damonp@daemon.UUCP (Damon Permezel) (06/04/84)
What I have eventually come up with is the following. I am
not entirely satisfied with it, but it works ok. I tried the
# define extern route, but was unable to provide initialisers.
===extern.h=====
/*
* common external definitions
*/
#define EXTERN_IT
#include "extern.c"
====extern.c====
/*
* external definitions
*/
#ifndef EXTERN_IT
# include "dclass.h"
# undef ev
# define ev(type, var, init) type var = init
#else
# undef ev
# define ev(type, var, init) extern type var
#endif
ev(char *, usage, "dclass {Machine=<mach> | [Class=]<class>}");
ev(char *, mach, 0); /* desired machine */
ev(char, home[MAX_PATH+1], 0); /* home directory */
ev(char, verbose, 0); /* verbose flag */