Tested in Ubuntu 15.10 NVIDIA 352, OpenCL 1.2.
The day we do OpenCL 2.0, it will be put inside a subdirectory and clearly labeled.
For benchmarks, make sure to use 0=3:
make O=3
On Ubuntu 15.10 with an NVIDIA NVS 5400M, Lenovo T430: http://askubuntu.com/questions/541114/how-to-make-opencl-work-on-14-10-nvidia-331-89-drivers/693043#693043