title: Cmake cannot find dependent library
body: <p>I am trying to build the library <a href="https://github.com/mosra/magnum" rel="nofollow">https://github.com/mosra/magnum</a>, which depends on a project <a href="https://github.com/mosra/corrade" rel="nofollow">https://github.com/mosra/corrade</a> on windows.</p>
  
  <p>I am following the installation instruction, first, i build the corrade library by going into corrade/build/ and running cmake ..</p>
  
  <p>Then, I go into the magnum/build directory and run cmake ..</p>
  
  <p>But I get an</p>
  
  <pre><code>CMake Error at C:/Program Files/CMake/share/cmake-     3.6/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
  Could NOT find Corrade (missing: CORRADE_INCLUDE_DIR
  _CORRADE_CONFIGURE_FILE)
  </code></pre>
  
  <p>I tried setting the CORRADE_INCLUDE_DIR env variable, but that did not work.  I also tried moving the corrade library into the magnum/modules/ folder, but still to no avail.</p>
  
  <p>I am fairly new to cmake, and have been attempting to fix this for a while.  Any help is greatly appreciated.</p>
  
  <p>Thanks</p>