Added support for running the GitHub actions workflow using CCache.

.github/workflows/ci.yml

@@ -19,6 +19,10 @@ jobs:
     name: ${{ matrix.platform.name }} ${{ matrix.config.name }} ${{ matrix.type.name }}
     runs-on: ${{ matrix.platform.os }}
 
+    env:
+      CMAKE_C_COMPILER_LAUNCHER: ccache # Use ccache to cache C compiler output
+      CMAKE_CXX_COMPILER_LAUNCHER: ccache # Use ccache to cache C++ compiler output
+
     strategy:
       fail-fast: false
       matrix:
@@ -72,9 +76,12 @@ jobs:
         cmakeVersion: ${{ runner.os == 'Windows' && '3.24' || '3.22' }} # Set to minimum required version (3.24 on Windows and 3.22 elsewhere) as specified in CMakeLists.txt to test compatibility
         ninjaVersion: latest
 
-    - name: Install Linux Dependencies
+    - name: Install Linux Dependencies and Tools
       if: runner.os == 'Linux'
-      run: sudo apt-get update && sudo apt-get install xorg-dev libxrandr-dev libxcursor-dev libudev-dev libopenal-dev libflac-dev libvorbis-dev libgl1-mesa-dev libegl1-mesa-dev libdrm-dev libgbm-dev xvfb fluxbox
+      run: |
+        CLANG_VERSION=$(clang++ --version | sed -n 's/.*version \([0-9]\+\)\..*/\1/p')
+        echo "CLANG_VERSION=$CLANG_VERSION" >> $GITHUB_ENV
+        sudo apt-get update && sudo apt-get install xorg-dev libxrandr-dev libxcursor-dev libudev-dev libopenal-dev libflac-dev libvorbis-dev libgl1-mesa-dev libegl1-mesa-dev libdrm-dev libgbm-dev xvfb fluxbox ccache gcovr ${{ matrix.platform.name == 'Linux Clang' && 'llvm-$CLANG_VERSION' || '' }}
 
     - name: Install Android Components
       if: matrix.platform.name == 'Android'
@@ -82,19 +89,20 @@ jobs:
         wget -nv https://dl.google.com/android/repository/android-ndk-r23b-linux.zip -P $GITHUB_WORKSPACE
         unzip -qq -d $GITHUB_WORKSPACE android-ndk-r23b-linux.zip
 
-    - name: Install Linux Tools
-      if: matrix.type.name == 'Debug' && runner.os == 'Linux'
-      run: |
-        CLANG_VERSION=$(clang++ --version | sed -n 's/.*version \([0-9]\+\)\..*/\1/p')
-        echo "CLANG_VERSION=$CLANG_VERSION" >> $GITHUB_ENV
-        sudo apt-get install gcovr ${{ matrix.platform.name == 'Linux Clang' && 'llvm-$CLANG_VERSION' || '' }}
-
     - name: Install macOS Tools
       if: runner.os == 'macOS'
       run: |
         # Do not run updates until GitHub has fixed all the issues: https://github.com/orgs/Homebrew/discussions/4612
         # brew update
-        brew install gcovr || true
+        brew install gcovr ccache || true
+
+    # In addition to installing a known working version of CCache, this action also takes care of saving and restoring the cache for us
+    # Additionally it outputs information at the end of each job that helps us to verify if the cache is working properly
+    - name: Setup CCache
+      uses: hendrikmuhs/ccache-action@v1.2.10
+      with:
+        verbose: 2
+        key: ${{ matrix.platform.name }}-${{ matrix.config.name }}-${{ matrix.type.name }}
 
     - name: Cache OpenCppCoverage
       if: matrix.type.name == 'Debug' && runner.os == 'Windows'
@@ -126,11 +134,14 @@ jobs:
         curl -Lo mingw64.zip https://github.com/brechtsanders/winlibs_mingw/releases/download/12.2.0-16.0.0-10.0.0-msvcrt-r5/winlibs-x86_64-posix-seh-gcc-12.2.0-llvm-16.0.0-mingw-w64msvcrt-10.0.0-r5.zip
         unzip -qq -d "C:\Program Files" mingw64.zip
 
-    - name: Add OpenCppCoverage and MinGW to PATH
+    - name: Add OpenCppCoverage and MinGW to PATH and remove MinGW-supplied CCache
       if: runner.os == 'Windows'
       run: |
         echo "C:\Program Files\OpenCppCoverage" >> $GITHUB_PATH
         echo "C:\Program Files\mingw64\bin" >> $GITHUB_PATH
+        rm -f "C:\Program Files\mingw64\bin\ccache.exe"
+        echo "Using $(which ccache)"
+        ccache --version
 
     - name: Configure CMake
       run: cmake --preset dev -DCMAKE_VERBOSE_MAKEFILE=ON ${{matrix.platform.flags}} ${{matrix.config.flags}} ${{matrix.type.flags}}

CMakeLists.txt

@@ -27,13 +27,6 @@ project(SFML VERSION 3.0.0)
 
 set(VERSION_IS_RELEASE OFF)
 
-# use ccache if available
-find_program(CCACHE_PROGRAM ccache)
-if(CCACHE_PROGRAM)
-    message(STATUS "Found ccache in ${CCACHE_PROGRAM}")
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
-endif()
-
 # include the configuration file
 include(cmake/Config.cmake)