# Installation
CUDA + cuDNN Installation:
- Install Cuda (2 options):
  - Download from NVIDIA website.  Will install to `/Developer/NVIDIA/CUDA=#-#` (macOS / OS X), with symlinks in `/usr/local/cuda/`.
  - Alternatively, use `brew cask install cuda`.
- macOS / OS X:
  - Add an extra softlink for tensorflow:
    - `sudo ln -sf /usr/local/cuda/lib/libcuda.dylib /usr/local/cuda/lib/libcuda.1.dylib`
- Download CuDNN from NVIDIA website into `local_cudnn_path`, then:
  - `sudo mkdir /usr/local/cudnn`
  - `sudo cp -r local_cudnn_path/* /usr/local/cudnn/`
- Setup paths in `~/.bash_profile`:
  - `export CUDA_HOME=/usr/local/cuda`
  - `export CUDNN_HOME=/usr/local/cudnn`
  - macOS / OS X:
    - `export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:$CUDA_HOME/lib:$CUDNN_HOME/lib`
  - Linux:
    - `sudo apt-get install libcupti-dev`
    - `export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$CUDA_HOME/lib64:$CUDNN_HOME/lib64:$CUDA_HOME/extras/CUPTI/lib64`
- Test:

  ```
  cp -r /usr/local/cuda/samples ~/cuda-samples
  pushd ~/cuda-samples
  make
  popd
  ~/cuda-samples/bin/x86_64/darwin/release/deviceQuery
  ```