AC_CHECK_HEADERS(strings.h)
AC_CHECK_HEADERS(sys/types.h sys/socket.h sys/un.h)
AC_CHECK_HEADERS(security/pam_appl.h crypt.h shadow.h)
+AC_CHECK_HEADERS(sys/resource.h)
dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_CHECK_FUNCS(setlinebuf)
AC_CHECK_FUNCS(seteuid, [seteuid=1], [seteuid=0])
AC_CHECK_FUNCS(setegid, [setegid=1], [setegid=0])
+AC_CHECK_FUNCS(setpriority)
AC_CHECK_FUNCS(getspnam, [getspnam=1], [getspnam=0])
if test "$getspnam" -eq "0"; then