Explains warnings about unused variables

Author: koutoftimer

src/client.c

@@ -82,6 +82,7 @@ client_t *client_create(uint16_t id, socket_t *tcp_sock, socket_t *udp_sock,
  */
 client_t *client_copy(client_t *dst, client_t *src, size_t len)
 {
+    (void)len;  // must be compatible with memcpy signature
     if(!dst || !src)
         return NULL;
 
@@ -103,6 +104,7 @@ client_t *client_copy(client_t *dst, client_t *src, size_t len)
  */
 int client_cmp(client_t *c1, client_t *c2, size_t len)
 {
+    (void)len;  // must be compatible with memcmp signature
     return c1->id - c2->id;
 }
 

src/destination.c

@@ -66,6 +66,7 @@ destination_t *destination_create(const char *address)
 
 destination_t *destination_copy(destination_t *dst, destination_t *src, size_t len)
 {
+    (void)len;  // must be compatible with memcpy signature
     size_t host_len, port_len;
 
     host_len = src->host ? strlen(src->host) : 0;
@@ -116,6 +117,8 @@ static int strcmp_null(const char *s1, const char *s2)
 
 int destination_cmp(destination_t *d1, destination_t *d2, size_t len)
 {
+    (void)len;  // must be compatible with memcmp signature
+
     int cmp;
 
     cmp = strcmp_null(d1->host, d2->host);

src/list.h

@@ -56,6 +56,7 @@ void list_free(list_t *list);
 
 static _inline_ int int_cmp(int *i, int *j, size_t sz)
 {
+    (void)sz;  // must be compatible with memcpy signature
     return *i - *j;
 }
 

src/udpclient.c

@@ -75,6 +75,7 @@ bool isnumber(const char* str) {
  */
 int udpclient(int argc, char* argv[])
 {
+    (void)argc;  // unused
     char *lhost, *lport, *phost, *pport, *rhost, *rport;
     list_t *clients;
     list_t *conn_clients;