Prep
 Find out how to get the C compile on your system to output the source
 code *after* macro expansion.  Some I have seen:
	/lib/cpp file.c
	/bin/cc -E file.c
	/usr/local/bin/gcc -E file.c


Compile
 Edit the Makefile to change where you want the calls program installed
 (change BIN).  Or set that on the mmsrc command-line (with -y).

 PATH_CPP can be -D'd to the local prefered C Pre-Processor.  So use
 the beginning of the way you found to make the C compiler output the
 source text after macro expansion (the text in quotes).

 should output a version string (send this when you report a bug):
	calls: $Id: calls.m ...

 Test it:
	$ mmsrc make graph | ${PAGER:-less}

Install
 Just use something like:
	# mmsrc -Cauto.cf make install
 or
	$ msrc -Csite.cf -Gsulaco.example.com -uroot make intall

 If you have mkcat use
	# mmsrc mkcat calls.man
 Else follow local custom for man pages.

Problems

 Contact me at calls at n0spam ksb.npcguild.org

--
ksb, Oct 2012