pcap-config - write libpcap compiler and linker flags to standard output
pcap-config [ --static ] [ --cflags | --libs |
  --additional-libs ]
When run with the --cflags option, pcap-config writes to the
  standard output the -I compiler flags required to include libpcap's
  header files. When run with the --libs option, pcap-config
  writes to the standard output the -L and -l linker flags
  required to link with libpcap, including -l flags for libraries
  required by libpcap. When run with the --additional-libs option,
  pcap-config writes to the standard output the -L and -l
  flags for libraries required by libpcap, but not the -lpcap flag to
  link with libpcap itself.
By default, it writes flags appropriate for compiling with a
    dynamically-linked version of libpcap; the --static flag causes it to
    write flags appropriate for compiling with a statically-linked version of
    libpcap.