[Fix] (ci): cache native compilation

.github/workflows/apk.yml

@@ -11,6 +11,13 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    env:
+      CCACHE_BASEDIR: ${{ github.workspace }}
+      CCACHE_COMPRESS: "true"
+      CCACHE_DIR: ${{ github.workspace }}/.ccache
+      CCACHE_MAXSIZE: 4G
+      CCACHE_NOHASHDIR: "true"
+      MOBILEGL_CMAKE_COMPILER_LAUNCHER: ccache
 
     steps:
       - name: Checkout repo
@@ -34,6 +41,21 @@ jobs:
         with:
           gradle-version: 8.10.2
 
+      - name: Restore ccache
+        uses: actions/cache@v4
+        with:
+          path: .ccache
+          key: ${{ runner.os }}-apk-${{ github.job }}-ccache-${{ github.ref_name }}-${{ github.run_id }}
+          restore-keys: |
+            ${{ runner.os }}-apk-${{ github.job }}-ccache-${{ github.ref_name }}-
+            ${{ runner.os }}-apk-${{ github.job }}-ccache-
+
+      - name: Install ccache
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y ccache
+          ccache --version
+
       - name: Setup Android SDK
         uses: android-actions/setup-android@v3
 
@@ -60,6 +82,10 @@ jobs:
           SIGNING_KEY_ALIAS: ${{ secrets.SIGNING_KEY_ALIAS }}
           SIGNING_KEY_PASSWORD: ${{ secrets.SIGNING_KEY_PASSWORD }}
 
+      - name: Show ccache stats
+        if: always()
+        run: ccache --show-stats
+
       - name: Verify signed APKs
         run: |
           APKSIGNER="$(find "$ANDROID_HOME/build-tools" -name apksigner -type f | sort -V | tail -n 1)"

.github/workflows/test.yml

@@ -13,6 +13,11 @@ jobs:
     runs-on: ubuntu-latest
     env:
       BUILD_DIR: build-linux
+      CCACHE_BASEDIR: ${{ github.workspace }}
+      CCACHE_COMPRESS: "true"
+      CCACHE_DIR: ${{ github.workspace }}/.ccache
+      CCACHE_MAXSIZE: 4G
+      CCACHE_NOHASHDIR: "true"
 
     steps:
       - name: Set Swap Space
@@ -28,6 +33,15 @@ jobs:
       - name: Get CMake
         uses: lukka/get-cmake@latest
 
+      - name: Restore ccache
+        uses: actions/cache@v4
+        with:
+          path: .ccache
+          key: ${{ runner.os }}-test-${{ github.job }}-ccache-${{ github.ref_name }}-${{ github.run_id }}
+          restore-keys: |
+            ${{ runner.os }}-test-${{ github.job }}-ccache-${{ github.ref_name }}-
+            ${{ runner.os }}-test-${{ github.job }}-ccache-
+
       - name: Prepare Vulkan SDK
         uses: humbletim/setup-vulkan-sdk@v1.2.1
         with:
@@ -42,10 +56,11 @@ jobs:
       - name: Install build dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y clang-20 clang++-20 lld-20 libc++-20-dev libc++abi-20-dev libvulkan-dev libegl1-mesa-dev libgles2-mesa-dev libgl1-mesa-dri mesa-vulkan-drivers ninja-build
+          sudo apt-get install -y ccache clang-20 clang++-20 lld-20 libc++-20-dev libc++abi-20-dev libvulkan-dev libegl1-mesa-dev libgles2-mesa-dev libgl1-mesa-dri mesa-vulkan-drivers ninja-build
 
       - name: Show installed toolchain
         run: |
+          ccache --version
           clang-20 --version
           clang++-20 --version
           ld.lld-20 --version || ld.lld --version || true
@@ -62,6 +77,8 @@ jobs:
           cmake -S . -B "${BUILD_DIR}" -G Ninja \
             -DCMAKE_C_COMPILER=clang-20 \
             -DCMAKE_CXX_COMPILER=clang++-20 \
+            -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
             -DCMAKE_BUILD_TYPE="${BUILD_TYPE}" \
             -DMOBILEGL_LOG_ACTIVE_LEVEL=MOBILEGL_LOG_LEVEL_INFO \
             -DMOBILEGL_BUILD_TEST=ON \
@@ -74,6 +91,10 @@ jobs:
       - name: Build
         run: cmake --build "${BUILD_DIR}" --parallel "$(nproc)"
 
+      - name: Show ccache stats
+        if: always()
+        run: ccache --show-stats
+
       - name: Package Linux runtime
         run: |
           mkdir -p ci-artifacts
@@ -193,6 +214,11 @@ jobs:
     needs: build-linux
     env:
       BUILD_DIR: build-retrace
+      CCACHE_BASEDIR: ${{ github.workspace }}
+      CCACHE_COMPRESS: "true"
+      CCACHE_DIR: ${{ github.workspace }}/.ccache
+      CCACHE_MAXSIZE: 4G
+      CCACHE_NOHASHDIR: "true"
       MOBILEGL_LIBRARY: ${{ github.workspace }}/build-linux/libMobileGL.so
 
     steps:
@@ -210,6 +236,15 @@ jobs:
       - name: Get CMake
         uses: lukka/get-cmake@latest
 
