perl invocation per gcc invocation?? You Better Let Users Turn It OFF. Do not depend on everyone wanting it, whatever it does (did you notice that: I don't KNOW what it does, nor do I CARE.) You can consider this a second SO LONG AS it can be turned off. If not and you force me to use it, then I need to cosider alternatives... Users have THE FINAL SAY as to what happens and what does not happen on their machine. I speak now as a user: YOU BETTER GIVE ME A CHOICE.