Enable linux-arm64 in CI

Signed-off-by: Mary Guillemard <mary@mary.zone>

.github/workflows/build.yml

@@ -18,14 +18,18 @@ jobs:
       fail-fast: false
       matrix:
         platform:
-        - { name: win-x64,   os: windows-latest, arch: x64   }
-        - { name: win-x86,   os: windows-latest, arch: Win32 }
-        - { name: win-arm64, os: windows-latest, arch: ARM64 }
-        - { name: linux-x64, os: ubuntu-20.04,   arch: amd64 }
-        - { name: linux-x86, os: ubuntu-20.04,   arch: i386  }
-        - { name: osx-x64,   os: macos-latest,   arch: x86_64}
-        - { name: osx-arm64, os: macos-latest,   arch: arm64 }
+        - { name: win-x64,     os: windows-latest, arch: x64    }
+        # - { name: win-x86,     os: windows-latest, arch: Win32  }
+        - { name: win-arm64,   os: windows-latest, arch: ARM64  }
+        - { name: linux-x64,   os: ubuntu-20.04,   arch: amd64  }
+        # - { name: linux-x86,   os: ubuntu-20.04,   arch: i386   }
+        - { name: linux-arm64, os: ubuntu-20.04,   arch: arm64  }
+        - { name: osx-x64,     os: macos-latest,   arch: x86_64 }
+        - { name: osx-arm64,   os: macos-latest,   arch: arm64  }
     steps:
+    - name: Setup qemu static
+      uses: docker/setup-qemu-action@v3
+      if: runner.os == 'Linux'
     - uses: actions/checkout@v4
       with:
         repository: Ryujinx/SDL
@@ -34,7 +38,7 @@ jobs:
       with:
         path: 'SDL2-CS'
     - name: Build and prepare release
-      run: SDL2-CS/ci/build.sh $PWD SDL2-CS/native/${{ matrix.platform.name }} ${{ matrix.platform.arch }}
+      run: SDL2-CS/ci/run.sh $PWD $PWD/SDL2-CS/native/${{ matrix.platform.name }} ${{ matrix.platform.arch }}
       shell: bash
     - name: Upload artifacts
       uses: actions/upload-artifact@v3

ci/compile.sh

@@ -97,6 +97,8 @@ cmake -B build -DCMAKE_BUILD_TYPE=Release -DSDL_SHARED_ENABLED_BY_DEFAULT=ON -DS
 cmake --build build/ --config Release
 $SUDO cmake --install build/ --prefix install_output --config Release
 
+mkdir -p $output_path
+
 if [[ $system_name == "linux" ]]; then
     cp install_output/lib/libSDL2-2.0.so.0 $output_path/libSDL2.so
 elif [[ $system_name == "macos" ]]; then

ci/run.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+set -e
+
+if [ "$#" -le 2 ]; then
+    echo "usage: <sdl_dir> <output_path> <build_arch>"
+    exit 1
+fi
+
+uname_system="$(uname -s)"
+
+case "${uname_system}" in
+    Linux*)     system_name=linux;;
+    Darwin*)    system_name=macos;;
+    CYGWIN*)    system_name=win;;
+    MINGW*)     system_name=win;;
+    *)          system_name="Unknown OS: ${uname_system}"
+esac
+
+sdl_dir=$1
+output_path=$2
+build_arch=$3
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+mkdir -p $output_path
+
+if [ $system_name == "linux" ] && [ $build_arch == "arm64" ]; then
+    if command -v podman &> /dev/null; then
+        DOCKER=podman
+    elif command -v docker &> /dev/null; then
+        DOCKER=docker
+    else
+        echo "ERROR - Missing docker/podman env, cannot crossbuild"
+        exit 1
+    fi
+
+    $DOCKER run --rm -v $SCRIPT_DIR:/scripts -v $output_path:/output -v $sdl_dir:/source -t arm64v8/ubuntu:focal bash /scripts/compile.sh /source /output $build_arch
+else
+    $SCRIPT_DIR/compile.sh "$sdl_dir" "$output_path" "$build_arch"
+fi