extern void VG_(load_suppressions) ( void );
-extern void VG_(show_all_errors) ( void );
+// if verbosity == 0, print nothing.
+// else if xml print suppressions used (in xml format)
+// else if verbosity == 1 print Error summary
+// else print all errors and suppressions used.
+extern void VG_(show_all_errors) ( Int verbosity, Bool xml );
+
+/* Print (in readable format) the last error that occured. */
+extern void VG_(show_last_error) ( void );
extern void VG_(show_error_counts_as_XML) ( void );