libpcap不链接netbeans

Question

I have been trying to learn libpcap on my mac. I am using netbeans IDE. I downloaded libpcap from tcpdump.org and tried to run a sample application from http://yuba.stanford.edu/~casado/pcap/section1.html .

I get these errors:

Undefined symbols for architecture x86_64:
  "_pcap_lookupdev", referenced from:
      _main in main.o
  "_pcap_lookupnet", referenced from:
      _main in main.o

I tried to manually link libpcap to netbeans by right clicking on project-name->properties and adding the libpcap folder to Build->C++ compiler->Include Directories . Pretty stumped.

Answer 1

Beside the include directories (= headers) you have to add the library too!

At Build -> Linker settings, add libpcap to Libraries ; if not found - eg. you haven't placed it in default directories, add the path at Additional Library Directories .