Fix KDE score_samples symbol exports

[csadorf]

Export the KDE score_samples template instantiations and namespace symbols so the Python extension can resolve them at import time.

[jcrist]

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 844e5f8c-850b-449b-800f-f223f78e4d66

📥 Commits

Reviewing files that changed from the base of the PR and between a402255 and d862ab4.

📒 Files selected for processing (2)

• cpp/include/cuml/neighbors/kde.hpp
• cpp/src/kde/kde.cu

---

📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated KDE module symbol export declarations for improved library integration.

Walkthrough

The PR updates the KDE score_samples API to apply CUML_EXPORT macro for explicit symbol visibility. The header namespace is wrapped with CUML_EXPORT, and explicit template instantiations in the source are marked with CUML_EXPORT to ensure consistent visibility of both declarations and compiled specializations.

Changes

KDE API Export Visibility

Layer / File(s)	Summary
Header namespace export wrapping cpp/include/cuml/neighbors/kde.hpp	Adds cuml/common/export.hpp include and wraps ML::KDE namespace with namespace CUML_EXPORT ML { namespace KDE { ... } }, then updates closing braces to match the nested structure.
Explicit template instantiation export cpp/src/kde/kde.cu	Marks explicit template instantiations of score_samples<float> and score_samples<double> with CUML_EXPORT macro for consistent compiled symbol visibility.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• rapidsai/cuml#7833: Introduces KDE score_samples template and explicit instantiations; this PR adds export visibility to those same APIs.

Suggested labels

CUDA/C++, improvement, Cython / Python

Suggested reviewers

• jcrist
• cjnolet
• betatim
• viclafargue

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Fix KDE score_samples symbol exports' directly and clearly summarizes the main change: adding export qualifiers to KDE score_samples symbols in the namespace and template instantiations.
Description check	✅ Passed	The description accurately relates to the changeset, explaining that the change exports KDE score_samples template instantiations and namespace symbols for Python extension resolution at import time, which matches the actual code modifications.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[dantegd]

/merge