@@ -1746,10 +1746,15 @@
 			AC_SUBST(OF_SELECT_KERNEL_EVENT_OBSERVER_M,
 				"OFSelectKernelEventObserver.m")
 		])
 		;;
 	esac
+
+	AC_CHECK_HEADERS(ifaddrs.h)
+	AC_CHECK_FUNC(getifaddrs, [
+		AC_DEFINE(OF_HAVE_GETIFADDRS, 1, [Whether we have getifaddrs()])
+	])
 
 	AC_ARG_WITH(tls,
 		AS_HELP_STRING([--with-tls], [
 			enable TLS support using the specified library
 			(yes, openssl, gnutls, securetransport or no)]))