maintainer-feedback requested: [Bug 232778] graphics/mesa-libs: Enable xatracker

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Bug 232778: graphics/mesa-libs: Enable xatracker
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232778



--- Description ---
In preparation for vmwgfx, the drm kernel driver for vmware graphics, we need
to have mesa produce the XA tracker (a shared library and some header files).

xf86-video-vmware will autodetect these files during build and enable kms and
drm support. If the kernel module, vmwgfx, is not loaded at runtime,
xf86-video-vmware will fallback to software rendering (tested) so nothing
should break for non-kms users.

libxatracker.so is both build and runtime dependency to xf86-video-vmware.

Adding

CONFIGURE_ARGS+= --enable-xa

to mesa-libs/Makefile should be sufficient (and modify dependencies as needed).