Fix lots of compiler warnings

core/lib/petsciiconv.c

@@ -81,7 +81,7 @@ petsciiconv_toascii(char *buf, unsigned int len)
 {
   static char c;
   
-  ptr = buf;
+  ptr = (unsigned char*)buf;
   for(i = len; i > 0; --i) {
     c = *ptr;
     if(c == 0x0a) {
@@ -108,7 +108,7 @@ petsciiconv_toascii(char *buf, unsigned int len)
 void
 petsciiconv_topetscii(char *buf, unsigned int len)
 {
-  ptr = buf;
+  ptr = (unsigned char *)buf;
   for(i = len; i > 0; --i) {
     *ptr = ascii2petscii[*ptr & 0x7f];
     ++ptr;

core/net/ip/resolv.c

@@ -506,7 +506,6 @@ start_name_collision_check(clock_time_t after)
 static unsigned char *
 mdns_write_announce_records(unsigned char *queryptr, uint8_t *count)
 {
-  struct dns_answer *ans;
 
 #if UIP_CONF_IPV6
   uint8_t i;
@@ -524,7 +523,6 @@ mdns_write_announce_records(unsigned char *queryptr, uint8_t *count)
         *queryptr++ = 0xc0;
         *queryptr++ = sizeof(struct dns_hdr);
       }
-      ans = (struct dns_answer *)queryptr;
 
       *queryptr++ = (uint8_t) ((NATIVE_DNS_TYPE) >> 8);
       *queryptr++ = (uint8_t) ((NATIVE_DNS_TYPE));
@@ -546,6 +544,7 @@ mdns_write_announce_records(unsigned char *queryptr, uint8_t *count)
     }
   }
 #else /* UIP_CONF_IPV6 */
+  struct dns_answer *ans;
   queryptr = encode_name(queryptr, resolv_hostname);
   ans = (struct dns_answer *)queryptr;
   ans->type = UIP_HTONS(NATIVE_DNS_TYPE);
@@ -603,8 +602,6 @@ mdns_prep_host_announce_packet(void)
 
   uint8_t total_answers = 0;
 
-  struct dns_answer *ans;
-
   /* Be aware that, unless `ARCH_DOESNT_NEED_ALIGNED_STRUCTS` is set,
    * writing directly to the uint16_t members of this struct is an error. */
   struct dns_hdr *hdr = (struct dns_hdr *)uip_appdata;

core/net/ip/slipdev.c

@@ -103,7 +103,7 @@ slipdev_send(void)
   ptr = &uip_buf[UIP_LLH_LEN];
   for(i = 0; i < uip_len; ++i) {
     if(i == UIP_TCPIP_HLEN) {
-      ptr = (char *)uip_appdata;
+      ptr = uip_appdata;
     }
     c = *ptr++;
     switch(c) {

core/net/ip/tcpip.c

@@ -155,6 +155,7 @@ unsigned char tcpip_is_forwarding; /* Forwarding right now? */
 PROCESS(tcpip_process, "TCP/IP stack");
 
 /*---------------------------------------------------------------------------*/
+#if UIP_TCP
 static void
 start_periodic_tcp_timer(void)
 {
@@ -162,6 +163,7 @@ start_periodic_tcp_timer(void)
     etimer_restart(&periodic);
   }
 }
+#endif
 /*---------------------------------------------------------------------------*/
 static void
 check_for_tcp_syn(void)

core/net/ipv4/uaodv-rt.c

@@ -38,6 +38,7 @@
  */
 
 
+#include <string.h>
 #include "net/ipv4/uaodv-rt.h"
 #include "contiki-net.h"
 

core/net/ipv4/uaodv.c

@@ -39,6 +39,7 @@
 
 #include <stdio.h>
 #include <stdarg.h>
+#include <string.h>
 
 #include "contiki.h"
 #include "net/ipv4/uaodv-def.h"

core/net/mac/contikimac/contikimac.c

@@ -372,7 +372,6 @@ powercycle(struct rtimer *t, void *ptr)
 
   while(1) {
     static uint8_t packet_seen;
-    static rtimer_clock_t t0;
     static uint8_t count;
 
 #if SYNC_CYCLE_STARTS
@@ -396,7 +395,6 @@ powercycle(struct rtimer *t, void *ptr)
     packet_seen = 0;
 
     for(count = 0; count < CCA_COUNT_MAX; ++count) {
-      t0 = RTIMER_NOW();
       if(we_are_sending == 0 && we_are_receiving_burst == 0) {
         powercycle_turn_radio_on();
         /* Check if a packet is seen in the air. If so, we keep the
@@ -530,8 +528,9 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr,
   uint8_t got_strobe_ack = 0;
   int hdrlen, len;
   uint8_t is_broadcast = 0;
-  uint8_t is_reliable = 0;
+#if WITH_PHASE_OPTIMIZATION
   uint8_t is_known_receiver = 0;
+#endif
   uint8_t collisions;
   int transmit_len;
   int ret;
@@ -580,9 +579,6 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr,
                packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[1]);
 #endif /* UIP_CONF_IPV6 */
   }
-  is_reliable = packetbuf_attr(PACKETBUF_ATTR_RELIABLE) ||
-    packetbuf_attr(PACKETBUF_ATTR_ERELIABLE);
-
   packetbuf_set_attr(PACKETBUF_ATTR_MAC_ACK, 1);
 
 #if WITH_CONTIKIMAC_HEADER

core/net/mac/nullrdc.c

@@ -270,11 +270,13 @@ send_list(mac_callback_t sent, void *ptr, struct rdc_buf_list *buf_list)
 static void
 packet_input(void)
 {
+#if NULLRDC_SEND_802154_ACK
   int original_datalen;
   uint8_t *original_dataptr;
 
   original_datalen = packetbuf_datalen();
   original_dataptr = packetbuf_dataptr();
+#endif
 #ifdef NETSTACK_DECRYPT
     NETSTACK_DECRYPT();
 #endif /* NETSTACK_DECRYPT */

core/net/rime/collect-neighbor.c

@@ -254,13 +254,11 @@ collect_neighbor_list_remove(struct collect_neighbor_list *neighbors_list,
 struct collect_neighbor *
 collect_neighbor_list_best(struct collect_neighbor_list *neighbors_list)
 {
-  int found;
   struct collect_neighbor *n, *best;
   uint16_t rtmetric;
 
   rtmetric = RTMETRIC_MAX;
   best = NULL;
-  found = 0;
 
   if(neighbors_list == NULL) {
     return NULL;