--- ray/src/rt/rcmain.c	2020/09/09 21:28:19	2.19
+++ ray/src/rt/rcmain.c	2022/10/19 23:10:34	2.23
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rcmain.c,v 2.19 2020/09/09 21:28:19 greg Exp $";
+static const char	RCSid[] = "$Id: rcmain.c,v 2.23 2022/10/19 23:10:34 greg Exp $";
 #endif
 /*
  *  rcmain.c - main for rtcontrib ray contribution tracer
@@ -45,13 +45,24 @@ int	lim_dist = 0;			/* limit distance? */
 
 int	report_intvl = 0;		/* reporting interval (seconds) */
 
-const char	*modname[MAXMODLIST];	/* ordered modifier name list */
-int		nmods = 0;		/* number of modifiers */
+char	**modname = NULL;		/* ordered modifier name list */
+int	nmods = 0;			/* number of modifiers */
+int	modasiz = 0;			/* allocated modifier array size */
 
 void	(*addobjnotify[8])() = {ambnotify, NULL};
 
 char	RCCONTEXT[] = "RC.";		/* our special evaluation context */
 
+#if defined(_WIN32) || defined(_WIN64)
+#define RCONTRIB_FEATURES	"Accumulation\nSummation\nRecovery\n" \
+				"ValueContribution\nImmediateIrradiance\n" \
+				"ProgressReporting\nDistanceLimiting\n"
+#else
+#define RCONTRIB_FEATURES	"Multiprocessing\n" \
+				"Accumulation\nSummation\nRecovery\n" \
+				"ValueContribution\nImmediateIrradiance\n" \
+				"ProgressReporting\nDistanceLimiting\n"
+#endif
 
 static void
 printdefaults(void)			/* print default values to stdout */
@@ -182,12 +193,16 @@ main(int argc, char *argv[])
 	progname = argv[0] = fixargv0(argv[0]);
 	gargv = argv;
 	gargc = argc;
+					/* feature check only? */
+	strcat(RFeatureList, RCONTRIB_FEATURES);
+	if (!strcmp(argv[1], "-features"))
+		return feature_status(argc-2, argv+2);
 #if defined(_WIN32) || defined(_WIN64)
 	_setmaxstdio(2048);		/* increase file limit to maximum */
 #endif
 					/* initialize calcomp routines early */
 	initfunc();
-	setcontext(RCCONTEXT);
+	calcontext(RCCONTEXT);
 					/* option city */
 	for (i = 1; i < argc; i++) {
 						/* expand arguments */