Just remove compiler warnings.

Demo/Common/ethernet/uIP/uip-1.0/uip/psock.c

@@ -83,6 +83,7 @@ static u8_t
 buf_bufdata(struct psock_buf *buf, u16_t len,
 	    u8_t **dataptr, u16_t *datalen)
 {
+  ( void ) len;
   if(*datalen < buf->left) {
     memcpy(buf->ptr, *dataptr, *datalen);
     buf->ptr += *datalen;
@@ -185,7 +186,7 @@ PT_THREAD(psock_send(register struct psock *s, const char *buf,
 
   /* Save the length of and a pointer to the data that is to be
      sent. */
-  s->sendptr = buf;
+  s->sendptr = (unsigned char*)buf;
   s->sendlen = len;
 
   s->state = STATE_NONE;
@@ -273,7 +274,7 @@ PT_THREAD(psock_readto(register struct psock *psock, unsigned char c))
 {
   PT_BEGIN(&psock->psockpt);
 
-  buf_setup(&psock->buf, psock->bufptr, psock->bufsize);
+  buf_setup(&psock->buf, (unsigned char*)psock->bufptr, psock->bufsize);
   
   /* XXX: Should add buf_checkmarker() before do{} loop, if
      incoming data has been handled while waiting for a write. */
@@ -300,7 +301,7 @@ PT_THREAD(psock_readbuf(register struct psock *psock))
 {
   PT_BEGIN(&psock->psockpt);
 
-  buf_setup(&psock->buf, psock->bufptr, psock->bufsize);
+  buf_setup(&psock->buf, (unsigned char * ) psock->bufptr, psock->bufsize);
   
   /* XXX: Should add buf_checkmarker() before do{} loop, if
      incoming data has been handled while waiting for a write. */
@@ -331,7 +332,7 @@ psock_init(register struct psock *psock, char *buffer, unsigned int buffersize)
   psock->readlen = 0;
   psock->bufptr = buffer;
   psock->bufsize = buffersize;
-  buf_setup(&psock->buf, buffer, buffersize);
+  buf_setup(&psock->buf, (unsigned char*) buffer, buffersize);
   PT_INIT(&psock->pt);
   PT_INIT(&psock->psockpt);
 }