$ gcc -o test.exe test.c -lwpcap
test.c:1: error: parse error before '<' token
test.c:6: error: `PCAP_ERRBUF_SIZE' undeclared here (not in a function)
test.c:13: error: parse error before "if"
test.c:22: warning: parameter names (without types) in function declaration
test.c:22: warning: data definition has no type or storage class
test.c:23: error: parse error before "return"
test.c:6: error: storage size of `errbuf' isn't known
test.c:8: error: storage size of `fcode' isn't known