allow better CMake version testing (#5727)

* add cmake latest workflow with lukka/get-cmake@latest
* Upgrade minimum CMake version to 3.26

.github/workflows/arm-main-cmake.yml

@@ -4,6 +4,10 @@ name: hdf5 dev CMake CI
 on:
   workflow_call:
     inputs:
+      cmake_version:
+        description: "3.26.0 or later, latest"
+        required: true
+        type: string
       thread_safety:
         description: "TS or empty"
         required: true
@@ -16,6 +20,11 @@ on:
         description: "release vs. debug build"
         required: true
         type: string
+      save_binary:
+        description: "binary-ext-name or missing"
+        required: false
+        default: "skip"
+        type: string
 
 permissions:
   contents: read
@@ -31,6 +40,18 @@ jobs:
         with:
           version: "1.13.2"
 
+      - name: Install CMake
+        uses: lukka/get-cmake@latest
+        with:
+          cmakeVersion: ${{ inputs.cmake_version }}
+          ninjaVersion: latest
+
+      - name: Check CMake Version
+        shell: bash
+        run: |
+          which cmake
+          cmake --version
+
       - name: Set environment for MSVC (Windows)
         run: |
           # Set these environment variables so CMake picks the correct compiler
@@ -132,10 +153,10 @@ jobs:
       - name: Save published binary (Windows)
         uses: actions/upload-artifact@v4
         with:
-              name: zip-vs2022_cl-${{ inputs.build_mode }}-arm-binary
+              name: zip-vs2022_cl-${{ inputs.build_mode }}-${{ inputs.save_binary }}-binary
               path: ${{ runner.workspace }}/build/HDF5-*-win64.zip
               if-no-files-found: error # 'warn' or 'ignore' are also available, defaults to `warn`
-        if:  ${{ (inputs.thread_safety != 'TS') && (inputs.concurrent != 'CC') && ( inputs.build_mode != 'Debug') }}
+        if:  ${{ (inputs.thread_safety != 'TS') && (inputs.concurrent != 'CC') && ( inputs.save_binary != 'skip') }}
 
   build_and_test_linux:
     name: "Ubuntu gcc-${{ inputs.build_mode }}-${{ inputs.thread_safety }}-${{ inputs.concurrent }}"
@@ -243,10 +264,10 @@ jobs:
       - name: Save published binary (linux)
         uses: actions/upload-artifact@v4
         with:
-          name: tgz-ubuntu-2404_gcc-${{ inputs.build_mode }}-arm-binary
+          name: tgz-ubuntu-2404_gcc-${{ inputs.build_mode }}-${{ inputs.save_binary }}-binary
           path: ${{ runner.workspace }}/build/HDF5-*-Linux.tar.gz
           if-no-files-found: error # 'warn' or 'ignore' are also available, defaults to `warn`
-        if:  ${{ (inputs.thread_safety != 'TS') && (inputs.concurrent != 'CC') && ( inputs.build_mode != 'Debug') }}
+        if:  ${{ (inputs.thread_safety != 'TS') && (inputs.concurrent != 'CC') && ( inputs.save_binary != 'skip') }}
 
   build_and_test_mac_latest:
     name: "MacOS Clang-${{ inputs.build_mode }}-${{ inputs.thread_safety }}-${{ inputs.concurrent }}"
@@ -260,6 +281,18 @@ jobs:
         with:
           version: "1.13.2"
 
+      - name: Install CMake
+        uses: lukka/get-cmake@latest
+        with:
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
+
+      - name: Check CMake Version
+        shell: bash
+        run: |
+          which cmake
+          cmake --version
+
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - name: Get Sources
         uses: actions/checkout@v4.1.7
@@ -357,7 +390,7 @@ jobs:
       - name: Save published binary (Mac_latest)
         uses: actions/upload-artifact@v4
         with:
-              name: tgz-macos14_clang-${{ inputs.build_mode }}-arm-binary
+              name: tgz-macos14_clang-${{ inputs.build_mode }}-${{ inputs.save_binary }}-binary
               path: ${{ runner.workspace }}/build/HDF5-*-Darwin.tar.gz
               if-no-files-found: error # 'warn' or 'ignore' are also available, defaults to `warn`
-        if: ${{ (inputs.thread_safety != 'TS') && (inputs.concurrent != 'CC') && ( inputs.build_mode != 'Debug') }}
+        if: ${{ (inputs.thread_safety != 'TS') && (inputs.concurrent != 'CC') && ( inputs.save_binary != 'skip') }}

