Sorry to repost this....but I have only gotten one response and it wasn't really helpful at all. I really have no idea what else to try. It should be said that I successfully install libnetfilter_queue and it compiles (the version off the netfilter.org websit). Even the example works fine, it's just when I try to use the libraries in my own program. I don't know if there are more aspects to the Makefile that I'm missing, but I don't know what it would be and why it would be needed. I keep getting this errror. I installed libnetfilter_queue and libnetfilter_conntrack using yum. The shared libraries are in the right places (/usr/lib/ and /usr/lib64/) and I'm using the -l options (-lnfnetlink -lnetfilter_queue). Not sure why it's not working. Here is the output: g++ -g -Wall -c test.cpp -o test.o g++ test.o -lnfnetlink -lnetfilter_queue -o test test.o: In function `main': test.cpp:65: undefined reference to `nfq_open()' test.cpp:72: undefined reference to `nfq_unbind_pf(nfq_handle*, unsigned short)' test.cpp:78: undefined reference to `nfq_bind_pf(nfq_handle*, unsigned short)' test.cpp:84: undefined reference to `nfq_create_queue(nfq_handle*, unsigned short, int (*)(nfq_q_handle*, nfgenmsg*, nfq_data*, void*), void*)' test.cpp:91: undefined reference to `nfq_set_mode(nfq_q_handle*, unsigned char, unsigned int)' test.cpp:97: undefined reference to `nfq_set_queue_maxlen(nfq_q_handle*, unsigned int)' test.cpp:103: undefined reference to `nfq_nfnlh(nfq_handle*)' test.cpp:104: undefined reference to `nfnl_fd(nfnl_handle*)' test.cpp:108: undefined reference to `nfq_handle_packet(nfq_handle*, char*, int)' test.cpp:112: undefined reference to `nfq_destroy_queue(nfq_q_handle*)' test.cpp:115: undefined reference to `nfq_close(nfq_handle*)' test.o: In function `print_pkt': test.cpp:18: undefined reference to `nfq_get_msg_packet_hdr(nfq_data*)' test.cpp:25: undefined reference to `nfq_get_nfmark(nfq_data*)' test.cpp:29: undefined reference to `nfq_get_indev(nfq_data*)' test.cpp:33: undefined reference to `nfq_get_outdev(nfq_data*)' test.cpp:37: undefined reference to `nfq_get_payload(nfq_data*, char**)' test.o: In function `cb': test.cpp:52: undefined reference to `nfq_set_verdict(nfq_q_handle*, unsigned int, unsigned int, unsigned int, unsigned char*)' collect2: ld returned 1 exit status make: *** [test] Error 1 Here is my simplistic Makefile: LDOPTS = LIBS = -lnfnetlink -lnetfilter_queue INCDIR = CXXFLAGS= -g -Wall#$(INCDIR) sources := $(wildcard *.cpp) $(wildcard *.c) objs := $(sources) objs := $(objs:.c=.o) objs := $(objs:.cpp=.o) all: test clean: rm -f $(objs) test test: $(objs) $(CXX) $^ $(LDOPTS) $(LIBS) -o $@ .c.o: $(CC) $(CXXFLAGS) -c $< -o $@ .cpp.o: $(CXX) $(CXXFLAGS) -c $< -o $@ Can anybody point me in the right direction? Don't know why it doesn't want to link. - To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
