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Most distros do not ship with gl-enabled cairo, since doing so can result in libgl being linked to each cairo-using client, even if they don't actually use GL, and this can cause much larger per-client memory footprint, and thus can become a resource issue. Furthermore, while in theory this should work fine, we don't actively test this configuration, and there could be random undiscovered bugs if it's used. We keep the option available for people interested in helping us chase down those issues, but warn everyone else away.
Weston Weston is the reference implementation of a Wayland compositor, and a useful compositor in its own right. Weston has various backends that lets it run on Linux kernel modesetting and evdev input as well as under X11. Weston ships with a few example clients, from simple clients that demonstrate certain aspects of the protocol to more complete clients and a simplistic toolkit. There is also a quite capable terminal emulator (weston-terminal) and an toy/example desktop shell. Finally, weston also provides integration with the Xorg server and can pull X clients into the Wayland desktop and act as a X window manager. Refer to http://wayland.freedesktop.org/building.html for building weston and its dependencies. The test suite can be invoked via `make check`; see http://wayland.freedesktop.org/testing.html for additional details.