Hi all! A newbie question: When I try to compile "nfqnl_test.c" putting on command line: "gcc -Wall -o nfqnl_test nfqnl_test.c" the following error occur: " /tmp/cc8hh7RL.o: In function `print_pkt':nfqnl_test.c:(.text+0x15): undefined reference to `nfq_get_msg_packet_hdr' :nfqnl_test.c:(.text+0x73): undefined reference to `nfq_get_nfmark' :nfqnl_test.c:(.text+0x9a): undefined reference to `nfq_get_indev' :nfqnl_test.c:(.text+0xc1): undefined reference to `nfq_get_outdev' :nfqnl_test.c:(.text+0xef): undefined reference to `nfq_get_payload' /tmp/cc8hh7RL.o: In function `cb':nfqnl_test.c:(.text+0x173): undefined reference to `nfq_set_verdict' /tmp/cc8hh7RL.o: In function `main':nfqnl_test.c:(.text+0x1a5): undefined reference to `nfq_open' :nfqnl_test.c:(.text+0x1fe): undefined reference to `nfq_unbind_pf' :nfqnl_test.c:(.text+0x252): undefined reference to `nfq_bind_pf' :nfqnl_test.c:(.text+0x2b6): undefined reference to `nfq_create_queue' :nfqnl_test.c:(.text+0x317): undefined reference to `nfq_set_mode' :nfqnl_test.c:(.text+0x357): undefined reference to `nfq_nfnlh' :nfqnl_test.c:(.text+0x365): undefined reference to `nfnl_fd' :nfqnl_test.c:(.text+0x392): undefined reference to `nfq_handle_packet' :nfqnl_test.c:(.text+0x3dd): undefined reference to `nfq_destroy_queue' :nfqnl_test.c:(.text+0x3f4): undefined reference to `nfq_close' collect2: ld returned 1 exit status " What I must put a command line to compile the "nfqnl_test.c" Salute Frank Abel __________________________________________ XIII Convención Científica de Ingeniería y Arquitectura 28/noviembre al 1/diciembre de 2006 Cujae, Ciudad de la Habana, Cuba http://www.cujae.edu.cu/eventos/convencion