TestDriver: Add '-N' option to print all tests

Templates/TestDriver.cxx.in

@@ -88,6 +88,7 @@ int main(int ac, char* av[])
 {
   int i;
   int testNum = 0;
+  int show_only;
   int partial_match;
   int run_all;
   char *arg;
@@ -117,14 +118,22 @@ int main(int ac, char* av[])
     ac--;
     av++;
   }
+  show_only = 0;
   partial_match = 0;
   run_all = 0;
   arg = CM_NULL; /* NOLINT */
   /* If partial match or running all tests are requested.  */
   if (testToRun == -1 && ac > 1) {
+    show_only = (strcmp(av[1], "-N") == 0) ? 1 : 0;
     partial_match = (strcmp(av[1], "-R") == 0) ? 1 : 0;
     run_all = (strcmp(av[1], "-A") == 0) ? 1 : 0;
   }
+  if (show_only == 1) {
+    for (i = 0; i < NumTests; ++i) {
+      printf("%s\n", cmakeGeneratedFunctionMapEntries[i].name);
+    }
+    return 0;
+  }
   if (partial_match != 0 && ac < 3) {
     printf("-R needs an additional parameter.\n");
     return -1;