Thanks, good stuff. dolmen/Olivier's followup is good too. I now remember why I used the complicated expr command and make; it's to ensure it works with C and

Thanks, good stuff. dolmen/Olivier's followup is good too. I now remember why I used the complicated expr command and make; it's to ensure it works with C and C++. And any language that happens to accept // as a comment and is supported by "make". (note that no actual Makefile is required)