title: Displaying CMake variables
body: <p>Suppose I have a package called Foo. If I run CMake on a CMakeLists.txt file that contains <code>find_package(Foo)</code>, then I can print out the values of variables such as <code>${Foo_LIBRARIES}</code> and <code>${Foo_INCLUDES}</code>.</p>
  
  <p>Is there an easy way to display these variables without having to run CMake on a CMakeLists.txt file, and without having to manually inspect the config.cmake file?</p>