Fixed bug #37893 Unused variables in tcp_out (and in udp.c/.h)

[pes-rpp/rpp-lwip.git] / src / core / tcp_out.c

diff --git a/src/core/tcp_out.c b/src/core/tcp_out.c
index 8cfb3df9c4e34a07592913b7fde1555a66016d61..10d5b3045dddd8d437560761dd4c1f6d993a8676 100644 (file)
--- a/src/core/tcp_out.c
+++ b/src/core/tcp_out.c
@@ -845,8 +845,10 @@ err_t
 tcp_send_empty_ack(struct tcp_pcb *pcb)
 {
   struct pbuf *p;
-  struct tcp_hdr *tcphdr;
   u8_t optlen = 0;
+#if LWIP_TCP_TIMESTAMPS || CHECKSUM_GEN_TCP
+  struct tcp_hdr *tcphdr;
+#endif /* LWIP_TCP_TIMESTAMPS || CHECKSUM_GEN_TCP */
 
 #if LWIP_TCP_TIMESTAMPS
   if (pcb->flags & TF_TIMESTAMP) {
@@ -859,7 +861,9 @@ tcp_send_empty_ack(struct tcp_pcb *pcb)
     LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: (ACK) could not allocate pbuf\n"));
     return ERR_BUF;
   }
+#if LWIP_TCP_TIMESTAMPS || CHECKSUM_GEN_TCP
   tcphdr = (struct tcp_hdr *)p->payload;
+#endif /* LWIP_TCP_TIMESTAMPS || CHECKSUM_GEN_TCP */
   LWIP_DEBUGF(TCP_OUTPUT_DEBUG, 
               ("tcp_output: sending ACK for %"U32_F"\n", pcb->rcv_nxt));
   /* remove ACK flags from the PCB, as we send an empty ACK now */