Contrary to your other replies — old code, written in K&R C, was not broken from the start. ANSI C broke it with undefined behavior (by accident, I think) and ‘

Contrary to your other replies — old code, written in K&R C, was not broken from the start. ANSI C broke it with undefined behavior (by accident, I think) and ‘volatile’ (not by accident, just not fully thought through).