Require CMake 4.0

[KyleFromNVIDIA]

Issue: rapidsai/build-planning#277

[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: 2e5a88e7-f7dd-454d-bdd7-5a291c326773

📥 Commits

Reviewing files that changed from the base of the PR and between f3ce958 and 9e905ae.

📒 Files selected for processing (2)

• dependencies.yaml
• python/rmm/pyproject.toml

✅ Files skipped from review due to trivial changes (1)

• python/rmm/pyproject.toml

🚧 Files skipped from review as they are similar to previous changes (1)

• dependencies.yaml

---

📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated the minimum required CMake version from 3.30.4 to 4.0 across build configurations, Conda environment specifications, package build metadata, and documentation to align project build requirements, packaging workflows, and developer/CI tooling.

Walkthrough

Update minimum required CMake version from 3.30.4 to 4.0 across documentation, CMakeLists, pyproject build-backend requires, and conda environment/recipe specifications.

Changes

CMake Minimum Version Update to 4.0

Layer / File(s)	Summary
Source configuration and documentation updates README.md, cmake/RAPIDS.cmake, cpp/CMakeLists.txt, cpp/examples/basic/CMakeLists.txt, python/librmm/CMakeLists.txt, python/rmm/CMakeLists.txt, python/librmm/pyproject.toml, python/rmm/pyproject.toml	Documentation and project CMake files updated to require CMake 4.0 instead of 3.30.4. Python build-backend tool.rapids-build-backend.requires entries updated to cmake>=4.0. Header copyright year ranges updated where present.
Conda environment and dependency specifications dependencies.yaml, conda/environments/*, conda/recipes/*/conda_build_config.yaml	Conda environment YAMLs, conda build config files, and the shared dependency anchor updated to require cmake>=4.0.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Suggested labels

non-breaking, improvement

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'Require CMake 4.0' directly and clearly summarizes the main change across all files in the changeset, which is updating the minimum CMake version requirement.
Description check	✅ Passed	The description references a related issue and is directly related to the changeset, which updates CMake version requirements throughout the repository.
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.

_{✏️ 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.}

[KyleFromNVIDIA]

/merge