PyInstaller: FileNotFoundError: cilacc library not found

[samtygier-stfc]

Summary

When building a MI package with pyinstaller, the libcilacc.so from cil is no longer being picked up.

This seems to be a change in cil 25.0.0 vs 24.0.0. Within the conda environment the library has moved from
~/miniforge3/envs/mantidimaging-dev/lib/libcilacc.so
to
~/miniforge3/envs/mantidimaging-dev/lib/python3.12/site-packages/cil/lib/libcilacc.so

Steps To Reproduce

Build the pyinstaller package, from the packaging directory run
python PackageWithPyInstaller.py
then try to run the package
./dist/MantidImaging/MantidImaging

Current Behaviour

With cil 25.0.0 I get

Traceback (most recent call last):
  File "cil/framework/cilacc.py", line 28, in <module>
StopIteration

During handling of the above exception, another exception occurred:
...
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "PyInstaller/loader/pyimod02_importers.py", line 457, in exec_module
  File "cil/framework/cilacc.py", line 30, in <module>
FileNotFoundError: cilacc library not found
[PYI-75123:ERROR] Failed to execute script '__main__' due to unhandled exception

Expected Behaviour

Builds working package

Context

Current main, on linux

Failure Logs

Screenshot(s)

[samtygier-stfc]

I suspect this might be related to changes in TomographicImaging/CIL#2145 . There are changes to the CMakeFile that might be moving the location. Also changes to the import.

You can also see the difference running this in python:

from PyInstaller.utils.hooks import conda_support; print("\n".join([str(t[0]) for t in conda_support.collect_dynamic_libs("cil", dependencies=True) if "cil" in t[0]  ]))

ignoring the warnings. With 24.0.0 I see
/home/sam/miniforge3/envs/mantidimaging-dev/lib/libcilacc.so
but with 25.0.0 I see nothing