Starting with libc 2.20, this file would fail to build with "NULL undeclared".
Include the fine header to solve that.

--- net-tools-1.60/lib/ec_hw.c	1999-11-20 22:02:53.000000000 +0100
+++ net-tools-1.60/lib/ec_hw.c	2014-10-06 22:48:43.811027768 +0200
@@ -16,6 +16,7 @@
 
 #if HAVE_HWEC
 
+#include <stddef.h>
 #include <net/if_arp.h>
 #include "net-support.h"


Avoid "label at end of compound statement" errors.

--- net-tools-1.60/lib/inet_sr.c	2000-02-20 22:46:45.000000000 +0100
+++ net-tools-1.60/lib/inet_sr.c	2014-10-06 22:51:22.575023126 +0200
@@ -104,7 +104,6 @@ static int INET_setroute(int action, int
        isnet = 1; break;
     case 2:
        isnet = 0; break;
-    default:
     }
 
     /* Fill in the other fields. */

--- net-tools-1.60/hostname.c	2001-04-08 19:04:23.000000000 +0200
+++ net-tools-1.60/hostname.c	2014-10-06 23:01:04.235006119 +0200
@@ -77,7 +77,6 @@ static void setnname(char *nname)
         case EINVAL:
             fprintf(stderr, _("%s: name too long\n"), program_name);
             break;
-        default:
         }
 	exit(1);
     }
@@ -97,7 +96,6 @@ static void sethname(char *hname)
 	case EINVAL:
 	    fprintf(stderr, _("%s: name too long\n"), program_name);
 	    break;
-	default:
 	}
 	exit(1);
     };
@@ -116,7 +114,6 @@ static void setdname(char *dname)
 	case EINVAL:
 	    fprintf(stderr, _("%s: name too long\n"), program_name);
 	    break;
-	default:
 	}
 	exit(1);
     };
@@ -173,7 +170,6 @@ static void showhname(char *hname, int c
 	    *p = '\0';
 	printf("%s\n", hp->h_name);
 	break;
-    default:
     }
 }


Work around the assumption that an 'x25_address' typedef exists.

--- net-tools-1.60/lib/x25_sr.c	2000-05-20 15:38:10.000000000 +0200
+++ net-tools-1.60/lib/x25_sr.c	2014-10-06 22:59:35.787008705 +0200
@@ -77,7 +77,7 @@ static int X25_setroute(int action, int
   rt.sigdigits=sigdigits;
 
   /* x25_route_struct.address isn't type struct sockaddr_x25, Why? */
-  memcpy(&rt.address, &sx25.sx25_addr, sizeof(x25_address));
+  memcpy(&rt.address, &sx25.sx25_addr, sizeof(struct x25_address));
 
   while (*args) {
 	if (!strcmp(*args,"device") || !strcmp(*args,"dev")) {


Fix the multi-line string literal syntax.

--- net-tools-1.60/mii-tool.c	2000-05-21 16:31:17.000000000 +0200
+++ net-tools-1.60/mii-tool.c	2014-10-06 23:07:42.002994489 +0200
@@ -379,16 +379,16 @@ static void watch_one_xcvr(int skfd, cha
 /*--------------------------------------------------------------------*/
 
 const char *usage =
-"usage: %s [-VvRrwl] [-A media,... | -F media] [interface ...]
-       -V, --version               display version information
-       -v, --verbose               more verbose output
-       -R, --reset                 reset MII to poweron state
-       -r, --restart               restart autonegotiation
-       -w, --watch                 monitor for link status changes
-       -l, --log                   with -w, write events to syslog
-       -A, --advertise=media,...   advertise only specified media
-       -F, --force=media           force specified media technology
-media: 100baseT4, 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD,
+"usage: %s [-VvRrwl] [-A media,... | -F media] [interface ...]\n\
+       -V, --version               display version information\n\
+       -v, --verbose               more verbose output\n\
+       -R, --reset                 reset MII to poweron state\n\
+       -r, --restart               restart autonegotiation\n\
+       -w, --watch                 monitor for link status changes\n\
+       -l, --log                   with -w, write events to syslog\n\
+       -A, --advertise=media,...   advertise only specified media\n\
+       -F, --force=media           force specified media technology\n\
+media: 100baseT4, 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD,\n\
        (to advertise both HD and FD) 100baseTx, 10baseT\n";
 
 int main(int argc, char **argv)