That is not a link. This is a link.

I do not see any errors there, just warnings emitted by the C compiler. The pcap source code is not so clean, but I can see it compiled okay.

You cut off the pasted log in the middle of the testing step. It should end in the following or similar.

All tests successful.
Files=30, Tests=549, 11 wallclock secs ( 0.76 usr  0.05 sys +  8.59 cu
+sr  0.72 csys = 10.12 CPU)
Result: PASS
  SAPER/Net-Pcap-0.16.tar.gz
  /usr/bin/make test -- OK
[download]

Afterwards you run make install to install the module.