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Old 09-18-2007, 06:27 AM   #1
uma mahesh
LQ Newbie
Registered: Feb 2007
Posts: 15

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Error while using libpcap

I could not compile a c program that uses libpcap
main(int argc, char **argv){

/* Open the capture file */
if ((fp = pcap_open_offline(argv[1], errbuf)) == NULL)
when i compile
/tmp/cc9Z2hEW.o(.text+0x59): In function `main':
: undefined reference to `pcap_open_offline'
/tmp/cc9Z2hEW.o(.text+0xa0): In function `main':
: undefined reference to `pcap_loop'
/tmp/cc9Z2hEW.o(.text+0xae): In function `main':
: undefined reference to `pcap_close'
collect2: ld returned 1 exit status

libpcap was installed while installing tcpdump
Old 09-18-2007, 06:29 AM   #2
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Registered: Jul 2003
Location: London, UK
Distribution: Slackware
Posts: 7,464

Rep: Reputation: Disabled
Looks like you need to link the library. Put a -lpcap at the end of your compile command.


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