if LWIP_TCP is 0 do not link in TCP code.putting ugly ifdefs in api and core :(.Also only udp_init if LWIP_UDP is on

src/core/tcp.c

@@ -47,7 +47,7 @@
 #include "lwip/memp.h"
 
 #include "lwip/tcp.h"
-
+#if LWIP_TCP
 
 /* Incremented every coarse grained timer shot
    (typically every 500 ms, determined by TCP_COARSE_TIMEOUT). */
@@ -1168,6 +1168,7 @@ tcp_pcbs_sane(void)
   return 1;
 }
 #endif /* TCP_DEBUG */
+#endif /* LWIP_TCP */
 /*-----------------------------------------------------------------------------------*/
 
 

src/core/tcp_in.c

@@ -55,7 +55,7 @@
 #include "lwip/stats.h"
 
 #include "arch/perf.h"
-
+#if LWIP_TCP
 /* These variables are global to all functions involved in the input
    processing of TCP segments. They are set by the tcp_input()
    function. */
@@ -1135,5 +1135,6 @@ tcp_parseopt(struct tcp_pcb *pcb)
     }
   }
 }
+#endif /* LWIP_TCP */
 /*-----------------------------------------------------------------------------------*/
   

src/core/tcp_out.c

@@ -53,7 +53,7 @@
 
 #include "lwip/stats.h"
 
-
+#if LWIP_TCP
 #define MIN(x,y) (x) < (y)? (x): (y)
 
 
@@ -580,7 +580,7 @@ tcp_rexmit(struct tcp_pcb *pcb)
   tcp_output(pcb);
 
 }
-
+#endif /* LWIP_TCP */
 
 
 

src/core/udp.c

@@ -58,7 +58,6 @@
 /*static*/ struct udp_pcb *udp_pcbs = NULL;
 
 static struct udp_pcb *pcb_cache = NULL;
-#endif /* LWIP_UDP */
 
 #if UDP_DEBUG
 int udp_debug_print(struct udp_hdr *udphdr);
@@ -68,12 +67,9 @@ int udp_debug_print(struct udp_hdr *udphdr);
 void
 udp_init(void)
 {
-#if LWIP_UDP
   udp_pcbs = pcb_cache = NULL;
-#endif /* LWIP_UDP */
 }
 
-#if LWIP_UDP
 /*-----------------------------------------------------------------------------------*/
 /* udp_lookup:
  *