1 files changed, 6 insertions, 2 deletions
diff --git a/Source/cmGetDirectoryPropertyCommand.h b/Source/cmGetDirectoryPropertyCommand.h
index d7b2103..0befc65 100644
--- a/Source/cmGetDirectoryPropertyCommand.h
+++ b/Source/cmGetDirectoryPropertyCommand.h
@@ -52,12 +52,16 @@ public:
   virtual const char* GetFullDocumentation()
     {
       return
-        "  GET_DIRECTORY_PROPERTY(VAR property)\n"
+        "  GET_DIRECTORY_PROPERTY(VAR [DIRECTORY dir] property)\n"
         "Get a property from the Directory.  The value of the property is" 
         "stored in the variable VAR. If the property is not found,"
         "CMake will report an error. The properties include: VARIABLES, "
         "CACHE_VARIABLES, COMMANDS, MACROS, INCLUDE_DIRECTORIES, "
-        "LINK_DIRECTORIES, DEFINITIONS and INCLUDE_REGULAR_EXPRESSION.";
+        "LINK_DIRECTORIES, DEFINITIONS, INCLUDE_REGULAR_EXPRESSION and "
+        "DEFINITION varname.  If the DIRECTORY argument is provided then "
+        "the property of the provided directory will be retrieved "
+        "instead of the current directory. You can only get properties "
+        "of a directory during or after it has been traversed by cmake.";
     }
   
   cmTypeMacro(cmGetDirectoryPropertyCommand, cmCommand);