title: CMake 3.4.3 Can't find CUDA on windows
body: <p>I am trying to build something with CMake (it has to be an older version because of the project) and when I run it I get this error:</p>
  
  <pre><code>CMake Error at C:/Program Files (x86)/CMake/share/cmake-3.4/Modules/FindCUDA.cmake:617 (message):
    Specify CUDA_TOOLKIT_ROOT_DIR
  Call Stack (most recent call first):
    libethash-cuda/CMakeLists.txt:3 (FIND_PACKAGE)
  </code></pre>
  
  <p>I have looked everywhere online but I only find solutions for Linux.</p>