Build Android libretro core on CI (#797)

* Attempt to build Android libretro core on CI

* Hopefully fix Android libretro compilation

* Try fix libretro android again

* Fix SO name

* Rename .so again

* Nit

* Update Android Libretro build

* Remove ccache for Android libretro

.github/workflows/Hydra_Build.yml

@@ -213,3 +213,32 @@ jobs:
         path: |
           ${{github.workspace}}/build/panda3ds_libretro.so
           ${{github.workspace}}/docs/libretro/panda3ds_libretro.info
+  
+  ARM-Libretro-Android:
+    runs-on: ubuntu-24.04
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Fetch submodules
+      run: git submodule update --init --recursive
+
+    - name: Configure CMake
+      run: cmake -B ${{github.workspace}}/build -DBUILD_LIBRETRO_CORE=1 -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DCMAKE_TOOLCHAIN_FILE=${ANDROID_NDK_ROOT}/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DENABLE_VULKAN=0 -DENABLE_USER_BUILD=ON -DCMAKE_CXX_FLAGS="-march=armv8-a+crypto"
+
+    - name: Build
+      run: |
+        # Apply patch for GLES compatibility
+        git apply ./.github/gles.patch
+        # Build the project with CMake
+        cmake --build ${{github.workspace}}/build --config ${{ env.BUILD_TYPE }}
+
+        # Strip the generated library
+        ${ANDROID_NDK_ROOT}/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip --strip-unneeded ./build/panda3ds_libretro.so
+        
+    - name: Upload artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: Android arm64 Libretro core
+        path: |
+          ${{github.workspace}}/build/panda3ds_libretro.so
+          ${{github.workspace}}/docs/libretro/panda3ds_libretro.info

src/jni_driver.cpp

@@ -10,11 +10,11 @@
 #include "android_utils.hpp"
 #include "sdl_sensors.hpp"
 
-std::unique_ptr<Emulator> emulator = nullptr;
+static std::unique_ptr<Emulator> emulator = nullptr;
-HIDService* hidService = nullptr;
+static HIDService* hidService = nullptr;
-RendererGL* renderer = nullptr;
+static RendererGL* renderer = nullptr;
-bool romLoaded = false;
+static bool romLoaded = false;
-JavaVM* jvm = nullptr;
+static JavaVM* jvm = nullptr;
 
 jclass alberClass;
 jmethodID alberClassOpenDocument;

src/libretro_core.cpp

@@ -19,8 +19,8 @@ static std::filesystem::path savePath;
 static bool screenTouched = false;
 static bool usingGLES = false;
 
-std::unique_ptr<Emulator> emulator;
+static std::unique_ptr<Emulator> emulator;
-RendererGL* renderer;
+static RendererGL* renderer;
 
 std::filesystem::path Emulator::getConfigPath() { return std::filesystem::path(savePath / "config.toml"); }
 std::filesystem::path Emulator::getAppDataRoot() { return std::filesystem::path(savePath / "Emulator Files"); }