Merge pull request cc65#2500 from kugelfuhr/kugelfuhr/better-help-for-W

Improve the usage output for the '-W' option

doc/cc65.sgml

@@ -61,7 +61,7 @@ Short options:
   -Os                           Inline some standard functions
   -T                            Include source as comment
   -V                            Print the compiler version number
-  -W warning[,...]              Suppress warnings
+  -W [-+]warning[,...]          Control warnings ('-' disables, '+' enables)
   -d                            Debug mode
   -g                            Add debug info to object file
   -h                            Help (this text)
@@ -84,8 +84,9 @@ Long options:
   --create-full-dep name        Create a full make dependency file
   --data-name seg               Set the name of the DATA segment
   --debug                       Debug mode
+  --debug-tables name           Write symbol table debug info to a file
   --debug-info                  Add debug info to object file
-  --debug-opt name              Configure optimizations with a file
+  --debug-opt name              Debug optimization steps
   --debug-opt-output            Debug output of each optimization step
   --dep-target target           Use this dependency target
   --disable-opt name            Disable an optimization step

src/cc65/main.c

@@ -91,7 +91,7 @@ static void Usage (void)
             "  -Os\t\t\t\tInline some standard functions\n"
             "  -T\t\t\t\tInclude source as comment\n"
             "  -V\t\t\t\tPrint the compiler version number\n"
-            "  -W warning[,...]\t\tSuppress warnings\n"
+            "  -W [-+]warning[,...]\t\tControl warnings ('-' disables, '+' enables)\n"
             "  -d\t\t\t\tDebug mode\n"
             "  -g\t\t\t\tAdd debug info to object file\n"
             "  -h\t\t\t\tHelp (this text)\n"