+AC_ARG_WITH(launchd, AS_HELP_STRING([--with-launchd], [Build with support for Apple's launchd (default: auto)]), [LAUNCHD=$withval], [LAUNCHD=auto])
+if test "x$LAUNCHD" = xauto; then
+ unset LAUNCHD
+ AC_CHECK_PROG(LAUNCHD, [launchd], [yes], [no])
+fi
+
+if test "x$LAUNCHD" = xyes ; then
+ AC_DEFINE(HAVE_LAUNCHD, 1, [launchd support available])
+fi