[issue1621] Do not assume signed integer overflow behavior

[Guido van Rossum]

Guido van Rossum added the comment:

Close, I'd like to keep the -fwrapv if -Wstrict-overflow isn't supported.

Also, would checking this in mean we can't build with GCC 4.3 until
those issues are all fixed?

__________________________________
Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1621>
__________________________________