Changed initialization: many init functions are not needed any more since we now rely on the compiler initializing global and static variables to zero!

src/include/ipv4/lwip/ip.h

@@ -43,7 +43,7 @@
 extern "C" {
 #endif
 
-void ip_init(void);
+#define ip_init() /* Compatibility define, not init needed. */
 struct netif *ip_route(struct ip_addr *dest);
 err_t ip_input(struct pbuf *p, struct netif *inp);
 err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,

src/include/lwip/netif.h

@@ -192,8 +192,7 @@ extern struct netif *netif_list;
 /** The default network interface. */
 extern struct netif *netif_default;
 
-/* netif_init() must be called first. */
-void netif_init(void);
+#define netif_init() /* Compatibility define, not init needed. */
 
 struct netif *netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask,
       struct ip_addr *gw,

src/include/lwip/raw.h

@@ -85,7 +85,7 @@ err_t            raw_send       (struct raw_pcb *pcb, struct pbuf *p);
 
 /* The following functions are the lower layer interface to RAW. */
 u8_t             raw_input      (struct pbuf *p, struct netif *inp);
-void             raw_init       (void);
+#define raw_init() /* Compatibility define, not init needed. */
 
 #ifdef __cplusplus
 }

src/include/lwip/stats.h

@@ -136,7 +136,7 @@ struct stats_ {
 
 extern struct stats_ lwip_stats;
 
-void stats_init(void);
+#define stats_init() /* Compatibility define, not init needed. */
 
 #define STATS_INC(x) ++lwip_stats.x
 #else

src/include/lwip/tcp.h

@@ -52,8 +52,7 @@ struct tcp_pcb;
 /* Functions for interfacing with TCP: */
 
 /* Lower layer interface to TCP: */
-void             tcp_init    (void);  /* Must be called first to
-                                         initialize TCP. */
+#define tcp_init() /* Compatibility define, not init needed. */
 void             tcp_tmr     (void);  /* Must be called every
                                          TCP_TMR_INTERVAL
                                          ms. (Typically 250 ms). */

src/include/lwip/udp.h

@@ -130,7 +130,8 @@ err_t            udp_send       (struct udp_pcb *pcb, struct pbuf *p);
 
 /* The following functions are the lower layer interface to UDP. */
 void             udp_input      (struct pbuf *p, struct netif *inp);
-void             udp_init       (void);
+
+#define udp_init() /* Compatibility define, not init needed. */
 
 #if UDP_DEBUG
 void udp_debug_print(struct udp_hdr *udphdr);

src/include/netif/etharp.h

@@ -141,7 +141,7 @@ struct etharp_q_entry {
 };
 #endif /* ARP_QUEUEING */
 
-void etharp_init(void);
+#define etharp_init() /* Compatibility define, not init needed. */
 void etharp_tmr(void);
 s8_t etharp_find_addr(struct netif *netif, struct ip_addr *ipaddr,
          struct eth_addr **eth_ret, struct ip_addr **ip_ret);