From 64aa7ca30cb4225652f445a3652bce1ea1a6d8d9 Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Mon, 12 Feb 2018 15:28:58 +0000
Subject: [PATCH] coap_io.c: Fix coap_log warning message

Adding in '__attribute__ ((format(printf, 2, 3))' causes
coap_log(LOG_DEBUG, coap_socket_strerror()); to give a warning in coap_run_once
---
 src/coap_io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/coap_io.c b/src/coap_io.c
index 9af6d98e..f435f47b 100644
--- a/src/coap_io.c
+++ b/src/coap_io.c
@@ -1169,7 +1169,7 @@ coap_run_once(coap_context_t *ctx, unsigned timeout_ms) {
 #else
     if (errno != EINTR) {
 #endif
-      coap_log(LOG_DEBUG, coap_socket_strerror());
+      coap_log(LOG_DEBUG, "%s", coap_socket_strerror());
       return -1;
     }
   }