radeon – How to install OpenCL on Ubuntu 20.04?

How to install OpenCL on Ubuntu 20.04 ( I have as gpu amd-radeon)

I did the command “sudo apt search opencl” to check whether a package is already there. but not too sure whether or not the file is there … And if yes which file is the correct one?

nvidia-visual-profiler/hirsute,hirsute 11.2.152~11.2.2-1ubuntu1 amd64
  NVIDIA Visual Profiler for CUDA and OpenCL

ocl-icd-dev/hirsute,hirsute 2.2.14-2 amd64
  Development files to build an OpenCL ICD

ocl-icd-libopencl1/hirsute,hirsute,now 2.2.14-2 amd64 (installed,automatic)
  Generic OpenCL ICD Loader

ocl-icd-opencl-dev/hirsute,hirsute 2.2.14-2 amd64
  OpenCL development files

oclgrind/hirsute,hirsute 19.10-3 amd64
  OpenCL device simulator

opencl-1.2-html-doc/hirsute,hirsute,hirsute,hirsute 1.0~svn33624-5 all
  OpenCL 1.2 documentation - html pages

opencl-1.2-man-doc/hirsute,hirsute,hirsute,hirsute 1.0~svn33624-5 all
  OpenCL 1.2 documentation - man pages (experimental)

opencl-c-headers/hirsute,hirsute,hirsute,hirsute 3.0~2020.12.18-1 all
  OpenCL (Open Computing Language) C header files

opencl-clhpp-headers/hirsute,hirsute,hirsute,hirsute 3.0~2.0.13-1 all
  C++ headers for OpenCL development

opencl-clhpp-headers-doc/hirsute,hirsute,hirsute,hirsute 3.0~2.0.13-1 all
  documentation for C++ OpenCL headers

opencl-headers/hirsute,hirsute,hirsute,hirsute 3.0~2020.12.18-1 all
  OpenCL (Open Computing Language) header files

openclipart/hirsute,hirsute,hirsute,hirsute 1:0.18+dfsg-19ubuntu2 all
  Open Clip Art Library

thx