cmake: add CPack support for creating binary archives

.github/workflows/android.yml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         platform:
           - { name: Android.mk  }
-          - { name: CMake, cmake: 1, android_abi: "arm64-v8a", android_platform: 23, arch: "aarch64" }
+          - { name: CMake, cmake: 1, android_abi: "arm64-v8a", android_platform: 23, arch: "aarch64", artifact: "SDL-android-arm64" }
 
     steps:
       - uses: actions/checkout@v3
@@ -57,6 +57,10 @@ jobs:
           cmake --install build --config Release
           echo "SDL3_DIR=$(pwd)/prefix" >> $GITHUB_ENV
           ( cd prefix; find ) | LC_ALL=C sort -u
+      - name: Package (CPack)
+        if: ${{ matrix.platform.name == 'CMake' }}
+        run: |
+          cmake --build build/ --config Release --target package
       - name: Verify CMake configuration files
         if: ${{ matrix.platform.name == 'CMake' }}
         run: |
@@ -73,3 +77,9 @@ jobs:
           export CC="${{ steps.setup_ndk.outputs.ndk-path }}/toolchains/llvm/prebuilt/linux-x86_64/bin/clang --target=${{ matrix.platform.arch }}-none-linux-androideabi${{ matrix.platform.android_platform }}"
           export PKG_CONFIG_PATH=${{ env.SDL3_DIR }}/lib/pkgconfig
           cmake/test/test_pkgconfig.sh
+      - uses: actions/upload-artifact@v3
+        if: ${{ matrix.platform.name == 'CMake' }}
+        with:
+          if-no-files-found: error
+          name: ${{ matrix.platform.artifact }}
+          path: build/dist/SDL3*