libnet-pcap-perl (0.04-3) in hardy depends on libpcap0.7. However you're trying to compile a newer Net::Pcap (0.14), so you most probably need libpcap0.8-dev instead of libpcap0.7-dev.

Taking a look at pcap.h from libpcap0.8-dev, I could see that it does define pcap_lib_version() and pcap_breakloop(), so I guess it will define the other functions too.