> > > > What is SIGSTSP ???? it's not even in my /usr/include/sys/signal.h This, and your other undefined symbols, are a part of the standard 4.2BSD system. It sounds like you are trying to compile a program written for 4.2BSD on a non-4.2BSD system. If the program really makes serious use of this stuff, you are going to be S.O.L. --Greg