+AC_MSG_CHECKING([default value for --modify-window])
+case $host_os in
+ *cygwin* ) DEFAULT_MODIFY_WINDOW=${DEFAULT_MODIFY_WINDOW:-1};;
+ * ) DEFAULT_MODIFY_WINDOW=${DEFAULT_MODIFY_WINDOW:-0};;
+esac
+AC_MSG_RESULT($DEFAULT_MODIFY_WINDOW)
+AC_DEFINE_UNQUOTED(DEFAULT_MODIFY_WINDOW, $DEFAULT_MODIFY_WINDOW,
+ [Set to the default value for the --modify-window option])
+
+AC_MSG_CHECKING([whether to call shutdown on all sockets])
+case $host_os in
+ *cygwin* ) AC_MSG_RESULT(yes)
+ AC_DEFINE(SHUTDOWN_ALL_SOCKETS, 1, [Define if sockets need to be shutdown])
+ ;;
+ * ) AC_MSG_RESULT(no);;
+esac
+