gentoo-overlay/dev-perl/Net-ARP/files/1.0.6-header.diff

--- Net-ARP/arp_lookup_linux.c
+++ Net-ARP/arp_lookup_linux.c
@@ -20,6 +20,7 @@
 
 #include <errno.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/socket.h>