From 5097ac05bf6eeb7b96413083bbca9b2aae16f19a Mon Sep 17 00:00:00 2001
From: Sylvain Rochet <gradator@gradator.net>
Date: Sat, 14 Mar 2015 13:59:44 +0100
Subject: [PATCH] PPP, fixed warnings if LWIP_SNMP is disabled

---
 src/netif/ppp/pppoe.c    | 6 +++++-
 src/netif/ppp/pppol2tp.c | 6 +++++-
 src/netif/ppp/pppos.c    | 2 ++
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/netif/ppp/pppoe.c b/src/netif/ppp/pppoe.c
index 273a0192..48251f4e 100644
--- a/src/netif/ppp/pppoe.c
+++ b/src/netif/ppp/pppoe.c
@@ -212,6 +212,8 @@ static err_t pppoe_write(ppp_pcb *ppp, void *ctx, struct pbuf *p) {
   err_t ret;
 #if LWIP_SNMP
   u16_t tot_len;
+#else /* LWIP_SNMP */
+  LWIP_UNUSED_ARG(ppp);
 #endif /* LWIP_SNMP */
 
   /* skip address & flags */
@@ -250,10 +252,12 @@ static err_t pppoe_netif_output(ppp_pcb *ppp, void *ctx, struct pbuf *p, u_short
   struct pppoe_softc *sc = (struct pppoe_softc *)ctx;
   struct pbuf *pb;
   u8_t *pl;
+  err_t err;
 #if LWIP_SNMP
   u16_t tot_len;
+#else /* LWIP_SNMP */
+  LWIP_UNUSED_ARG(ppp);
 #endif /* LWIP_SNMP */
-  err_t err;
 
   /* @todo: try to use pbuf_header() here! */
   pb = pbuf_alloc(PBUF_LINK, PPPOE_HEADERLEN + sizeof(protocol), PBUF_RAM);
diff --git a/src/netif/ppp/pppol2tp.c b/src/netif/ppp/pppol2tp.c
index d1b69416..57d4de2f 100644
--- a/src/netif/ppp/pppol2tp.c
+++ b/src/netif/ppp/pppol2tp.c
@@ -217,6 +217,8 @@ static err_t pppol2tp_write(ppp_pcb *ppp, void *ctx, struct pbuf *p) {
   err_t ret;
 #if LWIP_SNMP
   u16_t tot_len;
+#else /* LWIP_SNMP */
+  LWIP_UNUSED_ARG(ppp);
 #endif /* LWIP_SNMP */
 
   ph = pbuf_alloc(PBUF_TRANSPORT, (u16_t)(PPPOL2TP_OUTPUT_DATA_HEADER_LEN), PBUF_RAM);
@@ -252,10 +254,12 @@ static err_t pppol2tp_netif_output(ppp_pcb *ppp, void *ctx, struct pbuf *p, u_sh
   pppol2tp_pcb *l2tp = (pppol2tp_pcb *)ctx;
   struct pbuf *pb;
   u8_t *pl;
+  err_t err;
 #if LWIP_SNMP
   u16_t tot_len;
+#else /* LWIP_SNMP */
+  LWIP_UNUSED_ARG(ppp);
 #endif /* LWIP_SNMP */
-  err_t err;
 
   /* @todo: try to use pbuf_header() here! */
   pb = pbuf_alloc(PBUF_TRANSPORT, PPPOL2TP_OUTPUT_DATA_HEADER_LEN + sizeof(protocol), PBUF_RAM);
diff --git a/src/netif/ppp/pppos.c b/src/netif/ppp/pppos.c
index ddb3b7ff..9d474ca8 100644
--- a/src/netif/ppp/pppos.c
+++ b/src/netif/ppp/pppos.c
@@ -1005,7 +1005,9 @@ pppos_output_append(pppos_pcb *pppos, err_t err, struct pbuf *nb, u8_t c, u8_t a
 static err_t
 pppos_output_last(pppos_pcb *pppos, err_t err, struct pbuf *nb, u16_t *fcs)
 {
+#if LWIP_SNMP
   ppp_pcb *ppp = pppos->ppp;
+#endif /* LWIP_SNMP */
 
   /* Add FCS and trailing flag. */
   err = pppos_output_append(pppos, err,  nb, ~(*fcs) & 0xFF, 1, NULL);