.github/workflows/cmake-ctest.yml

@@ -22,6 +22,10 @@ on:
         type: string
         required: true
         default: snapshots
+      cmake_version:
+        description: "3.26.0 or later, latest"
+        required: true
+        type: string
     secrets:
         APPLE_CERTS_BASE64:
             required: true
@@ -87,11 +91,12 @@ jobs:
         uses: ilammy/msvc-dev-cmd@v1.13.0
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
-      - name: check cmake version
+      - name: Check CMake Version
         shell: bash
         run: |
           which cmake
@@ -233,11 +238,12 @@ jobs:
           version: "1.13.2"
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
-      - name: check cmake version
+      - name: Check CMake Version
         shell: bash
         run: |
           which cmake
@@ -360,11 +366,12 @@ jobs:
           clang -v
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
-      - name: check cmake version
+      - name: Check CMake Version
         shell: bash
         run: |
           which cmake
@@ -581,9 +588,10 @@ jobs:
           sudo apt-get install ninja-build doxygen
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
       - name: Install aws-c-s3 (Cached installation)
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
@@ -682,9 +690,10 @@ jobs:
           version: '2025.0'
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
       - name: Set file base name (Windows_intel)
         id: set-file-base
@@ -827,9 +836,10 @@ jobs:
           version: '2025.0'
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
       - name: Set file base name (Linux_intel)
         id: set-file-base

.github/workflows/cmake-par-script.yml

@@ -22,6 +22,10 @@ on:
         description: "release vs. debug build"
         required: true
         type: string
+      cmake_version:
+        description: "3.26.0 or later, latest"
+        required: true
+        type: string
 
 permissions:
   contents: read
@@ -44,6 +48,12 @@ jobs:
         with:
           version: "1.13.2"
 
+      - name: Install CMake
+        uses: lukka/get-cmake@latest
+        with:
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
+
       - name: Enable Developer Command Prompt
         uses: ilammy/msvc-dev-cmd@v1.13.0
 
@@ -170,6 +180,12 @@ jobs:
         with:
           version: "1.13.2"
 
+      - name: Install CMake
+        uses: lukka/get-cmake@latest
+        with:
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
+
       - name: Setup MPI (${{ matrix.mpi }})
         id: setup-mpi
         uses: mpi4py/setup-mpi@v1

.github/workflows/cmake-par-source.yml

@@ -22,6 +22,10 @@ on:
         description: "release vs. debug build"
         required: true
         type: string
+      cmake_version:
+        description: "3.26.0 or later"
+        required: true
+        type: string
 
 permissions:
   contents: read
@@ -73,9 +77,10 @@ jobs:
           version: "1.13.2"
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
       - name: Set file base name (OpenMPI)
         id: set-file-base
@@ -194,9 +199,10 @@ jobs:
           version: "1.13.2"
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
       - name: Set file base name (MPICH)
         id: set-file-base

.github/workflows/cmake-script.yml

@@ -18,6 +18,10 @@ on:
         type: string
         required: true
         default: snapshots
+      cmake_version:
+        description: "3.26.0 or later, latest"
+        required: true
+        type: string
 
 permissions:
   contents: read
@@ -41,11 +45,12 @@ jobs:
         uses: ilammy/msvc-dev-cmd@v1.13.0
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
-      - name: check cmake version
+      - name: Check CMake Version
         shell: bash
         run: |
           which cmake
@@ -154,9 +159,10 @@ jobs:
           version: "1.13.2"
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
       - name: Set file base name (Linux)
         id: set-file-base
@@ -255,11 +261,12 @@ jobs:
           clang -v
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
-      - name: check cmake version
+      - name: Check CMake Version
         shell: bash
         run: |
           which cmake
@@ -368,9 +375,10 @@ jobs:
           sudo apt-get install ninja-build doxygen
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
       - name: Install aws-c-s3 (Cached installation)
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
@@ -485,9 +493,10 @@ jobs:
           version: '2025.0'
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
       - name: Set file base name (Windows_intel)
         id: set-file-base
@@ -599,9 +608,10 @@ jobs:
           version: '2025.0'
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
       - name: Set file base name (Linux_intel)
         id: set-file-base
@@ -708,11 +718,12 @@ jobs:
           clang -v
 
       - name: Install CMake
-        uses: jwlawson/actions-setup-cmake@v2
+        uses: lukka/get-cmake@latest
         with:
-          cmake-version: '3.31.6'
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
 
-      - name: check cmake version
+      - name: Check CMake Version
         shell: bash
         run: |
           which cmake

