I'm trying to use Poco C++ library to do the simple http requests in C++ on Mac OS X 10.8.2. I installed Poco, copy-pasted the http_request.cc code from this tutorial, ran it with 'g++ -o http_get http_get.cc -lPocoNet', but got:

Undefined symbols for architecture x86_64:
  "Poco::StreamCopier::copyStream(std::basic_istream<char, std::char_traits<char> >&, std::basic_ostream<char, std::char_traits<char> >&, unsigned long)", referenced from:
      _main in ccKuZb1g.o
  "Poco::URI::URI(char const*)", referenced from:
      _main in ccKuZb1g.o
  "Poco::URI::~URI()", referenced from:
      _main in ccKuZb1g.o
  "Poco::URI::getPathAndQuery() const", referenced from:
      _main in ccKuZb1g.o
  "Poco::URI::getPort() const", referenced from:
      _main in ccKuZb1g.o
  "Poco::Exception::displayText() const", referenced from:
      _main in ccKuZb1g.o
  "typeinfo for Poco::Exception", referenced from:
      GCC_except_table1 in ccKuZb1g.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

Have been struggling with this for couple of hours. Any idea how to fix this? Thanks in advance!