[Buildroot] [PATCH 1/1] package/mesa3d: reorder platforms to fix EGL

Peter Korsgaard peter at korsgaard.com
Tue May 26 09:21:33 UTC 2020

>>>>> "Joseph" == Joseph Kogut <joseph.kogut at gmail.com> writes:

 > Mesa chooses the first platform specified in -Dplatforms as the default
 > EGL native platform. [0]

 >     Configure Options

 >     -D platforms=...
 >         List the platforms (window systems) to support. Its argument is
 >         a comma separated string such as -D platforms=x11,drm. It
 >         decides the platforms a driver may support. The first listed
 >         platform is also used by the main library to decide the native
 >         platform.

 > This has the effect of breaking EGL applications running on X11 and
 > possibly Wayland when the first platform specified isn't x11 or wayland,
 > and EGL_PLATFORM isn't set.

 > Reorder the specified platforms to use x11, wayland, and drm before
 > surfaceless, as this is the order chosen by other common distributions,
 > such as Arch Linux [1], Debian [2], and Fedora [3].

 > Users preferring drm or surfaceless over x11 or wayland likely know how
 > to override the native EGL platform, and likely have x11 and wayland
 > disabled anyway.

 > [0] https://www.mesa3d.org/egl.html
 > [1] https://git.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/mesa#n45
 > [2] https://salsa.debian.org/xorg-team/lib/mesa/-/blob/fb8c1efb57ea8106525ed01c41218164f8be7f3b/debian/rules#L38
 > [3] https://src.fedoraproject.org/rpms/mesa/blob/master/f/mesa.spec#_337

 > Signed-off-by: Joseph Kogut <joseph.kogut at gmail.com>
 > ---

 > This is a follow up to a previous email I sent the mailing list [0] about
 > broken EGL apps when using mesa3d with x11.

 > I discovered the cause of this issue is the ordering of platforms when
 > building mesa3d, making surfaceless the default native platform.

 > I suggested adding a config to specify the default native platform, but
 > after further review, I believe that simply reordering the enabled
 > platforms should be adequate.

 > [0] http://buildroot-busybox.2317881.n4.nabble.com/mesa3d-builds-with-ES2-report-no-ES2-enabled-EGL-configs-td255778.html

Committed to 2020.02.x, thanks.

Bye, Peter Korsgaard

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