Re: a problem in code... please help

[Guy Harris <guy () alum mit edu>]

On Sep 6, 2009, at 5:46 AM, Drona Nagarajan wrote:

> the file is saved as sniff.c
> now on the terminal when i gcc the code i get
>
> the problem....
>
> /tmp/ccGTnIuI.o: In function `main':
> sniff.c:(.text+0x107): undefined reference to `pcap_lookupdev'
> sniff.c:(.text+0x160): undefined reference to `pcap_open_live'
> sniff.c:(.text+0x1c6): undefined reference to `pcap_loop'
> collect2: ld returned 1 exit status

So you're compiling it with

        gcc -o sniff sniff.c -lpcap

right?  If "-lpcap" isn't there, it won't work - libpcap is a library  
of its own, so you have to tell the compiler to link with it.
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