[lwIP] Fix the compiling warning for lwip-1.4.1

components/net/lwip-1.4.1/src/arch/include/arch/cc.h

@@ -76,10 +76,6 @@ typedef rt_uint32_t	mem_ptr_t;
 #define LWIP_TIMEVAL_PRIVATE	   1
 #endif
 
-#if defined(RT_USING_DFS_NET)
-#define LWIP_COMPAT_SOCKETS        0
-#endif
-
 #if defined(__CC_ARM)   /* ARMCC compiler */
 #define PACK_STRUCT_FIELD(x) x
 #define PACK_STRUCT_STRUCT __attribute__ ((__packed__))

components/net/lwip-1.4.1/src/lwipopts.h

@@ -363,9 +363,13 @@
  * LWIP_COMPAT_SOCKETS==1: Enable BSD-style sockets functions names.
  * (only used if you use sockets.c)
  */
+#ifdef RT_USING_DFS_NET
+#define LWIP_COMPAT_SOCKETS             0
+#else
 #ifndef LWIP_COMPAT_SOCKETS
 #define LWIP_COMPAT_SOCKETS             1
 #endif
+#endif
 
 
 /**