Mention about Portable Computing Language (PoCL) to help in development

[arun-mani-j]

Hii.

Currently the Getting Started Guide for Linux mentions about installing the headers to develop the applications. But if they want to run the application, then they need an OpenCL implementation.

We have pocl-opencl-icd in Debian and other Linux distributions and similar tools for other operating systems. The guide can be updated to include details about PoCL too so users can use that as an entry-point to run and test their code.

[SunSerega]

I want to add that the major point of having such a 3rd party reference it in an official guide - is so people know how to run OpenCL-dependant code where no OpenCL implementation for GPU is available.

In my case, I needed to run tests requiring OpenCL support in GitHub Actions.
On Ubuntu, I also installed pocl-opencl-icd.
But on Windows, I found that Intel implementation works with any CPUs.

Does it make sense to add both to the respective guides?