# This workflow uses Zig and its excellent cross-compilation support to test
# compiling for multiple platforms. No tests are actually run since it would
# require emulation.
name: zig cross-compile

on: [ push, pull_request ]

jobs:
  build:
    name: ${{ matrix.ttriple }} cpp:${{ matrix.enable_cplusplus }} thr:${{ matrix.enable_threads }} dll:${{ matrix.shared_libs }}
    runs-on: ubuntu-latest

    strategy:
      fail-fast: false
      matrix:
        zig_version: [ "0.14.1" ]
        # Some of the triples are commented out just to speedup this workflow.
        ttriple: [
          aarch64-linux-gnu,
          #aarch64-linux-musl,
          aarch64-macos-none,
          aarch64-windows-gnu,
          #aarch64_be-linux-gnu,
          aarch64_be-linux-musl,
          #arc-linux-gnu, # FIXME: __linux__ macro is not predefined
          #arm-linux-gnueabi,
          arm-linux-gnueabihf,
          arm-linux-musleabi,
          #arm-linux-musleabihf,
          armeb-linux-gnueabi,
          #armeb-linux-gnueabihf,
          #armeb-linux-musleabi,
          armeb-linux-musleabihf,
          loongarch64-linux-gnu,
          #loongarch64-linux-gnusf, # FIXME: gnu/stubs-lp64s.h not found
          loongarch64-linux-musl,
          #m68k-linux-gnu, # FIXME: No available targets compatible with triple
          #m68k-linux-musl, # FIXME: No available targets compatible with triple
          #mips-linux-gnueabi,
          #mips-linux-gnueabihf,
          mips-linux-musleabi,
          mips-linux-musleabihf,
          mips64-linux-gnuabi64,
          #mips64-linux-gnuabin32,
          mips64-linux-muslabi64,
          mips64-linux-muslabin32,
          #mips64el-linux-gnuabi64,
          mips64el-linux-gnuabin32,
          mips64el-linux-muslabi64,
          mips64el-linux-muslabin32,
          mipsel-linux-gnueabi,
          #mipsel-linux-gnueabihf,
          mipsel-linux-musleabi,
          mipsel-linux-musleabihf,
          #powerpc-linux-gnueabi,
          powerpc-linux-gnueabihf,
          #powerpc-linux-musleabi,
          powerpc-linux-musleabihf,
          #powerpc64-linux-gnu, # FIXME: not implemented correctly in zig
          #powerpc64-linux-musl,
          #powerpc64le-linux-gnu,
          powerpc64le-linux-musl,
          riscv32-linux-gnu,
          riscv32-linux-musl,
          riscv64-linux-gnu,
          riscv64-linux-musl,
          s390x-linux-gnu,
          s390x-linux-musl,
          sparc-linux-gnu,
          sparc64-linux-gnu,
          thumb-linux-musleabi,
          #thumb-linux-musleabihf,
          thumb-windows-gnu,
          #thumbeb-linux-musleabi,
          thumbeb-linux-musleabihf,
          wasm32-wasi-musl,
          #x86-linux-gnu,
          x86-linux-musl,
          x86-windows-gnu,
          x86_64-linux-gnu.2.27, # with a glibc version
          x86_64-linux-gnux32,
          #x86_64-linux-musl,
          x86_64-linux-muslx32,
          x86_64-macos-none,
          x86_64-windows-gnu,
        ]
        enable_cplusplus: [ false, true ]
        enable_threads: [ false, true ]
        shared_libs: [ false, true ]
        exclude:
        - enable_threads: true
          ttriple: wasm32-wasi-musl
        - enable_cplusplus: false # excluded to speedup this workflow
          shared_libs: false
        - shared_libs: true # FIXME: SPARCv8 does not handle f128 in calls
          ttriple: sparc-linux-gnu
        - shared_libs: true # FIXME: recompile with -fPIC
          ttriple: sparc64-linux-gnu
        - shared_libs: true # FIXME: recompile with -fPIC
          ttriple: x86_64-linux-gnux32
        - shared_libs: true # FIXME: recompile with -fPIC
          ttriple: x86_64-linux-muslx32
        - shared_libs: true # FIXME: creating shared libs is not yet stable
          ttriple: wasm32-wasi-musl
        - enable_cplusplus: true # FIXME: ignoring -fno-PIC option
          ttriple: mips64-linux-muslabi64
        - enable_cplusplus: true # FIXME: ignoring -fno-PIC option
          ttriple: mips64el-linux-muslabi64
        # The following ones have some zig link issue.
        - enable_cplusplus: false
          ttriple: x86-linux-musl
        - enable_cplusplus: true
          shared_libs: true
          ttriple: x86-linux-musl

    steps:
    - uses: actions/checkout@v4
    - uses: korandoru/setup-zig@v1
      with:
        zig-version: ${{ matrix.zig_version }}
    - name: Build
      run: >
        zig build -Dtarget=${{ matrix.ttriple }}
        -DBUILD_SHARED_LIBS=${{ matrix.shared_libs }}
        -DCFLAGS_EXTRA="${{ matrix.cflags_extra }}"
        -Denable_cplusplus=${{ matrix.enable_cplusplus }}
        -Denable_threads=${{ matrix.enable_threads }}
        -Denable_werror