[cmake] Require CMake 3.15 or newer

.bazelignore

@@ -1 +1 @@
-test/googletest-1.13.0
+test/googletest-1.16.0

.codedocs

@@ -8,7 +8,7 @@ EXAMPLE_PATH =
 
 # One or more directories and files to exclude from documentation generation.
 # Use relative paths with respect to the repository root directory.
-EXCLUDE = test/googletest-1.13.0/
+EXCLUDE = test/googletest-1.16.0/
 
 # One or more wildcard patterns to exclude files and directories from document
 # generation.

.github/actions/quick_cmake/action.yml

@@ -0,0 +1,25 @@
+name: Quick CMake config
+description: "Runs CMake 3.14+ (if already setup)"
+inputs:
+  args:
+    description: "Other arguments"
+    required: false
+    default: ""
+  cmake-version:
+    description: "The CMake version to run"
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: CMake ${{ inputs.cmake-version }}
+      uses: jwlawson/actions-setup-cmake@v2.2
+      with:
+        cmake-version: "${{ inputs.cmake-version }}"
+    - run: |
+        mkdir -p build-tmp
+        touch build-tmp/tmp
+        rm -r build-tmp/*
+        (cd build-tmp && cmake .. ${{ inputs.args }})
+        rm -r build-tmp
+      shell: bash

.github/workflows/build.yml

@@ -104,6 +104,24 @@ jobs:
               --config ${{ env.CMAKE_BUILD_TYPE }} \
               --verbose
 
+  cmake-config-oldest-cmake:
+    name: CMake version range config check (Ubuntu 24.04)
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Check CMake 3.15
+        uses: ./.github/actions/quick_cmake
+        with:
+          cmake-version: "3.15"
+        if: success() || failure()
+
+      - name: Check CMake 4.3
+        uses: ./.github/actions/quick_cmake
+        with:
+          cmake-version: "4.3"
+        if: success() || failure()
+
   bazel-build:
       strategy:
         matrix:

CMakeLists.txt

@@ -1,12 +1,4 @@
-# 3.5 is actually available almost everywhere.
-# 3.30 as the upper policy limit avoids CMake deprecation warnings.
-cmake_minimum_required(VERSION 3.5...3.30)
-
-# enable MSVC_RUNTIME_LIBRARY target property
-# see https://cmake.org/cmake/help/latest/policy/CMP0091.html
-if(POLICY CMP0091)
-  cmake_policy(SET CMP0091 NEW)
-endif()
+cmake_minimum_required(VERSION 3.15..4.3)
 
 project(YAML_CPP VERSION 0.9.0 LANGUAGES CXX)
 
@@ -62,15 +54,8 @@ if (NOT DEFINED CMAKE_MSVC_RUNTIME_LIBRARY)
     MultiThreaded$<$<CONFIG:Debug>:Debug>$<${msvc-shared_rt}:DLL>)
 endif()
 
-set(contrib-pattern "src/contrib/*.cpp")
-set(src-pattern "src/*.cpp")
-if (CMAKE_VERSION VERSION_GREATER 3.12)
-  list(INSERT contrib-pattern 0 CONFIGURE_DEPENDS)
-  list(INSERT src-pattern 0 CONFIGURE_DEPENDS)
-endif()
-
-file(GLOB yaml-cpp-contrib-sources ${contrib-pattern})
-file(GLOB yaml-cpp-sources ${src-pattern})
+file(GLOB yaml-cpp-contrib-sources CONFIGURE_DEPENDS "src/contrib/*.cpp")
+file(GLOB yaml-cpp-sources CONFIGURE_DEPENDS "src/*.cpp")
 
 set(msvc-rt $<TARGET_PROPERTY:MSVC_RUNTIME_LIBRARY>)
 
@@ -80,8 +65,6 @@ set(msvc-rt-mt-static $<STREQUAL:${msvc-rt},MultiThreaded>)
 set(msvc-rt-mtd-dll $<STREQUAL:${msvc-rt},MultiThreadedDebugDLL>)
 set(msvc-rt-mt-dll $<STREQUAL:${msvc-rt},MultiThreadedDLL>)
 
-set(backport-msvc-runtime $<VERSION_LESS:${CMAKE_VERSION},3.15>)
-
 add_library(yaml-cpp ${yaml-cpp-type} "")
 add_library(yaml-cpp::yaml-cpp ALIAS yaml-cpp)
 
@@ -118,11 +101,6 @@ endif()
 
 target_compile_options(yaml-cpp
   PRIVATE
-    $<$<AND:${backport-msvc-runtime},${msvc-rt-mtd-static}>:-MTd>
-    $<$<AND:${backport-msvc-runtime},${msvc-rt-mt-static}>:-MT>
-    $<$<AND:${backport-msvc-runtime},${msvc-rt-mtd-dll}>:-MDd>
-    $<$<AND:${backport-msvc-runtime},${msvc-rt-mt-dll}>:-MD>
-
     # /wd4127 = disable warning C4127 "conditional expression is constant"
     # http://msdn.microsoft.com/en-us/library/6t66728h.aspx
     # /wd4355 = disable warning C4355 "'this' : used in base member initializer list

test/CMakeLists.txt

@@ -11,20 +11,13 @@ if(YAML_USE_SYSTEM_GTEST)
   endif()
 else()
     add_subdirectory(
-      "${CMAKE_CURRENT_SOURCE_DIR}/googletest-1.13.0"
+      "${CMAKE_CURRENT_SOURCE_DIR}/googletest-1.16.0"
       "${CMAKE_CURRENT_BINARY_DIR}/prefix")
-    include_directories(SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}/googletest-1.13.0/googletest/include")
+    include_directories(SYSTEM "${CMAKE_CURRENT_SOURCE_DIR}/googletest-1.16.0/googletest/include")
 endif()
 
-set(test-new-api-pattern "new-api/*.cpp")
-set(test-source-pattern "*.cpp" "integration/*.cpp" "node/*.cpp")
-if (CMAKE_VERSION VERSION_GREATER 3.11)
-  list(INSERT test-new-api-pattern 0 CONFIGURE_DEPENDS)
-  list(INSERT test-source-pattern 0 CONFIGURE_DEPENDS)
-endif()
-
-file(GLOB test-new-api-sources ${test-new-api-pattern})
-file(GLOB test-sources ${test-source-pattern})
+file(GLOB test-new-api-sources CONFIGURE_DEPENDS "new-api/*.cpp")
+file(GLOB test-sources CONFIGURE_DEPENDS "*.cpp" "integration/*.cpp" "node/*.cpp")
 
 add_executable(yaml-cpp-tests "")
 target_sources(yaml-cpp-tests