.github/workflows/cmake.yml

@@ -43,6 +43,7 @@ jobs:
         name: "CMake Debug Concurrency Workflows"
         uses: ./.github/workflows/main-cmake.yml
         with:
+            cmake_version: "latest"
             concurrent: "CC"
             thread_safety: ""
             build_mode: "Debug"
@@ -51,6 +52,7 @@ jobs:
         name: "CMake Release Concurrency Workflows"
         uses: ./.github/workflows/main-cmake.yml
         with:
+            cmake_version: "latest"
             concurrent: "CC"
             thread_safety: ""
             build_mode: "Release"
@@ -59,6 +61,7 @@ jobs:
         name: "CMake Debug Thread-Safety Workflows"
         uses: ./.github/workflows/main-cmake.yml
         with:
+            cmake_version: "latest"
             concurrent: ""
             thread_safety: "TS"
             build_mode: "Debug"
@@ -67,6 +70,7 @@ jobs:
         name: "CMake Release Thread-Safety Workflows"
         uses: ./.github/workflows/main-cmake.yml
         with:
+            cmake_version: "latest"
             concurrent: ""
             thread_safety: "TS"
             build_mode: "Release"
@@ -75,6 +79,7 @@ jobs:
         name: "CMake Debug Workflows"
         uses: ./.github/workflows/main-cmake.yml
         with:
+            cmake_version: "latest"
             concurrent: ""
             thread_safety: ""
             build_mode: "Debug"
@@ -83,6 +88,26 @@ jobs:
         name: "CMake Release Workflows"
         uses: ./.github/workflows/main-cmake.yml
         with:
+            cmake_version: "latest"
+            concurrent: ""
+            thread_safety: ""
+            build_mode: "Release"
+            save_binary: "std"
+
+    call-release-cmake4:
+        name: "CMake4 Release Workflows"
+        uses: ./.github/workflows/main-cmake.yml
+        with:
+            cmake_version: "latest"
+            concurrent: ""
+            thread_safety: ""
+            build_mode: "Release"
+
+    call-release-cmakeMin:
+        name: "CMake Minimum Release Workflows"
+        uses: ./.github/workflows/main-cmake.yml
+        with:
+            cmake_version: "3.26.0"
             concurrent: ""
             thread_safety: ""
             build_mode: "Release"
@@ -91,18 +116,30 @@ jobs:
         name: "CMake arm64 Workflows"
         uses: ./.github/workflows/arm-main-cmake.yml
         with:
+            cmake_version: "latest"
             concurrent: ""
             thread_safety: ""
             build_mode: "Release"
+            save_binary: "arm64"
 
     call-debug-arm64-cmake:
         name: "CMake arm64 Workflows"
         uses: ./.github/workflows/arm-main-cmake.yml
         with:
+            cmake_version: "latest"
             concurrent: ""
             thread_safety: ""
             build_mode: "Debug"
 
+    call-arm64-cmake4:
+        name: "CMake4 arm64 Workflows"
+        uses: ./.github/workflows/arm-main-cmake.yml
+        with:
+            cmake_version: "latest"
+            concurrent: ""
+            thread_safety: ""
+            build_mode: "Release"
+
     call-release-bintest:
         name: "CMake Test Release Binaries"
         needs: call-release-cmake

.github/workflows/daily-build.yml

@@ -92,6 +92,7 @@ jobs:
     needs: [get-old-names, call-workflow-tarball, call-aws-c-s3-build]
     uses: ./.github/workflows/cmake-script.yml
     with:
+      cmake_version: "latest"
       file_base: ${{ needs.call-workflow-tarball.outputs.file_base }}
       use_environ: snapshots
     if: ${{ ((needs.call-workflow-tarball.outputs.has_changes == 'true') || (needs.get-old-names.outputs.run-ignore == 'ignore')) }}
@@ -100,6 +101,7 @@ jobs:
     needs: [get-old-names, call-workflow-tarball]
     uses: ./.github/workflows/cmake-par-script.yml
     with:
+      cmake_version: "latest"
       file_base: ${{ needs.call-workflow-tarball.outputs.file_base }}
       use_environ: snapshots
       build_mode: "Release"
@@ -109,6 +111,7 @@ jobs:
     needs: [get-old-names, call-workflow-tarball]
     uses: ./.github/workflows/cmake-par-source.yml
     with:
+      cmake_version: "latest"
       file_base: ${{ needs.call-workflow-tarball.outputs.file_base }}
       use_environ: snapshots
       build_mode: "Release"
@@ -134,6 +137,7 @@ jobs:
     needs: [get-old-names, call-workflow-tarball, call-aws-c-s3-build]
     uses: ./.github/workflows/cmake-ctest.yml
     with:
+      cmake_version: 'latest'
       preset_name: ci-StdShar
       file_base: ${{ needs.call-workflow-tarball.outputs.file_base }}
 #      use_tag: snapshot

.github/workflows/dev-cmake.yml

@@ -108,7 +108,7 @@ jobs:
       - name: Enable Developer Command Prompt
         uses: ilammy/msvc-dev-cmd@v1.13.0
 
-      - name: check cmake version
+      - name: Check CMake Version
         shell: bash
         run: |
           which cmake
@@ -181,13 +181,13 @@ jobs:
         with:
           version: "1.13.2"
 
-      - name: check clang version
+      - name: Check Clang Version
         shell: bash
         run: |
           which clang
           clang -v
 
-      - name: check cmake version
+      - name: Check CMake Version
         shell: bash
         run: |
           which cmake
@@ -272,13 +272,13 @@ jobs:
           env: true
           version: '18.1'
 
-      - name: check clang version
+      - name: Check Clang Version
         shell: bash
         run: |
           which clang
           clang -v
 
-      - name: check cmake version
+      - name: Check CMake Version
         shell: bash
         run: |
           which cmake

.github/workflows/main-cmake-spc.yml

@@ -654,53 +654,3 @@ jobs:
         run: cmake --build . --parallel 3 --config Release
         working-directory: ${{ runner.workspace }}/build
 
