Compile all sources in a Lisp target OBJ.
Insert rules needed by THIS target.
t if object THIS lays claim to the file in BUFFER.
Lays claim to all -by.el, and -wy.el files.
Return the variable name for THIS’s sources.
Insert dist dependencies, or intermediate targets. This makes sure that all grammar lisp files are created before the dist runs, so they are always up to date. Argument THIS is the target that should insert stuff.