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Revert to having NCCL linkage as PRIVATE CMake option #1395

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divyegala wants to merge 2 commits intorapidsai:branch-25.10from
divyegala:undo-nccl-leak
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Revert to having NCCL linkage as PRIVATE CMake option #1395
divyegala wants to merge 2 commits intorapidsai:branch-25.10from
divyegala:undo-nccl-leak

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@divyegala divyegala commented Sep 29, 2025

Introduced in #1317, this caused us to see test failures in cuML as described in rapidsai/cuml#7277.

During the triaging process, we found out the cause was libcuml++.so requiring a dynamic link to libnccl.so, and it was picking up an older system installation of the aforementioned instead of the wheel. But, we believe that the correct fix is that cuVS stop leaking its NCCL dependency.

cc @csadorf

@divyegala divyegala self-assigned this Sep 29, 2025
@divyegala divyegala requested a review from a team as a code owner September 29, 2025 21:31
@divyegala divyegala added bug Something isn't working non-breaking Introduces a non-breaking change labels Sep 29, 2025
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