trying multiplatform native build

.github/workflows/Linux_multi.yml

@@ -0,0 +1,117 @@
+name: Linux Multiplatform Build
+
+on:
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - '*.md'
+      - 'docs/**'
+  pull_request:
+    types: [opened, synchronize]
+    paths-ignore:
+      - '*.md'
+      - 'docs/**'
+  release:
+    types: [published]
+    paths-ignore:
+      - '*.md'
+      - 'docs/**'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    strategy:
+      fail-fast: true
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64/v8
+        os:
+          - ubuntu-24.04
+          - ubuntu-24.04-arm
+        exclude:
+          - os: ubuntu-24.04
+            platform: linux/arm64/v8
+          - os: ubuntu-24.04-arm
+            platform: linux/amd64
+        include:
+          - os: ubuntu-24.04
+            platform: linux/amd64
+            arch: x86_64
+          - os: ubuntu-24.04-arm
+            platform: linux/arm64/v8
+            arch: aarch64
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # Installs dependencies, including arm64 libraries (runs `sudo apt-get update` as part of it)
+      - name: Install dependencies
+        run: Packaging/nix/debian-host-prep.sh
+
+      - name: Cache CMake build folder
+        uses: actions/cache@v4
+        with:
+          path: build
+          key: ${{ github.workflow }}-v8-${{ github.sha }}
+          restore-keys: ${{ github.workflow }}-v8-
+
+      - name: Build
+        working-directory: ${{github.workspace}}
+        env:
+          CMAKE_BUILD_TYPE: ${{github.event_name == 'release' && 'Release' || 'RelWithDebInfo'}}
+        # We set DEVILUTIONX_SYSTEM_LIBFMT=OFF because its soversion changes frequently.
+        # We set DEVILUTIONX_SYSTEM_LIBSODIUM=OFF because its soversion changes frequently.
+        # We set DEVILUTIONX_SYSTEM_BZIP2=OFF because Fedora and Debian do not agree on how to link it.
+        run: |
+          cmake \
+            -S. \
+            -Bbuild \
+            -DCMAKE_BUILD_TYPE=${{env.CMAKE_BUILD_TYPE}} \
+            -DCMAKE_INSTALL_PREFIX=/usr \
+            -DCPACK=ON \
+            -DDISCORD_INTEGRATION=ON \
+            -DBUILD_TESTING=OFF \
+            -DDEVILUTIONX_SYSTEM_LIBFMT=OFF \
+            -DDEVILUTIONX_SYSTEM_LIBSODIUM=OFF \
+            -DDEVILUTIONX_SYSTEM_BZIP2=OFF && \
+          cmake --build build -j $(getconf _NPROCESSORS_ONLN) --target package
+
+      - name: Package
+        run: Packaging/nix/LinuxReleasePackaging.sh && mv devilutionx.tar.xz devilutionx-${{ matrix.arch }}-linux-gnu.tar.xz
+
+      - name: Package AppImage
+        run: Packaging/nix/AppImage.sh && mv devilutionx.appimage devilutionx-${{ matrix.arch }}-linux-gnu.appimage
+
+      - name: Upload Package
+        if: ${{ !env.ACT }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: devilutionx-${{ matrix.arch }}-linux-gnu.tar.xz
+          path: devilutionx-${{ matrix.arch }}-linux-gnu.tar.xz
+
+      - name: Upload AppImage
+        if: ${{ !env.ACT }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: devilutionx-${{ matrix.arch }}-linux-gnu.appimage
+          path: devilutionx-${{ matrix.arch }}-linux-gnu.appimage
+
+      - name: Update Release
+        if: ${{ github.event_name == 'release' && !env.ACT }}
+        uses: svenstaro/upload-release-action@v2
+        with:
+          file: devilutionx-${{ matrix.arch }}-linux-gnu.*
+          file_glob: true
+          overwrite: true
+
+      - name: Clean up artifacts
+        run: rm -rf build/_CPack_Packages build/package build/*.deb build/*.rpm build/*.appimage build/*.tar.xz