[slezyr]

https://aur.archlinux.org/packages/opencl-amd/

this one, part of amdgpu-pro

[greenpenguin]

I can confirm I don't have that installed. I'm using this: https://github.com/RadeonOpenCompute/ROCm-OpenCL-Runtime

Edit: actually Blender performance is decent, but the kernels take ~10 minutes to compile.