
> DISTRO_FEATURES_remove = "x11 wayland"

This can be further refined to:

conf/local.conf:

PREFERRED_PROVIDER_virtual/libgl = "mesa-gl"
PREFERRED_PROVIDER_virtual/mesa = "mesa-gl"
DISTRO_FEATURES_append = " opengl"
DISTRO_FEATURES_remove = "x11"

bitbake mesa-gl

Error is the same:

meson.build:455:4: ERROR: Problem encountered: building dri drivers
require at least one windowing system or classic osmesa

> --Mark
>
>> --
>> Denys
>>
>>
>>> Signed-off-by: Mark Hatle <mark.ha...@kernel.crashing.org>
>>> ---
>>>  meta/recipes-graphics/mesa/mesa-gl_20.0.1.bb | 6 ++++--
>>>  1 file changed, 4 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/meta/recipes-graphics/mesa/mesa-gl_20.0.1.bb
>>> b/meta/recipes-graphics/mesa/mesa-gl_20.0.1.bb
>>> index d4b1c1c454..5674c6b1fe 100644
>>> --- a/meta/recipes-graphics/mesa/mesa-gl_20.0.1.bb
>>> +++ b/meta/recipes-graphics/mesa/mesa-gl_20.0.1.bb
>>> @@ -6,5 +6,7 @@ PROVIDES = "virtual/libgl virtual/mesa"
>>>
>>>  S = "${WORKDIR}/mesa-${PV}"
>>>
>>> -PACKAGECONFIG ??= "opengl dri ${@bb.utils.filter('DISTRO_FEATURES',
>>> 'x11', d)}"
>>> -PACKAGECONFIG_class-target = "opengl dri
>>> ${@bb.utils.filter('DISTRO_FEATURES', 'x11', d)}"
>>> +REQUIRED_DISTRO_FEATURE = "x11"
>>> +
>>> +PACKAGECONFIG ??= "opengl dri x11"
>>> +PACKAGECONFIG_class-target = "opengl dri x11"
>>> --
>>> 2.17.1
>>>
>>
>>>
>>
>
> 
>

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