Fix packaged dlls not found #7108
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This PR introduced `winmode=0` for loading DLLs during import: isl-org#5259 This however leads to directories added via `os.add_dll_directory` not being considered, when loading DLLs (see isl-org#7104 (comment)). In particular this leads to open3d/tbb12.dll not being found. Fix this by going back to the default DLL-search mode (`winmode=None`). In order to still be able to find CUDA-DLLs, that are not part of the open3d-package, search their directory in PATH and explicitly add it to the DLL-search-locations for CUDA-builds.
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Motivation and Context
This PR introduced
winmode=0for loading DLLs during import. This however leads to directories added viaos.add_dll_directorynot being considered, when loading DLLs (see here or here). In particular this leads toopen3d/tbb12.dllnot being found.Fix this by going back to the default DLL-search mode (
winmode=None).In order to still be able to find CUDA-DLLs, that are not part of the open3d-package, search their directory in PATH and explicitly add it to the DLL-search-locations for CUDA-builds.
Note that this PR results in DLLs generally not being searched in
PATHanymore, when importingopen3d, as is the default behaviour of Python-packages since 3.8. The exception are CUDA-libraries in the heuristically determined directory. If anyone relies onPATHbeing searched, this PR breaks functionality.Checklist:
python util/check_style.py --applyto apply Open3D code styleto my code.
updated accordingly.
results (e.g. screenshots or numbers) here.
Description