-  test-cmake-minimum:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Install Linux Dependencies
-      run: |
-         sudo apt-get update
-         sudo apt-get install ninja-build doxygen graphviz
-         sudo apt install libssl3 libssl-dev libcurl4 libcurl4-openssl-dev
-         sudo apt install gcc-12 g++-12 gfortran-12
-         echo "CC=gcc-12" >> $GITHUB_ENV
-         echo "CXX=g++-12" >> $GITHUB_ENV
-         echo "FC=gfortran-12" >> $GITHUB_ENV
-
-    - uses: lukka/get-cmake@latest
-      with:
-        cmakeVersion: 3.18
-
-    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-    - name: Get Sources
-      uses: actions/checkout@v4.1.7
-
-    # CMAKE CONFIGURE
-    - name: CMake Configure
-      run: |
-        mkdir "${{ runner.workspace }}/build"
-        cd "${{ runner.workspace }}/build"
-        cmake -C $GITHUB_WORKSPACE/config/cmake/cacheinit.cmake \
-          -G Ninja \
-          --log-level=VERBOSE \
-          -DCMAKE_BUILD_TYPE=Debug \
-          -DBUILD_SHARED_LIBS=ON \
-          -DHDF5_ENABLE_ALL_WARNINGS=ON \
-          -DHDF5_ENABLE_WARNINGS_AS_ERRORS=ON \
-          -DHDF5_ENABLE_PARALLEL:BOOL=OFF \
-          -DHDF5_BUILD_CPP_LIB:BOOL=ON \
-          -DHDF5_BUILD_FORTRAN=OFF \
-          -DHDF5_BUILD_JAVA=ON \
-          -DHDF5_BUILD_DOC=OFF \
-          -DLIBAEC_USE_LOCALCONTENT=OFF \
-          -DZLIB_USE_LOCALCONTENT=OFF \
-          -DHDF5_ENABLE_MIRROR_VFD:BOOL=ON \
-          -DHDF5_ENABLE_DIRECT_VFD:BOOL=ON \
-          $GITHUB_WORKSPACE
-      shell: bash
-
-    # BUILD
-    - name: CMake Build
-      run: cmake --build . --parallel 3 --config Release
-      working-directory: ${{ runner.workspace }}/build
-

.github/workflows/main-cmake.yml

@@ -4,6 +4,10 @@ name: hdf5 dev CMake CI
 on:
   workflow_call:
     inputs:
+      cmake_version:
+        description: "3.26.0 or later, latest"
+        required: true
+        type: string
       thread_safety:
         description: "TS or empty"
         required: true
@@ -16,6 +20,11 @@ on:
         description: "release vs. debug build"
         required: true
         type: string
+      save_binary:
+        description: "binary-ext-name or missing"
+        required: false
+        default: "skip"
+        type: string
 
 permissions:
   contents: read
@@ -138,6 +147,18 @@ jobs:
         with:
           version: "1.13.2"
 
+      - name: Install CMake
+        uses: lukka/get-cmake@latest
+        with:
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
+
+      - name: Check CMake Version
+        shell: bash
+        run: |
+          which cmake
+          cmake --version
+
       - name: Set environment for MSVC (Windows)
         run: |
           # Set these environment variables so CMake picks the correct compiler
@@ -270,7 +291,7 @@ jobs:
               name: zip-vs2022_cl-${{ inputs.build_mode }}-binary
               path: ${{ runner.workspace }}/build/HDF5-*-win64.zip
               if-no-files-found: error # 'warn' or 'ignore' are also available, defaults to `warn`
-        if:  ${{ (matrix.ostype == 'windows') && (inputs.thread_safety != 'TS') && (inputs.concurrent != 'CC') && ( inputs.build_mode != 'Debug') }}
+        if:  ${{ (matrix.ostype == 'windows') && ( inputs.save_binary != 'skip') }}
 
       - name: Save published binary (linux)
         uses: actions/upload-artifact@v4
@@ -278,7 +299,7 @@ jobs:
               name: tgz-ubuntu-2404_gcc-${{ inputs.build_mode }}-binary
               path: ${{ runner.workspace }}/build/HDF5-*-Linux.tar.gz
               if-no-files-found: error # 'warn' or 'ignore' are also available, defaults to `warn`
-        if:  ${{ (matrix.ostype == 'ubuntu') && (inputs.thread_safety != 'TS') && (inputs.concurrent != 'CC') && ( inputs.build_mode != 'Debug') }}
+        if:  ${{ (matrix.ostype == 'ubuntu') && ( inputs.save_binary != 'skip') }}
 
