Today I updated the Autoconf manual to contain the following
description of the current situation with signed integer overflow.
This section of the manual is intended to advise programmers what to
do about portable C programs in this area.
I think some discussion along these lines also belongs in
[EMAIL PROTECTED] (Richard Kenner) writes:
Many portable C programs assume that signed integer overflow wraps around
reliably using two's complement arithmetic.
I was looking for an adjective that mean the programs work on a wide
variety of platforms, and portable seems more appropriate
Here are further patches I checked into the Autoconf documentation to
reflect today's comments (some of which I received privately). Thanks
to all of you. The trickiest bit was documenting one simple way to
reliably detect overflow without converting to unsigned and back.
(At least, I hope it's
