From 33e3ee07908ae852e665b57509c8256f036d6684 Mon Sep 17 00:00:00 2001
From: Dirk Ziegelmeier <dirk@ziegelmeier.net>
Date: Wed, 29 Mar 2017 08:52:19 +0200
Subject: [PATCH] Clarify LWIP_ALTCP_TLS usage a bit

---
 src/include/lwip/opt.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/include/lwip/opt.h b/src/include/lwip/opt.h
index 86933cc6..8dee1f39 100644
--- a/src/include/lwip/opt.h
+++ b/src/include/lwip/opt.h
@@ -1356,7 +1356,11 @@
 #define LWIP_ALTCP                      0
 #endif
 
-/** LWIP_ALTCP_TLS==1: enable TLS support for altcp API */
+/** LWIP_ALTCP_TLS==1: enable TLS support for altcp API.
+ * This needs a port of the functions in altcp_tls.h to a TLS library.
+ * A port to ARM mbedtls is provided with lwIP, see apps/altcp_tls/ directory
+ * and LWIP_ALTCP_TLS_MBEDTLS option.
+ */
 #ifndef LWIP_ALTCP_TLS
 #define LWIP_ALTCP_TLS                  0
 #endif