virtual/opencl
dev-util/clinfo
dev-util/opencl-headers

opencl-cpu?
      ( amd64?
            ( ||
                  ( dev-libs/pocl dev-util/intel-ocl-sdk )
             )
       )

video_cards_amdgpu?
      ( dev-libs/rocm-opencl-runtime )

video_cards_intel?
      ( dev-libs/intel-compute-runtime )

video_cards_i915?
      ( dev-libs/intel-compute-runtime )

video_cards_i965?
      ( dev-libs/intel-compute-runtime )

video_cards_nvidia?
      ( x11-drivers/nvidia-drivers )