title: How to show the configuration of my CMake?
body: <p>I'm looking for a command like <code>cmake --features</code> or <code>cmake --config</code> which shows me how my CMake executable was built. For example, I want to know weather the flags like <code>--system-bzip2</code> really did get used and check the paths to the libraries CMake uses.</p>
  
  <p>I am not interested in knowing what features are available on which CMake version, but which options were actually used in the build.</p>