>
> Paul Eggert <[EMAIL PROTECTED]> writes:
>
> > * NEWS: AC_PROG_CC, AC_PROG_CXX, and AC_PROG_OBJC now take an
> > optional second argument specifying the default optimization
> > options for GCC. These optimizations now default to "-O2 -fwrapv"
> > instead of to "-O2". This partly attacks the problem reported by
> > Ralf Wildenhues in
> > <http://lists.gnu.org/archive/html/bug-gnulib/2006-12/msg00084.html>
> > and in <http://gcc.gnu.org/ml/gcc/2006-12/msg00459.html>.
>
> Does anybody think that Paul's proposed patch to autoconf would be
> better than changing VRP?
I think both ways are incorrect way forward.
What about coding the loops like:
if (sizeof(time_t) == sizeof(unsigned int))
{
// do loop using unsigned int
// convert to time_t and then see if an overflow happened
}
//etc. for the other type
This way you don't depend on either implemenetation defined behavior
of converting between integer with different sizes and undefined behavior
with signed type overflow.
Thanks,
Andrew Pinski
