+AS_IF(
+ [test "x$with_twin_x11" != "xyes" && \
+ test "x$with_twin_fbdev" != "xyes" && \
+ test "x$ax_cv_curses" != "xyes"],
+ [AC_MSG_WARN([ No user interface programs configured. Consider using --with-ncurses, --with-twin-x11 or --with-twin-fbdev'])]
+)
+