signed is undefined and has been since 1992 (in GCC)

[Olivier Galibert]

On Tue, Jun 28, 2005 at 02:44:40PM -0700, Joe Buck wrote:
> I challenge you, Robert, to find us a C compiler that generates trapping
> instructions for integer adds by default.  I do not believe that such a
> compiler exists.

Perusing the manpage of SGI's cc and CC on IRIX, there isn't even an
option to have trapping integer arithmetic.

  OG.