build-native.yml

name: Build LVGL Native Libraries

on:
  push:
    branches: [main, develop, master]
  pull_request:
    branches: [main, master]
  workflow_dispatch:
  workflow_call:

jobs:
  build:
    name: Build ${{ matrix.rid }}
    runs-on: ${{ matrix.os }}
    permissions:
      contents: read
    strategy:
      fail-fast: false
      matrix:
        include:
          # Windows — native and cross-compile via MSVC -A flag
          - rid: win-x64
            os: windows-latest
            cmake_generator: "Visual Studio 17 2022"
            cmake_arch: x64
          - rid: win-x86
            os: windows-latest
            cmake_generator: "Visual Studio 17 2022"
            cmake_arch: Win32
          - rid: win-arm64
            os: windows-latest
            cmake_generator: "Visual Studio 17 2022"
            cmake_arch: ARM64

          # Linux — native x64
          - rid: linux-x64
            os: ubuntu-latest
            cmake_extra: ""

          # Linux — ARM cross-compile (hard-float)
          - rid: linux-arm
            os: ubuntu-latest
            apt_packages: gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf
            cmake_extra: >-
              -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/libs/cmake/toolchains/arm-linux-gnueabihf.cmake

          # Linux — ARM64 cross-compile
          - rid: linux-arm64
            os: ubuntu-latest
            apt_packages: gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
            cmake_extra: >-
              -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/libs/cmake/toolchains/aarch64-linux-gnu.cmake

          # Linux — LoongArch64 cross-compile (requires Ubuntu 24.04)
          - rid: linux-loongarch64
            os: ubuntu-24.04
            apt_packages: gcc-loongarch64-linux-gnu g++-loongarch64-linux-gnu
            cmake_extra: >-
              -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/libs/cmake/toolchains/loongarch64-linux-gnu.cmake

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: recursive

      # ─── Copy lv_conf.h into the lvgl source tree ─────────────────────────
      # LVGL's CMake looks for lv_conf.h inside CMAKE_SOURCE_DIR (libs/lvgl/).
      # The file lives one level up at libs/lv_conf.h, so copy it in place.
      - name: Copy lv_conf.h into lvgl source directory
        shell: bash
        run: cp libs/lv_conf.h libs/lvgl/lv_conf.h

      # ─── Linux: optional cross-compilation toolchain ───────────────────────
      - name: Install cross-compilation toolchain
        if: ${{ matrix.apt_packages != '' && runner.os == 'Linux' }}
        run: |
          sudo apt-get update -qq
          sudo apt-get install -y ${{ matrix.apt_packages }}

      # ─── Windows build ──────────────────────────────────────────────────────
      - name: Configure CMake (Windows)
        if: runner.os == 'Windows'
        shell: bash
        run: |
          cmake -S libs/lvgl -B libs/lvgl/build_shared \
            -G "${{ matrix.cmake_generator }}" \
            -A "${{ matrix.cmake_arch }}" \
            -DCONFIG_LV_BUILD_EXAMPLES=OFF \
            -DCONFIG_LV_BUILD_DEMOS=OFF \
            -DCONFIG_LV_USE_THORVG_INTERNAL=OFF \
            -DBUILD_SHARED_LIBS=ON \
            -DCONFIG_LV_USE_PRIVATE_API=ON

      - name: Build (Windows)
        if: runner.os == 'Windows'
        shell: bash
        run: cmake --build libs/lvgl/build_shared --config Release

      # ─── Linux build ────────────────────────────────────────────────────────
      - name: Configure CMake (Linux)
        if: runner.os == 'Linux'
        run: |
          cmake -S libs/lvgl -B libs/lvgl/build_shared \
            -DCMAKE_BUILD_TYPE=Release \
            ${{ matrix.cmake_extra }} \
            -DCONFIG_LV_BUILD_EXAMPLES=OFF \
            -DCONFIG_LV_BUILD_DEMOS=OFF \
            -DCONFIG_LV_USE_THORVG_INTERNAL=OFF \
            -DBUILD_SHARED_LIBS=ON \
            -DCONFIG_LV_USE_PRIVATE_API=ON

      - name: Build (Linux)
        if: runner.os == 'Linux'
        run: cmake --build libs/lvgl/build_shared

      # ─── Collect outputs ────────────────────────────────────────────────────
      - name: Collect native library
        shell: bash
        run: |
          mkdir -p native_output
          # Windows: copy DLL from the Release subdirectory
          find libs/lvgl/build_shared -name "lvgl.dll" | head -1 | xargs -I{} cp {} native_output/ 2>/dev/null || true
          # Linux: prefer the unversioned symlink; copy and rename to strip any version suffix
          so=$(find libs/lvgl/build_shared -name "liblvgl.so" | head -1)
          if [ -n "$so" ]; then
            cp "$so" native_output/liblvgl.so
          fi
          ls -la native_output/

      - name: Upload native artifact
        uses: actions/upload-artifact@v4
        with:
          name: native-${{ matrix.rid }}
          path: native_output/
          if-no-files-found: error