Question

I’m using Dev C++ on windows 7, and WinPcap (developer’s pack). Dev c++ is not able to find pcap.h apparently, even though I include the /include/ directory in project options, on compilation it displays an error saying “pcap.h: no such file or directory.” (along with many other errors).
Here is my code:

#include <stdlib.h>
#include <stdio.h>
#include <pcap.h>

int main(int argc, char **argv)
{
pcap_t *fp;
char errbuf[PCAP_ERRBUF_SIZE];
u_char packet[100];

    return 0;
}

I’ve kept it simple. I was originally working in Visual Studio (C++), but distributing code compiled with Visual C++ requires Microsoft C Runtime library to be installed on the target system. I just want to be able to distribute the final executable and get it to work on any machine.

I checked the commmand line given to compiler. It did have the -I [path] option. Well is there anything I’m missing?

As a side note: I had compiled the above code with g++ (from dev c++ installation dir), and it compiled correctly. But when I tried to link it, the executable produced, just crashed on being run.

Answer 1

Your question is a little unclear, but your side-note makes it sound as if you could compile this (i.e. the pcap.h header was found) and your issues is with linking.

To add directories to the search path for libraries use -LPATH where PATH is the actual directory containing libpcap. To actually add it to the link use -lpcap in the linker call, e.g.

$ g++ -o main -LPATH main.o -lpcap