libc-fullbuild-tests.yml

# This workflow is for pre-commit testing of the LLVM-libc project.
name: LLVM-libc Pre-commit Fullbuild Tests
permissions:
  contents: read
on:
  pull_request:
    paths:
      - 'libc/**'
      - '.github/workflows/libc-fullbuild-tests.yml'

jobs:
  libc-fullbuild:
    if: github.repository_owner == 'llvm'
    timeout-minutes: 60
    name: libc-fullbuild on ${{ matrix.name }}
    runs-on: ${{ matrix.os }}
    container:
      image: ${{ (startsWith(matrix.os, 'ubuntu-24.04-arm') && 
        'ghcr.io/llvm/arm64v8/libc-ubuntu-24.04:latest@sha256:138636a45bb70f7b51a858b282e66291cb3c5c85371afee09032a5e09b263395') ||
        'ghcr.io/llvm/libc-ubuntu-24.04:latest@sha256:a902fb53bdad5e4a4bb6c11b6584e717a7b3d6e886f1ea58e11f95e46226249c'}}
      # We need to enable privileged containers so that certain libc tests
      # have the necessary permissions (like SYS_TIME). There are no security
      # implications as we are already running in an isolated VM.
      options: >-
        --privileged
    strategy:
      fail-fast: false
      matrix:
        # Build basic linux configuration with Debug/Release/MinSizeRel and all
        # other configurations in Debug only.
        include:
          - name: linux-x86_64-Debug
            os: ubuntu-24.04
            build_type: Debug
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: x86_64-unknown-linux-llvm
            include_scudo: ON
            testing: BUILD
          - name: linux-x86_64-Release
            os: ubuntu-24.04
            build_type: Release
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: x86_64-unknown-linux-llvm
            include_scudo: ON
            build_fuzzing_tests: ON
          - name: linux-x86_64-MinSizeRel
            os: ubuntu-24.04
            build_type: MinSizeRel
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: x86_64-unknown-linux-llvm
            include_scudo: ON
            testing: BUILD
          - name: linux-aarch64-clang
            os: ubuntu-24.04-arm
            build_type: Release
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: aarch64-unknown-linux-llvm
            include_scudo: ON
          - name: uefi-x86_64-clang
            os: ubuntu-24.04
            build_type: MinSizeRel
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: x86_64-unknown-uefi-llvm
            testing: SKIP
          - name: baremetal-armv6m
            os: ubuntu-24.04
            build_type: MinSizeRel
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: armv6m-none-eabi
            testing: SKIP
          - name: baremetal-armv7m
            os: ubuntu-24.04
            build_type: MinSizeRel
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: armv7m-none-eabi
            testing: SKIP
          - name: baremetal-armv7em
            os: ubuntu-24.04
            build_type: MinSizeRel
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: armv7em-none-eabi
            testing: SKIP
          - name: baremetal-armv8m
            os: ubuntu-24.04
            build_type: MinSizeRel
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: armv8m.main-none-eabi
            testing: SKIP
          - name: baremetal-armv8.1m
            os: ubuntu-24.04
            build_type: MinSizeRel
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: armv8.1m.main-none-eabi
            testing: SKIP
          - name: baremetal-riscv32
            os: ubuntu-24.04
            build_type: MinSizeRel
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: riscv32-unknown-elf
            testing: SKIP
          - name: amd-gpu
            os: ubuntu-24.04
            build_type: Release
            c_compiler: clang-23
            cpp_compiler: clang++-23
            target: amdgcn-amd-amdhsa
            testing: SKIP
          # TODO: add back gcc build when it is fixed
          # - c_compiler: gcc
          #   cpp_compiler: g++
    steps:
    - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
      with:
        persist-credentials: false

