"Compiling" version
diff --git a/Include/traceback.h b/Include/traceback.h
new file mode 100644
index 0000000..920feff
--- /dev/null
+++ b/Include/traceback.h
@@ -0,0 +1,6 @@
+/* Traceback interface */
+
+int tb_here PROTO((struct _frame *, int, int));
+object *tb_fetch PROTO((void));
+int tb_store PROTO((object *));
+int tb_print PROTO((object *, FILE *));