[root@centos udpfltr_fork]# ldd udpfltr
    linux-gate.so.1 =>  (0x00dbe000)
    libnfnetlink.so.0 => /usr/lib/libnfnetlink.so.0 (0x005de000)
    libnetfilter_queue.so.1 => /usr/lib/libnetfilter_queue.so.1 (0x004a5000)
    libnglogc.so.0 => /usr/lib/libnglogc.so.0 (0x00a51000)
    libc.so.6 => /lib/libc.so.6 (0x001b9000)
    /lib/ld-linux.so.2 (0x0019a000)

./udpfltr: error while loading shared libraries: libnglogc.so.0: cannot open shared object file: No such file or directory