Build: avoid compiling code for unused transports, routers, authenticators

[exim.git] / src / src / auths / external.c

diff --git a/src/src/auths/external.c b/src/src/auths/external.c
index 790b9815902fa8897404265fcd406d4040b1f455..6ae5833afcef274219b7c42b7fe0fcac977e5c19 100644 (file)
--- a/src/src/auths/external.c
+++ b/src/src/auths/external.c
@@ -2,8 +2,10 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
+/* Copyright (c) The Exim Maintainers 2023 */
 /* Copyright (c) Jeremy Harris 2019-2020 */
 /* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 /* This file provides an Exim authenticator driver for
 a server to verify a client SSL certificate, using the EXTERNAL
@@ -12,6 +14,8 @@ method defined in RFC 4422 Appendix A.
 
 
 #include "../exim.h"
+
+#ifdef AUTH_EXTERNAL   /* Remainder of file */
 #include "external.h"
 
 /* Options specific to the external authentication mechanism. */
@@ -151,5 +155,6 @@ return OK;
 
 
 
-#endif   /*!MACRO_PREDEF*/
+#endif /*!MACRO_PREDEF*/
+#endif /*AUTH_EXTERNAL*/
 /* End of external.c */