title: How do I output the result of a generator expression in CMake?
body: <p>I have the following simple CMake code:</p>
  
  <pre><code>cmake_minimum_required(VERSION 3.1)
  
  project(PrintGenerators)
  
  set(TEST_OR_GENERATOR "$&lt;$&lt;OR:0,0,1&gt;:YAY!&gt;")
  
  message(STATUS ${TEST_OR_GENERATOR}) # Print out the result of the build
  </code></pre>
  
  <p>I expect this code to print out <code>YAY!</code>, but it does not. I instead get <code>$&lt;$&lt;OR:0,0,1&gt;:YAY!&gt;</code> as the output. How do I print the result of the evaluated generator expression during configuration?</p>