Using Builtin FindOpenCL Instead of Manual CMake

[EJainDev]

Since CMake 3.1, there is a built-in find_package(OpenCL) that can be used instead of the custom .cmake file to find OpenCL, should that be used instead since the minimum by default is already 3.1?

[CNugteren]

I guess that makes sense, yes. I guess if this is changed perhaps some of the documentation/error messages in CMakeLists.txt need to be updated once this is changed.

[EJainDev]

I was working on PR #649 and found that CMake can't detect OpenCL 3.0 before version 3.24, should we put this off then?

[CNugteren]

You mean it won't be able to find an OpenCL 3.0 installation unless you use CMake 3.24 or newer? That was released in 2022 so it is also not that new. So I think you can continue if you think this is useful, while keeping the CMake requirement to 3.10. Then you'll have to add a note in the README and perhaps a message in the CMakeLists to point to this for OpenCL 3.0 users.