       - name: Save published binary (Mac_latest)
         uses: actions/upload-artifact@v4
@@ -286,7 +307,7 @@ jobs:
               name: tgz-macos14_clang-${{ inputs.build_mode }}-binary
               path: ${{ runner.workspace }}/build/HDF5-*-Darwin.tar.gz
               if-no-files-found: error # 'warn' or 'ignore' are also available, defaults to `warn`
-        if: ${{ (matrix.ostype == 'macos') && (inputs.thread_safety != 'TS') && (inputs.concurrent != 'CC') && ( inputs.build_mode != 'Debug') }}
+        if: ${{ (matrix.ostype == 'macos') && ( inputs.save_binary != 'skip') }}
 
 
   # A workflow that builds the library and runs all the tests
@@ -399,6 +420,18 @@ jobs:
         with:
           version: "1.13.2"
 
+      - name: Install CMake
+        uses: lukka/get-cmake@latest
+        with:
+            cmakeVersion: ${{ inputs.cmake_version }}
+            ninjaVersion: latest
+
+      - name: Check CMake Version
+        shell: bash
+        run: |
+          which cmake
+          cmake --version
+
       - name: Set environment for MSVC (Windows)
         run: |
           # Set these environment variables so CMake picks the correct compiler

.github/workflows/release.yml

@@ -36,6 +36,7 @@ jobs:
     needs: call-workflow-tarball
     uses: ./.github/workflows/cmake-ctest.yml
     with:
+      cmake_version: "latest"
       preset_name: ci-StdShar
       file_base: ${{ needs.call-workflow-tarball.outputs.file_base }}
       snap_name: hdf5-${{ needs.call-workflow-tarball.outputs.source_base }}

CMakeLists.txt

@@ -27,7 +27,7 @@
 # See comments throughout this file for details on configuration variables and options.
 # -----------------------------------------------------------------------------
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5 C)
 
 if (POLICY CMP0074)

HDF5Examples/C/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_C C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/C/H5D/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_C_H5D C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/C/H5FLT/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_C_H5FLT C)
 
 set (dyn_examples)

HDF5Examples/C/H5G/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_C_H5G C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/C/H5PAR/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (H5PAR_C C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/C/H5T/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_C_H5T C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/C/H5VDS/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_C_H5VDS C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/C/HL/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_C_HL C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/C/Perf/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_C_PERFORM C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/C/TUTR/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_C_TUTR C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/CMakeLists.txt

@@ -6,7 +6,7 @@
 # The option naming convention is H5EX_* for examples options and HDF5_* for HDF5
 # library features.
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (H5EXAMPLES C)
 
 #-----------------------------------------------------------------------------

HDF5Examples/CXX/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDFCXX_EXAMPLES CXX)
 
 add_subdirectory (H5D)

HDF5Examples/CXX/H5D/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_CXX_H5D CXX)
 
 #-----------------------------------------------------------------------------

HDF5Examples/CXX/HL/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_CXX_HL CXX)
 
 #-----------------------------------------------------------------------------

HDF5Examples/CXX/TUTR/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_CXX_TUTR CXX)
 
 #-----------------------------------------------------------------------------

HDF5Examples/FORTRAN/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 PROJECT (HDF5Examples_F90 Fortran)
 
 #-----------------------------------------------------------------------------

HDF5Examples/FORTRAN/H5D/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_FORTRAN_H5D Fortran)
 
 # --------------------------------------------------------------------

HDF5Examples/FORTRAN/H5G/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_FORTRAN_H5G Fortran)
 
 # --------------------------------------------------------------------

HDF5Examples/FORTRAN/H5PAR/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_FORTRAN_H5PAR Fortran)
 
 # --------------------------------------------------------------------

HDF5Examples/FORTRAN/H5T/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_FORTRAN_H5T Fortran)
 
 #-----------------------------------------------------------------------------

HDF5Examples/FORTRAN/HL/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_FORTRAN_HL Fortran)
 
 # --------------------------------------------------------------------

HDF5Examples/FORTRAN/TUTR/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_FORTRAN_TUTR Fortran)
 
 #-----------------------------------------------------------------------------

HDF5Examples/JAVA/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDFJAVA_EXAMPLES Java)
 
 set_directory_properties(PROPERTIES INCLUDE_DIRECTORIES 

HDF5Examples/JAVA/H5D/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_JAVA_H5D Java)
 
 set (CMAKE_VERBOSE_MAKEFILE 1)

HDF5Examples/JAVA/H5G/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_JAVA_GROUPS Java)
 
 set (CMAKE_VERBOSE_MAKEFILE 1)

HDF5Examples/JAVA/H5T/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_JAVA_H5T Java)
 
 set (CMAKE_VERBOSE_MAKEFILE 1)

HDF5Examples/JAVA/TUTR/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_JAVA_TUTR Java)
 
 set (CMAKE_VERBOSE_MAKEFILE 1)

HDF5Examples/PYTHON/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5Examples_PYTHON)
 
 #-----------------------------------------------------------------------------

HDF5Examples/Using_CMake.txt

@@ -28,8 +28,7 @@ I. Preconditions
 
    1. We suggest you obtain the latest CMake from the Kitware
       web site. The HDF5 product requires a minimum CMake version
-      of 3.18. If you are using VS2022, the minimum CMake version is 3.21.
-      CMakePresets.json, requires CMake 3.25 or higher.
+      of 3.26.
 
