[op25-dev] Newbie Error question <error: libpcap library not found>

Hi gang i have installed gnu radio and when i get to the ./configure command i get the following error checking for pcap_open_live, pcap_open_dead, pcap_close, pcap_next, pcap_next_ex, pcap_datalink, pcap_inject, pcap_dump, pcap_geterr in -lpcap... no configure: error: libpcap library not found. Thanks for your support Allan