+# ifndef _PTO_
+# define _PTO_
+
+# include "pto_comp.h"
+
+/* ===================================================
+ Global Defines:
+ =================================================== */
+# define N_INITIAL_OJBS 10
+
+/* ===================================================
+ Global Data Types:
+ =================================================== */
+
+/* ===================================================
+ Global Prototypes:
+ =================================================== */
+/* Perform PTO on all visible graphs. */
+void pto_init (int);
+void pto_run (void);
+/* Dump all interesting stuff to a bunch of files */
+void pto_dump (void);
+/* Clean up our mess */
+void pto_cleanup (void);
+
+/* ===================================================
+ Global Variables:
+ =================================================== */
+
+
+# endif /* not defined _PTO_ */