Add aarch64 CI

.github/workflows/build-ubuntu-aarch64.yml

@@ -0,0 +1,47 @@
+name: CMake Build (Ubuntu x86-64)
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+env:
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Install dependencies
+      shell: bash
+      working-directory: ${{runner.workspace}}
+      run: |
+        sudo dpkg --add-architecture arm64 \
+        sudo sh -c "sed \"s|^deb \([a-z\.:/]*\) \([a-z\-]*\) \(.*\)$|deb [arch=amd64] \1 \2 \3\ndeb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports \2 \3|\" /etc/apt/sources.list > /etc/apt/sources.list.new" \
+        && sudo rm /etc/apt/sources.list \
+        && sudo mv /etc/apt/sources.list{.new,} \
+        && sudo apt-get update \
+        && sudo apt-get install {gcc,g++,pkg-config}-aarch64-linux-gnu libsdl2-dev:arm64 qt5-default:arm64
+    - name: Create build environment
+      run: mkdir ${{runner.workspace}}/build
+    - name: Configure
+      shell: bash
+      working-directory: ${{runner.workspace}}/build
+      run: |
+          CC=aarch64-linux-gnu-gcc CXX=aarch64-linux-gnu-g++ cmake -DPKG_CONFIG_EXECUTABLE=/usr/bin/aarch64-linux-gnu-pkg-config $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE
+    - name: Make
+      shell: bash
+      working-directory: ${{runner.workspace}}/build
+      run: |
+        make -j$(nproc --all) \
+        && mkdir dist \
+        && cp melonDS dist
+    - uses: actions/upload-artifact@v1
+      with:
+        name: melonDS
+        path: ${{runner.workspace}}/build/dist