+      - name: Restore ccache
+        uses: actions/cache@v4
+        with:
+          path: .ccache
+          key: ${{ runner.os }}-test-${{ github.job }}-ccache-${{ github.ref_name }}-${{ github.run_id }}
+          restore-keys: |
+            ${{ runner.os }}-test-${{ github.job }}-ccache-${{ github.ref_name }}-
+            ${{ runner.os }}-test-${{ github.job }}-ccache-
+
       - name: Prepare Vulkan SDK
         uses: humbletim/setup-vulkan-sdk@v1.2.1
         with:
@@ -224,10 +259,11 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y clang-20 clang++-20 lld-20 libc++-20-dev libc++abi-20-dev libvulkan-dev libegl1-mesa-dev libgles2-mesa-dev libgl1-mesa-dri mesa-vulkan-drivers ninja-build
+          sudo apt-get install -y ccache clang-20 clang++-20 lld-20 libc++-20-dev libc++abi-20-dev libvulkan-dev libegl1-mesa-dev libgles2-mesa-dev libgl1-mesa-dri mesa-vulkan-drivers ninja-build
 
       - name: Show installed toolchain
         run: |
+          ccache --version
           clang-20 --version
           clang++-20 --version
           ld.lld-20 --version || ld.lld --version || true
@@ -255,6 +291,8 @@ jobs:
           cmake -S . -B "${BUILD_DIR}" -G Ninja \
             -DCMAKE_C_COMPILER=clang-20 \
             -DCMAKE_CXX_COMPILER=clang++-20 \
+            -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
             -DCMAKE_BUILD_TYPE="${BUILD_TYPE}" \
             -DMOBILEGL_LOG_ACTIVE_LEVEL=MOBILEGL_LOG_LEVEL_INFO \
             -DMOBILEGL_BUILD_TEST=OFF \
@@ -266,6 +304,10 @@ jobs:
       - name: Build trace replay
         run: cmake --build "${BUILD_DIR}" --target mobilegl_trace_replay --parallel "$(nproc)"
 
+      - name: Show ccache stats
+        if: always()
+        run: ccache --show-stats
+
       - name: Normalize CTest command paths
         run: |
           python - <<'PY'

android-plugin/app/build.gradle

@@ -18,6 +18,9 @@ def releaseSigningReady = signingStoreFile.exists()
         && signingKeyAlias
         && signingKeyPassword
 def debuggableRelease = (findProperty('mobilegl.debuggableRelease') ?: 'false').toString().toBoolean()
+def mobileGlCmakeCompilerLauncher = {
+    (findProperty('mobilegl.cmakeCompilerLauncher') ?: System.getenv('MOBILEGL_CMAKE_COMPILER_LAUNCHER') ?: '').toString().trim()
+}
 def mobileGlAbiFilters = {
     def abiList = (findProperty('mobilegl.abis') ?: System.getenv('MOBILEGL_ABIS') ?: 'arm64-v8a') as String
     if (abiList.equalsIgnoreCase('all')) {
@@ -46,6 +49,15 @@ android {
                 abiFilters(*abiFiltersOverride)
             }
         }
+        externalNativeBuild {
+            cmake {
+                def compilerLauncher = mobileGlCmakeCompilerLauncher()
+                if (!compilerLauncher.isEmpty()) {
+                    arguments "-DCMAKE_C_COMPILER_LAUNCHER=${compilerLauncher}",
+                            "-DCMAKE_CXX_COMPILER_LAUNCHER=${compilerLauncher}"
+                }
+            }
+        }
     }
 
     flavorDimensions 'backend', 'profile'

android-plugin/build.gradle

@@ -18,6 +18,10 @@ def mobileGlLogActiveLevel = {
     (rootProject.findProperty('mobilegl.logLevel') ?: System.getenv('MOBILEGL_LOG_ACTIVE_LEVEL') ?: 'MOBILEGL_LOG_LEVEL_INFO') as String
 }
 
+def mobileGlCmakeCompilerLauncher = {
+    (rootProject.findProperty('mobilegl.cmakeCompilerLauncher') ?: System.getenv('MOBILEGL_CMAKE_COMPILER_LAUNCHER') ?: '').toString().trim()
+}
+
 subprojects { subproject ->
     subproject.plugins.withId('com.android.library') {
         subproject.android {
@@ -30,6 +34,11 @@ subprojects { subproject ->
                 }
                 externalNativeBuild {
                     cmake {
+                        def compilerLauncher = mobileGlCmakeCompilerLauncher()
+                        if (!compilerLauncher.isEmpty()) {
+                            arguments "-DCMAKE_C_COMPILER_LAUNCHER=${compilerLauncher}",
+                                    "-DCMAKE_CXX_COMPILER_LAUNCHER=${compilerLauncher}"
+                        }
                         cppFlags "-DMOBILEGL_LOG_ACTIVE_LEVEL=${mobileGlLogActiveLevel()}"
                     }
                 }