diff -r 76175defb87b -r 1f2af384fb1f main.hh
--- a/main.hh	Sun May 08 20:01:15 2016 +0100
+++ b/main.hh	Wed May 11 18:41:45 2016 +0100
@@ -40,6 +40,7 @@
 
 typedef struct {
    /* options specific to stage1_2 */
+	bool allow_missing_var_in;     /* Allow definition and invocation of POUs with no input, output and in_out parameters! */
 	bool disable_implicit_en_eno;  /* Disable the generation of implicit EN and ENO parameters on functions and Function Blocks */
 	bool pre_parsing;              /* Support forward references (Run a pre-parsing phase before the defintive parsing phase that builds the AST) */
 	bool safe_extensions;          /* support SAFE_* datatypes defined in PLCOpen TC5 "Safety Software Technical Specification - Part 1" v1.0 */