OpenCL Installation Instructions

Windows

AMD: Install the AMD APP SDK.

Nvidia: Install the CUDA SDK.

Mac OSX

OpenCL is part of the Apple Developer Tools. You can access the OpenCL runtime by installing Xcode, or by installing the Xcode Command Line Tools via xcode-select --install and following the prompts.

Linux

This one I'm a bit more fuzzy on.

Nvidia support should be available under most package managers, e.g. sudo apt-get install nvidia-opencl-dev.

AMD should work with sudo apt-get install fglrx-dev, but your mileage may vary.

You may also need to sudo apt-get install opencl-headers. Substitute your distro's package manager where appropriate.