title: undefined reference to boost::program_options in xubuntu
body: <p>I have this file</p>
  
  <pre><code>#include &lt;boost/program_options.hpp&gt;
  namespace po = boost::program_options;
  
  #include &lt;iostream&gt;
  using namespace std;
  
  int main(int ac, char* av[])
  {
      try {
  
      po::options_description desc("Allowed options");
          desc.add_options()
              ("help", "produce help message")
          ;
  
      }
      catch(exception&amp; e) {
          cerr &lt;&lt; "error: " &lt;&lt; e.what() &lt;&lt; "\n";
          return 1;
      }
      catch(...) {
          cerr &lt;&lt; "Exception of unknown type!\n";
      }
  
      return 0;
  }
  </code></pre>
  
  <p>Now I am trying to compile like this: </p>
  
  <blockquote>
    <p>g++ -I /usr/include/boost/ -I /usr/include/boost/program_options
    main.cpp -L /usr/lib/x86_64-linux-gnu/ -lboost_program_options</p>
  </blockquote>
  
  <p>and I am receiving this</p>
  
  <blockquote>
    <p>undefined reference to
    `boost::program_options::options_description::options_description(std::__cxx11::basic_string, std::allocator > const&amp;, unsigned int,
    unsigned int)'</p>
  </blockquote>
  
  <p>I don't know why it is failing, the library is there and the header file too. What goes wrong? I am using boost 1.55.0</p>
  
  <pre><code>administrator@administrator-VirtualBox:~/l/b$ sudo updatedb
  administrator@administrator-VirtualBox:~/l/b$ locate libboost_program_options
  /usr/lib/x86_64-linux-gnu/libboost_program_options.a
  /usr/lib/x86_64-linux-gnu/libboost_program_options.so
  /usr/lib/x86_64-linux-gnu/libboost_program_options.so.1.55.0
  </code></pre>