Possible arguments: app, data, doc, driver, font, lib, proto, util, xserver and (none) or one off autotools (default), meson

Provide support for building Xorg components. It takes care of setting up common dependencies and an appropriate configuration environment needed. This is intended only for Xorg components.

The category has to match upstream categories.

The second argument is the build system to use. autotools is the default, but meson is also supported.