Noisy warning on environment activation when ffmpeg or libopencv are installed in an environment on Linux

[traversaro]

Comment:

Since conda-forge/openvino-feedstock#73 has been merged, all the new environments in which I install opencv or ffmpeg get a big and scary warning:

WARNING: No ICDs were found. Either,
- Install a conda package providing a OpenCL implementation (pocl, oclgrind, intel-compute-runtime, beignet) or
- Make your system-wide implementation visible by installing ocl-icd-system conda package.

This warning actually comes from the ocl-icd package, that comes from the libopencv --> libopenvino-intel-gpu-plugin --> ocl-icd dependency chain. The warning is printed on every environment activation, and kind of confuses users, especially the one that do not care or even do not know anything about OpenCL. I do not have any specific opinion on OpenCL so removing ocl-icd-system may be perfectly fine for me, but do you think we could avoid this extremely noisy warning?

fyi @conda-forge/ffmpeg @conda-forge/opencv @conda-forge/openvino @conda-forge/ocl-icd

[matthiasdiener]

I'd be supportive of removing the warning (in https://github.com/conda-forge/ocl-icd-feedstock/blob/main/recipe/activate.sh).

[iamanigeeit]

Worse still: the double square brackets [[ ]] syntax is specific to bash and running on sh will make activation fail.

[traversaro]

fyi @xela-95

[vvzen]

I'd second removing the warning, or at least logging to stderr, as common practice in UNIX.

ocl-icd-feedstock/recipe/activate.sh

Line 3 in dfffb6a

echo "WARNING: No ICDs were found. Either,";

The fact that the logging happens on stdout will break all CLIs that activate an environment and run things programmatically, for example a python3 -m pip list --json .

e.g.:

bash -lc 'conda activate /path/to/my/env && python3 -m pip list --format json' | jq

gets forced to become:

bash -lc 'conda activate /path/to/my/env 1>/dev/null && python3 -m pip list --format json' | jq

[xela-95]

fyi @flferretti

[hmaarrfk]

🎆 sorry for the accidental click

[traversaro]

Thanks a lot @matthiasdiener !