Error when trying to combine X11 with Weston in ecosystem release v4.0.0

[SLivi.1]

In trying to provide X11 support to a Weston distribution, I modified the weston distro conf (meta-st-openstlinux/conf/distro/openstlinux-weston.conf) to read:

#DISTRO_FEATURES:remove = " x11 "
# with X11
PREFERRED_PROVIDER_virtual/xserver = "${@bb.utils.contains('DISTRO_FEATURES', 'x11 wayland', 'xwayland', 'xserver-xorg', d)}"

This appropriately builds the X11 libraries needed, but I get a configuration error for the mesa-gl package:

| ../mesa-22.0.0/meson.build:555:6: ERROR: Problem encountered: xlib based GLX requires at least one gallium driver

It looks like the invocation of meson does not pass the right value for gallium-drivers even though the environment does imply it should be set appropriately.

The do_configure log file contains "-Dgallium-drivers=":

NOTE: Executing meson -Dshared-glapi=enabled -Dglx-read-only-text=true -Dplatforms=x11 -Ddri3=disabled -Degl=disabled -Delf-tls=false -Dgallium-drivers= -Dllvm=disabled -Dgbm=disabled -Dgles1=disabled -Dgles2=disabled -Dlmsensors=disabled -Dgallium-opencl=disabled -Dopencl-spirv=false -Dopengl=true -Dosmesa=false -Dlibunwind=disabled -Dgallium-va=disabled -Dgallium-vdpau=disabled -Dvulkan-drivers= -Dgallium-xa=disabled -Dgallium-xvmc=disabled...

The bitbake environment seems to set the drivers correctly:

$ bitbake -e mesa-gl | grep ^GALLIUM
GALLIUMDRIVERS="swrast"
GALLIUMDRIVERS:x86-x32=""
GALLIUMDRIVERS_LLVM="r300,nouveau"
GALLIUMDRIVERS_RADEONSI=""

We are building with our own Distro and Machine definitions, but I went back to the original STM32MP Distro package and get the same results.

Any thoughts? Am I missing something?

[SLivi.1]

A workaround is to provide the following line in the mesa-gl_%.bbappend:

PACKAGECONFIG:class-target = "opengl x11 gallium"

The mesa-gl_22.0.3.bb recipe does not seem to provide gallium in PACKAGECONFIG when x11 is a distro feature.

PACKAGECONFIG:class-target = "opengl ${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'x11', 'osmesa gallium', d)}"

After getting past the mesa-gl config issue, I encountered an issue with xserver-xorg also at the do_configure task:

ERROR: Problem encountered: DRI3 requested, but xshmfence not found

This was resolved with a line in a new xserver-xorg_%.bbappend:

DEPENDS:append = " libxshmfence"

I got the image built but this seems like I must be missing some more fundamental distro or image feature.

[A.M.]

In my case, I added libxshmfence to "layers/openembedded-core/meta/recipes-graphics/xorg-xserver/xserver-xorg_21.1.4.bb". And had no mesa-gl_22.0.3.bb to modify.

Thanks for this helpful message.