    2. You have installed the HDF5 library built with CMake, by executing
       the HDF Install Utility (the *.msi file in the binary package for

c++/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_CPP CXX)
 
 add_subdirectory (src)

c++/src/CMakeLists.txt

@@ -3,7 +3,7 @@
 # This file sets up the build, formatting, and installation rules for the HDF5 C++ library (static/shared).
 # It handles C++ source/header definitions, compiler options, linking, export, and pkg-config file generation for the HDF5 C++ API.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_CPP_SRC CXX)
 
 #-----------------------------------------------------------------------------

c++/test/CMakeLists.txt

@@ -4,7 +4,7 @@
 # It handles C++ test source grouping, test executable creation, compiler options, linking, and integration with the HDF5 C++ and core libraries.
 #-----------------------------------------------------------------------------
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_CPP_TEST CXX)
 
 # --------------------------------------------------------------------

config/cmake/LIBAEC/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (LIBAEC C)
 
 #-----------------------------------------------------------------------------

config/cmake/ZLIB/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 set (CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)
 project (ZLIB C)
 

config/cmake/ZLIB/devCMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 
 project(
     ZLIB

config/cmake/scripts/CTestScript.cmake

@@ -9,7 +9,7 @@
 # If you do not have access to either file, you may request a copy from
 # help@hdfgroup.org.
 #
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 ########################################################
 # For any comments please contact help@hdfgroup.org
 #

config/cmake/scripts/HDF5config.cmake

@@ -15,7 +15,7 @@
 ### ctest -S HDF5config.cmake,BUILD_GENERATOR=VS202264 -C Release -VV -O hdf5.log         ###
 #############################################################################################
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 ############################################################################
 # Usage:
 #     ctest -S HDF5config.cmake,OPTION=VALUE -C Release -VV -O test.log

config/examples/CTestScript.cmake

@@ -9,7 +9,7 @@
 # If you do not have access to either file, you may request a copy from
 # help@hdfgroup.org.
 #
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 ########################################################
 # For any comments please contact help@hdfgroup.org
 #

config/examples/HDF5_Examples.cmake.in

@@ -9,7 +9,7 @@
 # If you do not have access to either file, you may request a copy from
 # help@hdfgroup.org.
 #
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 ###############################################################################################################
 # This script will build and run the examples from a folder
 # Execute from a command line:

doxygen/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_DOXYGEN C)
 
 #-----------------------------------------------------------------------------

doxygen/dox/cookbook/Presets.dox

@@ -11,7 +11,7 @@ You want to build HDF5 with CMake, but there are so many options to consider.
 \par Solution
 CMake introduced presets in version 3.19. HDF Group provides a
 <a href="https://\SRCURL/CMakePresets.json"><tt>CMakePresets.json</tt></a>,
-requiring CMake 3.25 or higher,
+requiring CMake 3.26,
 that will build HDF5 with the options for building a typical shared library with
 the common languages for a platform. The features include building the tools, examples,
 plugins, and the shared and static libraries.

fortran/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_F90 C Fortran)
 
 message (VERBOSE "Fortran compiler ID is ${CMAKE_Fortran_COMPILER_ID}")

fortran/src/CMakeLists.txt

@@ -4,7 +4,7 @@
 # It handles Fortran and C source/header definitions, compiler options, module generation, linking, export,
 # and pkg-config file generation for the HDF5 Fortran API.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_F90_SRC C Fortran)
 
 #-----------------------------------------------------------------------------

fortran/test/CMakeLists.txt

@@ -4,7 +4,7 @@
 # It handles Fortran and C test source grouping, test library and executable creation, compiler options, module management,
 # linking, and integration with the HDF5 Fortran and core libraries.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_FORTRAN_TESTS C Fortran)
 
 #-----------------------------------------------------------------------------

fortran/testpar/CMakeLists.txt

@@ -4,7 +4,7 @@
 # It handles Fortran and C test source grouping, test executable creation, compiler options, module management,
 # linking, and integration with the HDF5 Fortran and core libraries for parallel HDF5 testing.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_FORTRAN_TESTPAR C Fortran)
 
 #-----------------------------------------------------------------------------

hl/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL C)
 
 #-----------------------------------------------------------------------------

hl/c++/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_CPP CXX)
 
 #-----------------------------------------------------------------------------

hl/c++/src/CMakeLists.txt

@@ -3,7 +3,7 @@
 # This file sets up the build, formatting, and installation rules for the HDF5 HL C++ library (static/shared).
 # It handles HL C++ source/header definitions, compiler options, linking, export, pkg-config file generation, and integration with the HDF5 HL and core libraries.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_CPP_SRC CXX)
 
