NNTP/RRN help needed

[The Ancient Programmer]

I previously posted this "Request for Assistance" in news.software.nntp
and received a couple of replies which said: "It worked fine for me."  So
I got new versions of nntp.1.5 and rrn.39 from Berkeley's anonymous ftp
and tried again with the same results!  Does anyone have any idea why I am
getting these results while others seem to be having no problem with the
same code?

	Trying to install NNTP.1.5 & RRN.39 on a Sun 3 under OS 4.0.1.
Problem #1: In RRN.39, Configure requires that response_codes.h be in the
		nntp/common source directory, and in the distribution it is not
		there. Getting past that -

Problem #2: In util.c, signal is defined as:
		         int (*signal())();
	    while in /usr/include/signal.h signal is defined as:
			void    (*signal())();

	   This leads to an error during make of:
|"util.c", line 36: redeclaration of signal
|"util.c", line 64: warning: illegal pointer combination
|"util.c", line 65: warning: illegal pointer combination
|*** Error code 1
|make: Fatal error: Command failed for target `util.o'

Problem #3: If I blunder past that problem by changing signal to void
		in util.c, I encounter the following:
|make: Fatal error: Don't know how to make target `getactive.o'

Has anyone else encountered these problems? If people have successfully
gotten NNTP1.5/RNN39 working on Suns running SUNOS 4.0.1, what is
different about my system? It is a vanilla SUNOS 4.0.1!

Any help gratefully accepted.  Thanks in advance.