    # Libc's build is relatively small comparing with other components of LLVM.
    # A fresh fullbuild takes about 190MiB of uncompressed disk space, which can
    # be compressed into ~40MiB. Limiting the cache size to 1G should be enough.
    # Prefer sccache as it is more modern.
    # Do not use direct GHAC access even though it is supported by sccache. GHAC rejects
    # frequent small object writes.
    - name: Setup ccache
      uses: hendrikmuhs/ccache-action@d62db5f07c26379fc4b4e0916f098a92573c3b03 # v1.2.23
      with:
        max-size: 1G
        key: libc_fullbuild_v3_${{ matrix.target }}_${{ matrix.build_type }}_${{ matrix.c_compiler }}
        variant: sccache

    # Configure libc fullbuild with scudo.
    - name: Configure CMake
      run: |
        export RUNTIMES="libc"

        export CMAKE_FLAGS="
          -G Ninja
          -S /__w/llvm-project/llvm-project/runtimes
          -B build
          -DCMAKE_ASM_COMPILER=${{ matrix.c_compiler }}
          -DCMAKE_C_COMPILER=${{ matrix.c_compiler }}
          -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }}
          -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
          -DCMAKE_C_COMPILER_LAUNCHER=sccache
          -DCMAKE_CXX_COMPILER_LAUNCHER=sccache
          -DLLVM_USE_LINKER=lld-23
          -DCMAKE_INSTALL_PREFIX=/__w/llvm-project/llvm-project/install
          -DLIBC_COMPILE_OPTIONS_NATIVE=''
        "

        if [[ "${{ matrix.testing }}" != "SKIP" ]]; then
          export CMAKE_FLAGS="$CMAKE_FLAGS
            -DLIBC_TEST_SKIP_DEATH_TESTS=ON
            -DLIBC_TEST_SKIP_SHARED_TESTS=ON
          "
        fi

        if [[ "${{ matrix.include_scudo }}" == "ON" || "${{ matrix.build_fuzzing_tests }}" == "ON" ]]; then
          export RUNTIMES="$RUNTIMES;compiler-rt"
        fi

        if [[ "${{ matrix.include_scudo }}" == "ON" ]]; then
          export CMAKE_FLAGS="$CMAKE_FLAGS
            -DLLVM_LIBC_INCLUDE_SCUDO=ON
            -DCOMPILER_RT_BUILD_SCUDO_STANDALONE_WITH_LLVM_LIBC=ON
            -DCOMPILER_RT_BUILD_GWP_ASAN=OFF
            -DCOMPILER_RT_SCUDO_STANDALONE_BUILD_SHARED=OFF"
        fi

        case "${{ matrix.name }}" in
          baremetal-* )
            cmake $CMAKE_FLAGS \
              -C /__w/llvm-project/llvm-project/libc/cmake/caches/${{ matrix.target }}.cmake
            ;;
          *-gpu | uefi-* )
            cmake \
              -DLLVM_DEFAULT_TARGET_TRIPLE=${{ matrix.target }} \
              -DLIBC_TARGET_TRIPLE=${{ matrix.target }} \
              -DLLVM_ENABLE_RUNTIMES="$RUNTIMES" \
              -DLLVM_LIBC_FULL_BUILD=ON \
              $CMAKE_FLAGS
            ;;
          * )
            cmake \
              -DLLVM_ENABLE_RUNTIMES="$RUNTIMES" \
              -DLLVM_LIBC_FULL_BUILD=ON \
              $CMAKE_FLAGS
            ;;
        esac

    - name: Build
      shell: bash
      run: |
        TARGETS="install"
        if [[ "${{ matrix.build_fuzzing_tests }}" == "ON" ]]; then
          TARGETS="$TARGETS libc-fuzzer"
        fi

        cmake \
          --build build \
          --parallel \
          --target $TARGETS

    - name: Build Test
      if: ${{ matrix.testing != 'SKIP' }}
      run: >
        cmake 
        --build build 
        --parallel
        --target check-libc-build

    - name: Run Test
      if: ${{ matrix.testing != 'SKIP' && matrix.testing != 'BUILD' }}
      run: >
        cmake 
        --build build 
        --parallel
        --target check-libc