binary operator '>?' that is accepted by gcc-3.x but not by gcc-4.2.
I did not find the definition of this operator and do not know whether
it is an extension found in g++-3.x, but I assume that it is a maximum
value operator (a >? b) <==> max(a, b) and this patch implements this
operation explicitly instead of via the (unknown in g++-4.2) operator.
Submitted by: pointyhat via kris