 #-----------------------------------------------------------------------------

hl/c++/test/CMakeLists.txt

@@ -3,7 +3,7 @@
 # This file sets up the build, formatting, and test execution rules for the HDF5 HL C++ test suite.
 # It handles HL C++ test source grouping, test executable creation, compiler options, linking, and integration with the HDF5 HL, HL C++, and core libraries.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_CPP_TEST CXX)
 
 add_executable (hl_ptableTest ${HDF5_HL_CPP_TEST_SOURCE_DIR}/ptableTest.cpp)

hl/fortran/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_F90 C Fortran)
 
 #-----------------------------------------------------------------------------

hl/fortran/src/CMakeLists.txt

@@ -3,7 +3,7 @@
 # This file sets up the build, formatting, and installation rules for the HDF5 HL Fortran library (static/shared).
 # It handles HL Fortran and C source/header definitions, compiler options, module generation, linking, export, pkg-config file generation, and integration with the HDF5 HL and core libraries.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_F90_SRC C Fortran)
 
 #-----------------------------------------------------------------------------

hl/fortran/test/CMakeLists.txt

@@ -4,7 +4,7 @@
 # It handles HL Fortran and C test source grouping, test executable creation, compiler options, module management,
 # linking, and integration with the HDF5 HL Fortran, HL, and core libraries.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_FORTRAN_TESTS C Fortran)
 
 #-----------------------------------------------------------------------------

hl/src/CMakeLists.txt

@@ -4,7 +4,7 @@
 # It handles HL C source/header definitions, compiler options, linking, export, pkg-config file generation, and optional documentation for the HDF5 HL API.
 #-----------------------------------------------------------------------------
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_SRC C)
 
 #-----------------------------------------------------------------------------

hl/test/CMakeLists.txt

@@ -3,7 +3,7 @@
 # This file sets up the build, formatting, and test execution rules for the HDF5 HL test suite.
 # It handles HL C test source grouping, test executable creation, compiler options, linking, and integration with the HDF5 HL and core libraries.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_TEST C)
 # --------------------------------------------------------------------
 # Notes: When creating unit test executables they should be prefixed

hl/tools/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_TOOLS C)
 
 add_subdirectory (h5watch)

hl/tools/h5watch/CMakeLists.txt

@@ -4,7 +4,7 @@
 # It handles HL tool source grouping, test program creation, compiler options, linking, export, and integration with the HDF5 HL and core libraries.
 #-----------------------------------------------------------------------------
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_HL_TOOLS_H5WATCH C)
 
 #-----------------------------------------------------------------------------

java/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_JAVA C Java)
 
 set (CMAKE_MODULE_PATH "${HDF_CONFIG_DIR} ${HDF_RESOURCES_DIR}")

java/src/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_JAVA_SRC C)
 
 #-----------------------------------------------------------------------------

java/src/hdf/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_JAVA_HDF C)
 
 add_subdirectory (hdf5lib)

java/src/hdf/hdf5lib/CMakeLists.txt

@@ -4,7 +4,7 @@
 # It handles Java source grouping, JAR creation, JNI dependencies, and formatting for the HDF5 Java bindings.
 #-----------------------------------------------------------------------------
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_JAVA_HDF_HDF5 Java)
 
 set (CMAKE_VERBOSE_MAKEFILE 1)

java/src/jni/CMakeLists.txt

@@ -4,7 +4,7 @@
 # It handles JNI C/C++ source and header definitions, compiler options, linking, export, and integration with the HDF5 shared library for Java bindings.
 #-----------------------------------------------------------------------------
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_JAVA_JNI C)
 
 set (HDF5_JAVA_JNI_CSRCS

java/test/CMakeLists.txt

@@ -5,7 +5,7 @@
 # and integration with the HDF5 Java JNI and core libraries.
 #-----------------------------------------------------------------------------
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_JAVA_TEST Java)
 
 set (CMAKE_VERBOSE_MAKEFILE 1)

release_docs/INSTALL_CMake.txt

@@ -44,9 +44,7 @@ Obtaining HDF5 source code
 
 CMake version
    1. We suggest you obtain the latest CMake from the Kitware web site.
-      The HDF5 2."X"."Y" product requires a minimum CMake version 3.18,
-      where "X"."Y" is the current HDF5 release version. If you are using
-      VS2022, the minimum version is 3.21. CMakePresets requires CMake 3.25.
+      The HDF5 2."X"."Y" product requires a minimum CMake version 3.26.
 
 Note:
    To change the install prefix from the platform defaults initialize
@@ -1117,7 +1115,7 @@ Quick Start Presets
 Solution
 -------------------------------
     CMake introduced presets in version 3.19. HDF Group provides a file in the source,
-    CMakePresets.json, requiring CMake 3.25 or higher, that will build HDF5 with the
+    CMakePresets.json, that will build HDF5 with the
     options for building a typical shared library with the common languages for a
     platform. The features include building the tools, examples, plugins, and the
     shared and static libraries.

release_docs/RELEASE.txt

@@ -47,6 +47,11 @@ New Features
 
     Configuration:
     -------------
+    - CMake minimum version is now 3.26
+
+      The minimum version of CMake is now 3.26, this will remove workarounds to handle
+      versions between 3.18 (previous minimum) and 3.26.
+
     - Removed HDF5_ENABLE_THREADS option
 
       The HDF5_ENABLE_THREADS option has been removed, as it no longer functions

release_docs/USING_CMake_Examples.txt

@@ -29,8 +29,7 @@ I. Preconditions
 
    1. We suggest you obtain the latest CMake for your platform from the Kitware
       web site. The HDF5 z.y.x product requires a minimum CMake version
-      of 3.18. If you are using VS2022, the minimum CMake version is 3.21.
-      CMakePresets.json, requires CMake 3.25 or higher.
+      of 3.26.
 
