need help..

hello,
having compilation issues...here's the deal

: undefined reference to `libnet_name2addr4'
: undefined reference to `libnet_addr2name4'
: undefined reference to `libnet_get_prand'
: undefined reference to `libnet_getdevice'
: undefined reference to `libnet_get_ipaddr4'
: undefined reference to `libnet_get_hwaddr'
: undefined reference to `libnet_init'
: undefined reference to `libnet_build_udp'
: undefined reference to `libnet_build_ipv4'
: undefined reference to `libnet_build_ethernet'
: undefined reference to `libnet_write'
: undefined reference to `libnet_geterror'
: undefined reference to `libnet_destroy'

libnet issues...
any ideas?
thanks


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