require 'mkmf' pcap_dir = with_config("pcap-dir", "/usr/local") pcap_includedir = with_config("pcap-includedir", pcap_dir + "/include") pcap_libdir = with_config("pcap-libdir", pcap_dir + "/lib") $CFLAGS = "-I#{pcap_includedir}" $LDFLAGS = "-L#{pcap_libdir}" have_library("socket", "socket") have_library("xnet", "gethostbyname") have_func("hstrerror") if have_header("pcap.h") && have_library("pcap", "pcap_open_live") have_func("pcap_compile_nopcap") create_makefile("PcapX") end