Added -Wxx messages to help

diff --git a/lib.c b/lib.c
index ad9ce7e05781862446be0f0bc32b497407f5ff13..1add87cf775ba88047d9804ae7010b1c4230f893 100755 (executable)
--- a/lib.c
+++ b/lib.c
@@ -140,6 +140,10 @@ static void print_usage (void) {
         fprintf (stderr, "\n");
         fprintf (stderr, "    -P                                Don't print linemarkers.\n");
         fprintf (stderr, "    -o OBJFILE                        Name the object-file output OBJFILE.\n");
+        fprintf (stderr, "\n");
+        fprintf (stderr, "    -Wall                            Enable most warning messages.\n");
+        fprintf (stderr, "    -Werror                          Treat all warnings as errors.\n");
+        fprintf (stderr, "    -Wextra                          Print extra (possibly unwanted) warnings.\n");
         
         fprintf (stderr, "\n");
         fprintf (stderr, "    --traditional-linemarker-format   Use #line instead of short form.\n");