XkbAllocKeyboard - Creates a keyboard description from scratch
Applications seldom need to directly allocate a keyboard description; calling
usually suffices. In the event you need to create a keyboard description from
scratch, however, use
rather than directly calling
fails to allocate the keyboard description, it returns NULL.
Otherwise, it returns a pointer to an empty keyboard description structure. The
field will have been initialized to XkbUseCoreKbd. You may then
either fill in the structure components or use Xkb functions to obtain values
for the structure components from a keyboard device.