From 3797cf53577a44fd4a8aa03a0786f420ed19e295 Mon Sep 17 00:00:00 2001
From: Angus Gratton <gus@projectgus.com>
Date: Wed, 29 Jul 2015 16:41:01 +1000
Subject: [PATCH] lwip: Ignore some compiler warnings when debugging is on

---
 lwip/include/arch/cc.h | 8 ++++++--
 lwip/lwip              | 2 +-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/lwip/include/arch/cc.h b/lwip/include/arch/cc.h
index e489895..a09ea0c 100644
--- a/lwip/include/arch/cc.h
+++ b/lwip/include/arch/cc.h
@@ -87,8 +87,12 @@ typedef int sys_prot_t;
 
 /* Plaform specific diagnostic output */
 #ifdef LWIP_DEBUG
-#define LWIP_PLATFORM_DIAG(x)   do { printf x; } while(0)
-
+#define LWIP_PLATFORM_DIAG(x) do {                      \
+        _Pragma("GCC diagnostic push")                  \
+        _Pragma("GCC diagnostic ignored \"-Wformat\"")  \
+            printf x;                                   \
+        _Pragma("GCC diagnostic pop")                   \
+    } while(0)
 #define LWIP_PLATFORM_ASSERT(x) do { printf("Assertion \"%s\" failed at line %d in %s\n", \
 					    x, __LINE__, __FILE__); while(1) {} } while(0)
 
diff --git a/lwip/lwip b/lwip/lwip
index f041c2e..c4765dc 160000
--- a/lwip/lwip
+++ b/lwip/lwip
@@ -1 +1 @@
-Subproject commit f041c2e4c4c57445cdd8ec7d674dede1be020f02
+Subproject commit c4765dccec5c01faeb87e5ed65db1c99ff5c9a05