Add GitHub Actions pipeline (#79)

.github/workflows/android-clang.yaml

@@ -0,0 +1,32 @@
+name: Build for Android with Clang using the NDK
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up JDK 21 environment
+      run: |
+        echo "export JAVA_HOME=$JAVA_HOME_21_X64" >> $GITHUB_ENV
+        echo "export PATH=$JAVA_HOME/bin:$PATH" >> $GITHUB_ENV
+
+    - name: Use the built-in Android NDK
+      run: |
+        echo "export ANDROID_NDK_HOME=/usr/local/lib/android/sdk/ndk/26.3.11579264" >> $GITHUB_ENV
+        echo "export PATH=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux/bin:$PATH" >> $GITHUB_ENV
+
+    - name: Build with Clang and Android NDK
+      run: |
+        mkdir -p build
+        cd build
+        cmake -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_HOME/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=android-23 ..
+        make

.github/workflows/linux-clang.yaml

@@ -0,0 +1,22 @@
+name: Build for Linux with Clang
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Build with Clang
+      run: |
+        mkdir -p build
+        cd build
+        cmake -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ..
+        make

.github/workflows/linux-gcc.yaml

@@ -0,0 +1,22 @@
+name: Build for Linux with GCC
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+
+    steps:
+    - name: Git checkout
+      uses: actions/checkout@v4
+
+    - name: Build with GCC
+      run: |
+        mkdir -p build
+        cd build
+        cmake -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ ..
+        make