diff -r 26cb3fa00d29 -r c7219a37cc39 stage1_2/stage1_2.cc
--- a/stage1_2/stage1_2.cc	Thu Nov 15 17:30:35 2012 +0100
+++ b/stage1_2/stage1_2.cc	Fri Nov 16 10:26:23 2012 +0100
@@ -66,15 +66,22 @@
 
 
 /******************************************************/
-/* whether we are suporting safe extensions           */
+/* whether we are supporting safe extensions          */
 /* as defined in PLCopen - Technical Committee 5      */
 /* Safety Software Technical Specification,           */
 /* Part 1: Concepts and Function Blocks,              */
-/* Version 1.0 – Official Release                     */
+/* Version 1.0 – Official Release                   */
 /******************************************************/
 bool safe_extensions_ = false;
 bool get_opt_safe_extensions() {return safe_extensions_;}
 
+/******************************************************/
+/* whether we are supporting conversion functions     */
+/* for enumerate data types                           */
+/******************************************************/
+bool conversion_functions_ = false;
+
+
 /****************************************************/
 /* Controlling the entry to the body_state in flex. */
 /****************************************************/
@@ -304,10 +311,14 @@
        */
 
   safe_extensions_ = options.safe_extensions;
+  conversion_functions_ = options.conversion_functions;
   int ret = stage2__(filename, options.includedir, tree_root_ref, options.full_token_loc);
-  derived_conversion_functions_c derived_conversion_functions(*tree_root_ref);
-  std::string source_code = derived_conversion_functions.get_declaration(*tree_root_ref);
-  ret = sstage2__(source_code.c_str(), tree_root_ref, false);
+
+  if (conversion_functions_) {
+	  derived_conversion_functions_c derived_conversion_functions(*tree_root_ref);
+	  std::string source_code = derived_conversion_functions.get_declaration(*tree_root_ref);
+	  ret = sstage2__(source_code.c_str(), tree_root_ref, false);
+  }
   return ret;
 }