Problems finding pcap.h and linking

Question

I'm working on Fedora 17 and I want to program with libpcap. The problem is that my computer isn't finding pcap.h, which is really wierd since I've installed libpcap and libpcap-devel. Also wireshark and snort works on my station which I believe uses that library. So when I compile my code with ...

#include <pcap.h>
... Code

And use gcc my_file.c -lpcap, I get compiler errors that say ... can't find pcap.h. Whats odd is that I see my libpcap.so files in /libraries/ directory. I've done ..

yum install libpcap and yum install libpcap-devel

I don't know why Fedora is doing this to me.

Thanks for any help!

Answer 1

Your library might be missing, install it and link it

yum install libpcap-devel

In your makefile add:

-L/usr/lib -lpcap

Answer 2

Try

~$ whereis pcap

Then as mata said

gcc -lpcap -I{path} file.c

where {path} is the path that whereis gave you, you will choose the one with the pcap.h substring at the end (without the pcap.h part).

Answer 3

You'll have to specify the folder where the headers are installed, for example:

gcc -I/usr/include/pcap my_file.c -lpcap

Try locate pcap.h to find the right directory to use with the -I switch.