> (And if so, can I build [plan9port rc] and use it independent of the rest > of the tools?)
building it standalone will be hard, although you can reduce the surrounding source considerably, since it uses mainly or only lib9 (plan 9 libc). a little experiment suggests that once built, you might get by with only rc's executable and its rcmain. you'll need to change rcmain not to refer to $PLAN9/bin/9, but that needs only a little text editing.