Compatibility issues with intel-opencl-icd_22.14.22890-1_amd64 build

[Franck Charras]

I'm trying to run SYCL-based software on gpu (using dpctl:https://github.com/IntelPython/dpctl) and it requires the compute runtime to be installed to detect gpu devices.

The issue I have is that using the ubuntu build (installed with: `apt-get install intel-opencl-icd`) the gpu devices are not detected. The same version downloaded from github: https://github.com/intel/compute-runtime/releases/tag/22.14.22890 works. But for end users it's much easier to use the build available in the official repositories.

What differences in those two builds could explain this ?

I don't know if this is a bug on the SYCL side or something related to customization of the ubuntu build. I've mirrored the issue on intel/compute-runtime github: https://github.com/intel/compute-runtime/issues/588 . Considering also opening an issue on https://github.com/intel/llvm/ .

Tested on ubuntu focal and ubuntu jammy, using official latest ubuntu docker images.

[Franck Charras (fcharras)]

Additionnal issue opened on the SYCL side: https://github.com/intel/llvm/issues/7659

[Olivier Grisel (olivier-grisel)]

As discussed in the upstream issue:

https://github.com/intel/compute-runtime/issues/588#issuecomment-1401498033

The problem with Ubuntu version of this package seems to be caused by a missing dynamically linked `libopencl-clang.so.10` with the Ubuntu installed `libigdfcl.so.1`:

```
$ ldd /lib/x86_64-linux-gnu/libigdfcl.so.1
        linux-vdso.so.1 (0x00007ffd8d7e8000)
        libopencl-clang.so.10 => not found
```

This problem does not happen when manually installing all the dependencies with wget/dpkg as explained in the upstream repo:

https://github.com/intel/compute-runtime/releases/

There is probably a package metadata issue that prevents `apt` to automatically install everything as required.

Furthermore, this problem is also being discussed here:

https://github.com/IntelPython/dpctl/issues/1010

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Olivier Grisel (olivier-grisel)]

I think this package is maintained upstream by debian maintainers at:

https://salsa.debian.org/opencl-team

where there is some recent activity.

It would be worth checking if we can reproduce the problem in a debian sid docker container.