Make LWIP debug also collect stats (#3099)

Author: earlephilhower

include/lwipopts.h

@@ -45,12 +45,6 @@ extern unsigned long __lwip_rand(void);
 #define LWIP_NETIF_HOSTNAME           1
 #define LWIP_NUM_NETIF_CLIENT_DATA    5
 #define LWIP_NETCONN                  0
-#define LWIP_STATS                    0
-#define LWIP_STATS_DISPLAY            0
-#define MEM_STATS                     0
-#define SYS_STATS                     0
-#define MEMP_STATS                    0
-#define LINK_STATS                    0
 #define LWIP_CHKSUM_ALGORITHM         0
 #define LWIP_DHCP                     1
 #define LWIP_IPV4                     1
@@ -114,6 +108,22 @@ extern void __setSystemTime(unsigned long long sec, unsigned long us);
 #define SLIP_DEBUG                  (LWIP_DEBUG ? LWIP_DBG_ON : LWIP_DBG_OFF)
 #define DHCP_DEBUG                  (LWIP_DEBUG ? LWIP_DBG_ON : LWIP_DBG_OFF)
 
+#if !LWIP_DEBUG
+#define LWIP_STATS                    0
+#define LWIP_STATS_DISPLAY            0
+#define MEM_STATS                     0
+#define SYS_STATS                     0
+#define MEMP_STATS                    0
+#define LINK_STATS                    0
+#else
+#define LWIP_STATS                    1
+#define LWIP_STATS_DISPLAY            1
+#define MEM_STATS                     1
+#define SYS_STATS                     1
+#define MEMP_STATS                    1
+#define LINK_STATS                    1
+#endif
+
 #ifdef __cplusplus
 }
 #endif // __cplusplus