https://bugs.gentoo.org/871597
https://rt.cpan.org/Public/Bug/Display.html?id=124134

From ee4e010724ea0106f0ebdf572c6b55573122f12b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
Date: Fri, 19 Jan 2018 15:56:05 +0100
Subject: [PATCH] Silent compiler warnings
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Petr Písař <ppisar@redhat.com>
---
 RawIP.xs     | 12 +++---------
 eth.c        |  5 ++++-
 ifaddrlist.c |  3 +--
 3 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/RawIP.xs b/RawIP.xs
index 234ea5d..143c65f 100644
--- a/RawIP.xs
+++ b/RawIP.xs
@@ -166,14 +166,6 @@ u_long host_to_ip (char *host_name);
 void pkt_send(int fd, unsigned char *sock, u_char *pkt, int size);
 int linkoffset(int);
  
-static int
-not_here(s)
-    char *s;
-{
-    croak("%s not implemented on this architecture", s);
-    return -1;
-}
-
 static double
 constant(name, arg)
     char *name;
@@ -592,6 +584,8 @@ CODE:
     memset(dev,0,16);
     len = ip_rt_dev(addr,dev);
     RETVAL = newSVpv(dev,len); 
+#else
+    PERL_UNUSED_ARG(addr);
 #endif
 #if !defined(_LINUX_) && !defined(_BPF_)
     croak("rdev() is not implemented on this system");
@@ -689,7 +683,7 @@ send_eth_packet(fd,eth_device,pkt,flag)
     SV* pkt
     int flag
 CODE:
-    send_eth_packet(fd, eth_device, (char*)SvPV(pkt,PL_na), SvCUR(pkt),flag);
+    send_eth_packet(fd, eth_device, (unsigned char*)SvPV(pkt,PL_na), SvCUR(pkt),flag);
 
 AV * 
 eth_parse(pkt)
diff --git a/eth.c b/eth.c
index 48aeed2..a36a9ab 100644
--- a/eth.c
+++ b/eth.c
@@ -235,7 +235,10 @@ int
 tap(char *dev,unsigned int *my_eth_ip,unsigned char *my_eth_mac)
 {
  
-    int fd,v,s;
+    int fd;
+#ifdef _BPF_
+    int v,s;
+#endif
     struct ifreq ifr;
     (void)strcpy(ifr.ifr_name, dev);
 #ifndef _BPF_
diff --git a/ifaddrlist.c b/ifaddrlist.c
index 0729b2b..b60ef3c 100644
--- a/ifaddrlist.c
+++ b/ifaddrlist.c
@@ -41,7 +41,7 @@ ifaddrlist(register struct ifaddrlist **ipaddrp, register char *errbuf)
 #ifdef HAVE_SOCKADDR_SA_LEN
     register int n;
 #endif
-    register struct ifreq *ifrp, *ifend, *ifnext, *mp;
+    register struct ifreq *ifrp, *ifend, *ifnext;
     register struct sockaddr_in *sin;
     register struct ifaddrlist *al;
     struct ifconf ifc;
@@ -71,7 +71,6 @@ ifaddrlist(register struct ifaddrlist **ipaddrp, register char *errbuf)
     ifend = (struct ifreq *)((char *)ibuf + ifc.ifc_len);
 
     al = ifaddrlist;
-    mp = NULL;
     nipaddr = 0;
     for (; ifrp < ifend; ifrp = ifnext)
     {
-- 
2.13.6