    2. You have installed the HDF5 library built with CMake, by executing
       the HDF Install Utility (the *.msi file in the binary package for

release_docs/USING_HDF5_CMake.txt

@@ -33,8 +33,7 @@ I. Preconditions
 
    1. We suggest you obtain the latest CMake for your platform from the Kitware
       web site. The HDF5 z.y.x product requires a minimum CMake version
-      of 3.18. If you are using VS2022, the minimum CMake version is 3.21.
-      CMakePresets.json, requires CMake 3.25 or higher.
+      of 3.26.
 
    2. You have installed the HDF5 library built with CMake, by executing
       the HDF Install Utility (the *.msi file in the binary package for
@@ -194,7 +193,7 @@ Given the preconditions in section I, create a CMakeLists.txt file at the
 source root. Include the following text in the file:
 
 ##########################################################
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5MyApp C)
 
 set (LIB_TYPE STATIC) # or SHARED

src/CMakeLists.txt

@@ -5,7 +5,7 @@
 # It organizes source and header files for each module, sets up build targets,
 # manages installation, pkg-config, and documentation generation.
 # -----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_SRC C)
 
 #-----------------------------------------------------------------------------

src/H5FDsubfiling/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_H5FD_SUBFILING C)
 
 # Sanity checking

test/API/CMakeLists.txt

@@ -9,7 +9,7 @@
 # help@hdfgroup.org.
 #
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TEST_API C)
 
 #------------------------------------------------------------------------------

test/API/driver/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project(H5_API_TEST_DRIVER CXX)
 
 if (NOT KWSYS_USE_LOCALCONTENT)

test/CMakeLists.txt

@@ -4,7 +4,7 @@
 # test plugins, and all test executables. It handles source/header definitions, compiler options, linking,
 # export, and test configuration for the HDF5 test suite, including plugin, VFD, VOL, SWMR, and use case tests.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TEST C)
 
 #-----------------------------------------------------------------------------

testpar/API/CMakeLists.txt

@@ -9,7 +9,7 @@
 # help@hdfgroup.org.
 #
 
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TEST_PAR_API C)
 
 #------------------------------------------------------------------------------

testpar/CMakeLists.txt

@@ -3,7 +3,7 @@
 # This file sets up the build, formatting, and installation rules for the HDF5 parallel test library (static/shared) and its test executables.
 # It handles source/header definitions, compiler options, linking, export, and test configuration for parallel HDF5 testing.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TEST_PAR C)
 
 #################################################################################

tools/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS C)
 
 add_subdirectory (lib)

tools/lib/CMakeLists.txt

@@ -3,7 +3,7 @@
 # This file sets up the build, formatting, and installation rules for the HDF5 tools library (static and shared).
 # It handles source/header definitions, compiler options, linking, and export for the HDF5 tools suite.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_LIB C)
 
 #-----------------------------------------------------------------------------

tools/libtest/CMakeLists.txt

@@ -3,7 +3,7 @@
 # This file sets up the build, formatting, and test configuration for the h5tools_test_utils executable.
 # It handles compiler options, linking, and export for the HDF5 tools test suite.
 #-----------------------------------------------------------------------------
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_LIBTEST C)
 
 #-----------------------------------------------------------------------------

tools/src/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC C)
 
 #-- Add the h5diff and test executables

tools/src/h5copy/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5COPY C)
 
 #-----------------------------------------------------------------------------

tools/src/h5diff/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5DIFF C)
 
 #-----------------------------------------------------------------------------

tools/src/h5dump/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5DUMP C)
 
 #-----------------------------------------------------------------------------

tools/src/h5format_convert/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5FC C)
 
 #-----------------------------------------------------------------------------

tools/src/h5import/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5IMPORT C)
 
 #-----------------------------------------------------------------------------

tools/src/h5jam/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5JAM C)
 
 #-----------------------------------------------------------------------------

tools/src/h5ls/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5LS C)
 
 # --------------------------------------------------------------------

tools/src/h5perf/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5PERF C)
 
 # --------------------------------------------------------------------

tools/src/h5repack/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5REPACK C)
 
 # --------------------------------------------------------------------

tools/src/h5stat/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_H5STAT C)
 
 # --------------------------------------------------------------------

tools/src/misc/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.18)
+cmake_minimum_required (VERSION 3.26)
 project (HDF5_TOOLS_SRC_MISC C)
 
 # --------------------------------------------------------------------