title: Install openCV with CUDA toolkit 8.0
body: <p>I'm trying to install Opencv 3.2.0 and Nvidia CUDA toolkit 8.0 on Ubuntu 16.04 but I can't configure them together. I get the following error when I try to make project using both:</p>
  
  <pre><code>CMake Error at /usr/share/cmake-3.5/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
      Could NOT find CUDA: Found unsuitable version "8.0", but required is exact
      version "7.5" (found /usr/local/cuda)
  Call Stack (most recent call first):
      /usr/share/cmake-3.5/Modules/FindPackageHandleStandardArgs.cmake:386 (_FPHSA_FAILURE_MESSAGE)
      /usr/share/cmake-3.5/Modules/FindCUDA.cmake:949 (find_package_handle_standard_args)
  
      /usr/local/share/OpenCV/OpenCVConfig.cmake:86 (find_package)
      /usr/local/share/OpenCV/OpenCVConfig.cmake:105 (find_host_package)
  CMakeLists.txt:10 (find_package)
  
  
  -- Configuring incomplete, errors occurred!
  </code></pre>
  
  <p>I have tried installing cuda toolkit 7.5 but its not compatible with ubuntu 16.04 I believe. I'm really clueless now, I hope someone can help with this. 
  Thanks</p>