Require CMake 4.0

c/CMakeLists.txt

@@ -5,7 +5,7 @@
 # cmake-format: on
 # =============================================================================
 
-cmake_minimum_required(VERSION 3.30.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 4.0 FATAL_ERROR)
 include(../cmake/rapids_config.cmake)
 include(rapids-cmake)
 include(rapids-cpm)

cmake/RAPIDS.cmake

@@ -1,14 +1,14 @@
 # =============================================================================
 # cmake-format: off
-# SPDX-FileCopyrightText: Copyright (c) 2021-2025, NVIDIA CORPORATION.
+# SPDX-FileCopyrightText: Copyright (c) 2021-2026, NVIDIA CORPORATION.
 # SPDX-License-Identifier: Apache-2.0
 # cmake-format: on
 # =============================================================================
 #
 # This is the preferred entry point for projects using rapids-cmake
 #
 # Enforce the minimum required CMake version for all users
-cmake_minimum_required(VERSION 3.30.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 4.0 FATAL_ERROR)
 
 # Allow users to control which version is used
 if(NOT (rapids-cmake-branch OR rapids-cmake-version))

conda/environments/all_cuda-129_arch-aarch64.yaml

@@ -10,7 +10,7 @@ dependencies:
 - c-compiler
 - clang-tools==20.1.8
 - clang==20.1.8
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-nvcc
 - cuda-nvrtc-dev
 - cuda-nvtx-dev

conda/environments/all_cuda-129_arch-x86_64.yaml

@@ -10,7 +10,7 @@ dependencies:
 - c-compiler
 - clang-tools==20.1.8
 - clang==20.1.8
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-nvcc
 - cuda-nvrtc-dev
 - cuda-nvtx-dev

conda/environments/all_cuda-131_arch-aarch64.yaml

@@ -10,7 +10,7 @@ dependencies:
 - c-compiler
 - clang-tools==20.1.8
 - clang==20.1.8
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-nvcc
 - cuda-nvrtc-dev
 - cuda-nvtx-dev

conda/environments/all_cuda-131_arch-x86_64.yaml

@@ -10,7 +10,7 @@ dependencies:
 - c-compiler
 - clang-tools==20.1.8
 - clang==20.1.8
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-nvcc
 - cuda-nvrtc-dev
 - cuda-nvtx-dev

conda/environments/bench_ann_cuda-129_arch-aarch64.yaml

@@ -9,7 +9,7 @@ dependencies:
 - clang-tools==20.1.8
 - clang==20.1.8
 - click
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-nvcc
 - cuda-nvrtc-dev
 - cuda-nvtx-dev

conda/environments/bench_ann_cuda-129_arch-x86_64.yaml

@@ -9,7 +9,7 @@ dependencies:
 - clang-tools==20.1.8
 - clang==20.1.8
 - click
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-nvcc
 - cuda-nvrtc-dev
 - cuda-nvtx-dev

conda/environments/bench_ann_cuda-131_arch-aarch64.yaml

@@ -9,7 +9,7 @@ dependencies:
 - clang-tools==20.1.8
 - clang==20.1.8
 - click
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-nvcc
 - cuda-nvrtc-dev
 - cuda-nvtx-dev

conda/environments/bench_ann_cuda-131_arch-x86_64.yaml

@@ -9,7 +9,7 @@ dependencies:
 - clang-tools==20.1.8
 - clang==20.1.8
 - click
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-nvcc
 - cuda-nvrtc-dev
 - cuda-nvtx-dev

conda/environments/go_cuda-129_arch-aarch64.yaml

@@ -9,7 +9,7 @@ dependencies:
 - c-compiler
 - clang-tools==20.1.8
 - clang==20.1.8
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-cudart-dev
 - cuda-nvcc
 - cuda-nvrtc-dev

conda/environments/go_cuda-129_arch-x86_64.yaml

@@ -9,7 +9,7 @@ dependencies:
 - c-compiler
 - clang-tools==20.1.8
 - clang==20.1.8
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-cudart-dev
 - cuda-nvcc
 - cuda-nvrtc-dev

conda/environments/go_cuda-131_arch-aarch64.yaml

@@ -9,7 +9,7 @@ dependencies:
 - c-compiler
 - clang-tools==20.1.8
 - clang==20.1.8
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-cudart-dev
 - cuda-nvcc
 - cuda-nvrtc-dev

conda/environments/go_cuda-131_arch-x86_64.yaml

@@ -9,7 +9,7 @@ dependencies:
 - c-compiler
 - clang-tools==20.1.8
 - clang==20.1.8
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-cudart-dev
 - cuda-nvcc
 - cuda-nvrtc-dev

conda/environments/rust_cuda-129_arch-aarch64.yaml

@@ -6,7 +6,7 @@ channels:
 - conda-forge
 dependencies:
 - c-compiler
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-cudart-dev
 - cuda-nvcc
 - cuda-nvrtc-dev

conda/environments/rust_cuda-129_arch-x86_64.yaml

@@ -6,7 +6,7 @@ channels:
 - conda-forge
 dependencies:
 - c-compiler
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-cudart-dev
 - cuda-nvcc
 - cuda-nvrtc-dev

conda/environments/rust_cuda-131_arch-aarch64.yaml

@@ -6,7 +6,7 @@ channels:
 - conda-forge
 dependencies:
 - c-compiler
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-cudart-dev
 - cuda-nvcc
 - cuda-nvrtc-dev

