Sounds as if you're done. If ldrdf, rdf2com, etc. exist, you're done. Try "make clean" first. There are a flock of targets in the makefile - "make everything" and "make install_everything" seem to be the most extensive.
What are you building the rdoff stuff for? Are you using rdoff? (few do, AFAIK - pity...) Just curious...
If you determine that there really is something wrong with the makefile, get back to us, but that seems like "normal" output if it's "already been built"...
Best,
Frank