--- a/ExternalLibraryFunction.st	Wed Mar 30 16:10:37 2016 +0200
+++ b/ExternalLibraryFunction.st	Wed Mar 30 17:28:35 2016 +0200
@@ -314,6 +314,20 @@
     "Modified: / 01-08-2006 / 13:44:57 / cg"
 ! !
 
+!ExternalLibraryFunction class methodsFor:'debugging'!
+
+verbose:aBoolean
+    "turn on/off tracing of calls"
+
+    Verbose := aBoolean
+
+    "
+     ExternalLibraryFunction verbose:true
+    "
+
+    "Created: / 30-03-2016 / 17:28:23 / cg"
+! !
+
 !ExternalLibraryFunction class methodsFor:'type name mapping'!
 
 ffiTypeSymbolForType:aType