conda/environments/rust_cuda-131_arch-x86_64.yaml

@@ -6,7 +6,7 @@ channels:
 - conda-forge
 dependencies:
 - c-compiler
-- cmake>=3.30.4
+- cmake>=4.0
 - cuda-cudart-dev
 - cuda-nvcc
 - cuda-nvrtc-dev

conda/recipes/cuvs-bench-cpu/conda_build_config.yaml

@@ -11,7 +11,7 @@ c_stdlib_version:
   - "2.28"
 
 cmake_version:
-  - ">=3.30.4"
+  - ">=4.0"
 
 glog_version:
   - ">=0.6.0"

conda/recipes/cuvs/conda_build_config.yaml

@@ -14,4 +14,4 @@ c_stdlib_version:
   - "2.28"
 
 cmake_version:
-  - ">=3.30.4"
+  - ">=4.0"

conda/recipes/libcuvs/conda_build_config.yaml

@@ -14,7 +14,7 @@ c_stdlib_version:
   - "2.28"
 
 cmake_version:
-  - ">=3.30.4"
+  - ">=4.0"
 
 h5py_version:
   - ">=3.8.0"

cpp/CMakeLists.txt

@@ -3,7 +3,7 @@
 # SPDX-FileCopyrightText: Copyright (c) 2020-2026, NVIDIA CORPORATION.
 # SPDX-License-Identifier: Apache-2.0
 # cmake-format: on
-cmake_minimum_required(VERSION 3.30.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 4.0 FATAL_ERROR)
 include(../cmake/rapids_config.cmake)
 include(rapids-cmake)
 include(rapids-cpm)

dependencies.yaml

@@ -238,7 +238,7 @@ dependencies:
     common:
       - output_types: [conda, requirements, pyproject]
         packages:
-          - &cmake_ver cmake>=3.30.4
+          - &cmake_ver cmake>=4.0
           - ninja
       - output_types: [conda]
         packages:

examples/c/CMakeLists.txt

@@ -4,7 +4,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # cmake-format: on
 
-cmake_minimum_required(VERSION 3.30.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 4.0 FATAL_ERROR)
 
 # ------------- configure rapids-cmake --------------#
 

examples/cpp/CMakeLists.txt

@@ -4,7 +4,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # cmake-format: on
 
-cmake_minimum_required(VERSION 3.30.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 4.0 FATAL_ERROR)
 
 # ------------- configure rapids-cmake --------------#
 

java/docker-build/Dockerfile

@@ -1,5 +1,5 @@
 #
-# SPDX-FileCopyrightText: Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
+# SPDX-FileCopyrightText: Copyright (c) 2025-2026, NVIDIA CORPORATION. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 #
 
@@ -28,7 +28,7 @@ ARG DEV_BUILD=OFF
 # Dependency versions
 # Act as default GCC toolset in the image
 ARG TOOLSET_VERSION=14
-ARG CMAKE_VERSION=3.30.4
+ARG CMAKE_VERSION=4.0
 ARG CCACHE_VERSION=4.11.2
 
 # Default x86_64 from x86 build, aarch64 cmake for arm build

java/docker-build/README.md

@@ -113,7 +113,7 @@ The Docker image is based on `nvidia/cuda:{CUDA_VERSION}-devel-rockylinux9` and
 
 - **CUDA Development Tools**: Complete CUDA toolkit for the specified version
 - **GCC Toolset 14**: Modern C++ compiler with C++20 support
-- **CMake 3.30.4**: Build system generator
+- **CMake 4.0**: Build system generator
 - **JDK 22**: Java Development Kit with Panama FFM support
 - **Maven**: Java project management and build tool
 - **ccache**: Compiler cache for faster incremental builds

java/internal/CMakeLists.txt

@@ -1,11 +1,11 @@
 # =============================================================================
 # cmake-format: off
-# SPDX-FileCopyrightText: Copyright (c) 2025, NVIDIA CORPORATION.
+# SPDX-FileCopyrightText: Copyright (c) 2025-2026, NVIDIA CORPORATION.
 # SPDX-License-Identifier: Apache-2.0
 # cmake-format: on
 # =============================================================================
 
-cmake_minimum_required(VERSION 3.30.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 4.0 FATAL_ERROR)
 
 include(../../cmake/rapids_config.cmake)
 include(rapids-cmake)

python/cuvs/CMakeLists.txt

@@ -5,7 +5,7 @@
 # cmake-format: on
 # =============================================================================
 
-cmake_minimum_required(VERSION 3.30.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 4.0 FATAL_ERROR)
 
 include(../../cmake/rapids_config.cmake)
 

python/cuvs/pyproject.toml

@@ -106,7 +106,7 @@ regex = "(?P<value>.*)"
 
 [tool.rapids-build-backend]
 requires = [
-    "cmake>=3.30.4",
+    "cmake>=4.0",
     "cuda-python>=13.0.1,<14.0",
     "cython>=3.2.2",
     "libcuvs==26.6.*,>=0.0.0a0",

python/libcuvs/CMakeLists.txt

@@ -5,7 +5,7 @@
 # cmake-format: on
 # =============================================================================
 
-cmake_minimum_required(VERSION 3.30.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 4.0 FATAL_ERROR)
 
 include(../../cmake/rapids_config.cmake)
 

python/libcuvs/pyproject.toml

@@ -80,7 +80,7 @@ regex = "(?P<value>.*)"
 [tool.rapids-build-backend]
 build-backend = "scikit_build_core.build"
 requires = [
-    "cmake>=3.30.4",
+    "cmake>=4.0",
     "libraft==26.6.*,>=0.0.0a0",
     "librmm==26.6.*,>=0.0.0a0",
     "ninja",