George Toft wrote:
> It's coming back to me now: -w is "strict" so you use it to
> develop with, then remove it (as the code "works properly") so
> it is not needed.

Yes, but since you used the word "strict" I need to comment.
The "use strict" pragma should stay in place.  It just
enforces some good practices and does not, as far as I know,
produce any run-time surprises.