Add -V version flag

src/unroff.c

@@ -25,6 +25,10 @@ const char *get_version_string(void) {
     return buf;
 }
 
+static void version(void) {
+    printf("unroff %s\n", get_version_string());
+}
+
 static void usage(void) {
     fprintf(stderr, "Usage: %s [options] [file...]\n\n", get_progname());
     fprintf(stderr, "  -mname      name of troff macro package (e.g. -ms)\n");
@@ -166,16 +170,20 @@ int main(int ac, char **av) {
     eav = safe_malloc((ac+3+1) * sizeof(char *));
     eav[0] = av[0];
     opterr = 0;
-    while ((c = getopt(ac, av, "h:gm:f:tC")) != EOF) {
+    while ((c = getopt(ac, av, "h:gm:f:tCV")) != EOF) {
 	switch (c) {
 	case 'g':
 	    eav[eac++] = "-g"; break;
 	case 'h':
+            /* Unroff help flag */
 	    if (strcmp(optarg, "elp") == 0) {
 		usage();
 		return 1;
 	    }
-	    eav[eac++] = "-h"; eav[eac++] = optarg; break;
+            /* Elk heap size flag */
+	    eav[eac++] = "-h";
+            eav[eac++] = optarg;
+            break;
 	case 'm':
 	    macros = optarg; break;
 	case 'f':
@@ -184,6 +192,9 @@ int main(int ac, char **av) {
 	    tflag = 1; break;
 	case 'C':
 	    compatible = 1; break;
+	case 'V':
+	    version();
+            return 0;
 	case '?':
 	    usage();
 	    return 1;