AC_DEFUN([hs_ULONG_CONST],
[ AH_TEMPLATE(ULONG_CONST, [How do we create unsigned long constants?])
AC_EGREP_CPP(Circus,
 [#define ACAT(a,b)a ## b
ACAT(Cir,cus)
], AC_DEFINE([ULONG_CONST(a)], [a ## UL]),
    AC_EGREP_CPP(Reiser,
[#define RCAT(a,b)a/**/b
RCAT(Rei,ser)
], AC_DEFINE([ULONG_CONST(a)], [a/**/L]),
    AC_MSG_ERROR([How do we create an unsigned long constant?])))])