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On Thu, Jul 17, 2003 at 10:18:51PM +0100, David Laight wrote:
> > > Just be glad you aren't using the old IBM (IIRC) system which had the
> > > constants 0, 1, 2 at 'well known' addresses.  This system ran FORTRAN
> > > and all arguments are passed by reference.  If a routine accidentally
> > > changed a (supposedly) constant 1 that was passed to it, then the
> > > value of 1 changed for the entire OS.
> >=20
> > Still works with NetBSD f77.
>=20
> Nah - it will only change '1' for that program, not the entire OS.

This is only a side effect of having seperate copies of the address space
per program ;-)

The problem discussed in the thread - how to deal with pointers
to constants - is the same  - only the scope of the damage is
bigger on ancient machines.

> PS can we have the 3-way arithmetic if?

Works fine.
	-is

--=20
seal your e-mail: http://www.gnupg.org/

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