strtoull undeclared in namespace std

[Wei Qin <wqin@xxxxxxxxxxxxxxxx>]

Hi,
	My code does something like

#include <cstdlib>

...

 val = std::strtoull(str, NULL, 0);

	It worked fine for a while. But recently
as I began to use g++3.3.1(on cygwin), it breaks with the
error message in the subject. I couldn't find
a portable fix for this problem. Please help.

thanks in advance,

Wei