Require CMake 4.0

[KyleFromNVIDIA]

Issue: rapidsai/build-planning#277

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Review profile: CHILL

Plan: Enterprise

Run ID: 60e40649-0ea6-42b7-8fc5-48bbaa12407c

📥 Commits

Reviewing files that changed from the base of the PR and between 9584f34 and d298fd2.

📒 Files selected for processing (19)

• BUILD.md
• cmake/RAPIDS.cmake
• conda/environments/all_cuda-129_arch-aarch64.yaml
• conda/environments/all_cuda-129_arch-x86_64.yaml
• conda/environments/all_cuda-132_arch-aarch64.yaml
• conda/environments/all_cuda-132_arch-x86_64.yaml
• conda/environments/clang_tidy_cuda-129_arch-x86_64.yaml
• conda/environments/clang_tidy_cuda-132_arch-x86_64.yaml
• conda/environments/cpp_all_cuda-129_arch-x86_64.yaml
• conda/environments/cpp_all_cuda-132_arch-x86_64.yaml
• conda/recipes/cuml/conda_build_config.yaml
• conda/recipes/libcuml/conda_build_config.yaml
• cpp/CMakeLists.txt
• dependencies.yaml
• python/cuml/CMakeLists.txt
• python/cuml/README.md
• python/cuml/pyproject.toml
• python/libcuml/CMakeLists.txt
• python/libcuml/pyproject.toml

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📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated minimum required CMake version to 4.0 across all build and environment configurations.

Walkthrough

This PR uniformly updates the minimum CMake version requirement from 3.30.4 to 4.0 across build configurations, dependency definitions, conda environments, and documentation throughout the cuML repository.

Changes

CMake 4.0 Requirement Update

Layer / File(s)	Summary
Core CMake minimum version requirements cmake/RAPIDS.cmake, cpp/CMakeLists.txt, python/cuml/CMakeLists.txt, python/libcuml/CMakeLists.txt	CMake minimum required version is bumped to 4.0 in the RAPIDS cmake module and all CMakeLists.txt entry points.
Central dependency version definition dependencies.yaml	The shared CMake version anchor is updated to 4.0, affecting downstream conda environment generation and build system configuration.
Build backend and recipe configuration conda/recipes/cuml/conda_build_config.yaml, conda/recipes/libcuml/conda_build_config.yaml, python/cuml/pyproject.toml, python/libcuml/pyproject.toml	Conda build config files and Python build backend requirements are updated to require CMake 4.0.
Generated environments and documentation conda/environments/all_cuda-129_arch-aarch64.yaml, conda/environments/all_cuda-129_arch-x86_64.yaml, conda/environments/all_cuda-132_arch-aarch64.yaml, conda/environments/all_cuda-132_arch-x86_64.yaml, conda/environments/clang_tidy_cuda-129_arch-x86_64.yaml, conda/environments/clang_tidy_cuda-132_arch-x86_64.yaml, conda/environments/cpp_all_cuda-129_arch-x86_64.yaml, conda/environments/cpp_all_cuda-132_arch-x86_64.yaml, BUILD.md, python/cuml/README.md	All conda environment definitions and build documentation are updated to reflect the CMake 4.0 requirement.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested labels

improvement, non-breaking

Suggested reviewers

• bdice
• vyasr
• csadorf

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Require CMake 4.0' clearly and directly summarizes the main change: updating the CMake minimum version requirement from 3.30.4 to 4.0 across the entire codebase.
Description check	✅ Passed	The description provides a reference to the related issue (#277) that motivated this change, which is relevant to understanding the context and rationale for the CMake version bump.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[KyleFromNVIDIA]

/merge