[FEA]: Avoid loading non-supported dynamic libraries

[rwgk]

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Area

cuda.pathfinder

Is your feature request related to a problem? Please describe.

This is a request for a behavior change.

Currently, when encountering a library that we haven't plumbed in support for, we fall back to doing a system search, which can be surprising / confusing.

For example, currently we have (Linux):

• cuda-python/cuda_pathfinder/cuda/pathfinder/_dynamic_libs/load_dl_linux.py

  Line 130 in f3f4bcd

  candidate_sonames.append(f"lib{libname}.so")

Current behavior (note: cupti is not supported):

python -c 'from cuda import pathfinder; print(pathfinder.load_nvidia_dynamic_lib("cupti"))'

LoadedDL(abs_path='/usr/local/cuda/targets/sbsa-linux/lib/libcupti.so', was_already_loaded_from_elsewhere=False, _handle_uint=1073584928, found_via='system-search')

The request boils down to removing that line, which then leads to:

cuda.pathfinder._dynamic_libs.load_dl_common.DynamicLibNotFoundError: Failure finding "libcupti.so":

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The situation is different under Windows. Figuring out all details for all situations (Linux, Windows, site-packages, conda, CUDA_HOME, system-search) needs more work.

Describe the solution you'd like

TBD

Describe alternatives you've considered

No response

Additional context

No response