title: How to determine OpenCV version
body: <p>How to determine which version of OpenCV I have installed?</p>
  
  <p><em>I am most interested in knowing a way of doing it programatically (and cross-platform)</em>, but I can't even find a way to determine the installed version from outside the code.</p>
  
  <p>I'm working with C++03, on Fedora.</p>