CI test fail when using oclgrind or pocl

[StRigaud]

Issue with the build and deploy CI

Github action do not provide OpenCL compatible devices making tests impossible to run.

An alternative solution is to use oclgrind which simulate an OpenCL device but that still fail.

The error when running test is OpenCL-error -1001 "CL_PLATFORM_NOT_FOUND_KHR" which means that cl_khr_icd-extention have trouble to load the proper vendor driver.

Information:

• The current CI is only tested on Ubuntu for now.
• OpenCL installation is done by apt install apt install opencl-headers ocl-icd-dev ocl-icd-opencl-dev but maybe not necessary?
• Python package is managed by conda.

[StRigaud]

I was not using oclgrind properly.

changed the command
python -m pytest .
to
oclgrind python -m pytest . to run the test.

✔️ The good part is, it detect a platform.
🚫 The bad is it does not generate correct output and the test assert fail.

edit:
using oclgrind with CLIc pure works fine
using oclgrind with python wrapper return wrong values

[StRigaud]

Following this comment:

• Make CI work #6 (comment)

Using oclgrind or pocl for enabling opencl on CPU compile and run for pyclesperanto but return wrong values:

# run add_image_and_scalar kernel
input: [1. 1. 1. 1. 1. 1. 1. 1. 1.] float32
valid: [101. 101. 101. 101. 101. 101. 101. 101. 101.] float32
result: [4.7481553e+10 1.0000000e+02 4.7495971e+10 1.0000000e+02 4.7484436e+10
 1.0000000e+02 8.6149689e+25 1.0000000e+02 1.0000000e+02] float32

However, it works fine with CLIc alone.

[StRigaud]

The invalid results is solved, see this.

The remaining issue is the linking with libOpenCL.so not happening with the error ImportError: libOpenCL.so.1: cannot open shared object file: No such file or directory

Solving this should unlock a full CI build and test action