title: undefined reference to boost::system::system_category() when compiling
body: <p>I'm trying to compile a program on Ubuntu 11.10 that uses the Boost libraries. I have the 1.46-dev Boost libraries from the Ubuntu Repository installed, but I get an error when compiling the program.</p>
  
  <p><code>undefined reference to boost::system::system_category()</code></p>
  
  <p>What is it that I do wrong?</p>