This is a potential solution to make a single OpenCL Docker image run on different hosts with different accelerators.

The simple C code "src/demo.c" is linked against a generic OpenCL Installable Client Driver (ICD) Loader. When the Docker container is run "as is", no OpenCL platform is available and the demo will print

$ docker run astrocontainers/opencl-icd-demo
Failed to obtain platform IDs

Nevertheless, when the host OpenCL platform is passed to the container by using the bin/opencl-icd-flags script, the ICD loader can dynamically load the platform. If the "beignet-opencl-icd" is installed,

sudo apt install beignet-opencl-icd

then the demo will print

$ docker run $(bin/opencl-icd-flags) astrocontainers/opencl-icd-demo
1 platform is found:
	* Intel Gen OCL Driver by Intel: OpenCL 2.0 beignet 1.3

Known Issues

• The demo code only prints the platform name. We should add a minimal computation example to make sure that the OpenCL JIT compiler works correctly.

• So far the demo only works for the beignet-opencl-icd driver. For other drivers to work, it is important to follow all the dependencies of the OpenCL ICD, which is tricky.