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libcxx-build-and-test.yaml
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# This file defines pre-commit CI for libc++, libc++abi, and libunwind (on Github).
#
# We split the configurations in multiple stages with the intent of saving compute time
# when a job fails early in the pipeline. This is why the jobs are marked as `continue-on-error: false`.
# We try to run the CI configurations with the most signal in the first stage.
#
# Stages 1 & 2 are meant to be "smoke tests", and are meant to catch most build/test failures quickly and without using
# too many resources.
# Stage 3 is "everything else", and is meant to catch breakages on more niche or unique configurations.
#
# Therefore, we "fail-fast" for any failures during stages 1 & 2, meaning any job failing cancels all other running jobs,
# under the assumption that if the "smoke tests" fail, then the other configurations will likely fail in the same way.
# However, stage 3 does not fail fast, as it's more likely that any one job failing is a flake or a configuration-specific
#
name: Build and Test libc++
on:
pull_request:
paths:
- 'libcxx/**'
- 'libcxxabi/**'
- 'libunwind/**'
- 'runtimes/**'
- 'cmake/**'
- '.github/workflows/libcxx-build-and-test.yaml'
schedule:
# Run nightly at 08:00 UTC (aka 00:00 Pacific, aka 03:00 Eastern)
- cron: '0 8 * * *'
permissions:
contents: read # Default everything to read-only
concurrency:
group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
cancel-in-progress: true
jobs:
stage1:
if: github.repository_owner == 'llvm'
runs-on: libcxx-self-hosted-linux
container: ghcr.io/llvm/libcxx-linux-builder:d8a0709b1090350a7fe3604d8ab78c7d62f10698
continue-on-error: false
strategy:
fail-fast: false
matrix:
config: [
'frozen-cxx03-headers',
'generic-cxx03',
'generic-cxx26',
'generic-modules'
]
cc: [ 'clang-19' ]
cxx: [ 'clang++-19' ]
include:
- config: 'generic-gcc'
cc: 'gcc-14'
cxx: 'g++-14'
steps:
- uses: actions/checkout@v4
- name: ${{ matrix.config }}.${{ matrix.cxx }}
run: libcxx/utils/ci/run-buildbot ${{ matrix.config }}
env:
CC: ${{ matrix.cc }}
CXX: ${{ matrix.cxx }}
- uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 # v4.3.0
if: always()
with:
name: ${{ matrix.config }}-${{ matrix.cxx }}-results
path: |
**/test-results.xml
**/*.abilist
**/CMakeConfigureLog.yaml
**/CMakeError.log
**/CMakeOutput.log
**/crash_diagnostics/*
stage2:
if: github.repository_owner == 'llvm'
runs-on: libcxx-self-hosted-linux
container: ghcr.io/llvm/libcxx-linux-builder:d8a0709b1090350a7fe3604d8ab78c7d62f10698
needs: [ stage1 ]
continue-on-error: false
strategy:
fail-fast: false
matrix:
config: [
'generic-cxx11',
'generic-cxx14',
'generic-cxx17',
'generic-cxx20',
'generic-cxx23'
]
cc: [ 'clang-19' ]
cxx: [ 'clang++-19' ]
include:
- config: 'generic-gcc-cxx11'
cc: 'gcc-14'
cxx: 'g++-14'
- config: 'generic-cxx23'
cc: 'clang-17'
cxx: 'clang++-17'
- config: 'generic-cxx26'
cc: 'clang-18'
cxx: 'clang++-18'
steps:
- uses: actions/checkout@v4
- name: ${{ matrix.config }}
run: libcxx/utils/ci/run-buildbot ${{ matrix.config }}
env:
CC: ${{ matrix.cc }}
CXX: ${{ matrix.cxx }}
- uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 # v4.3.0
if: always() # Upload artifacts even if the build or test suite fails
with:
name: ${{ matrix.config }}-${{ matrix.cxx }}-results
path: |
**/test-results.xml
**/*.abilist
**/CMakeConfigureLog.yaml
**/CMakeError.log
**/CMakeOutput.log
**/crash_diagnostics/*
stage3:
if: github.repository_owner == 'llvm'
needs: [ stage1, stage2 ]
continue-on-error: false
strategy:
fail-fast: false
max-parallel: 8
matrix:
config: [
'generic-abi-unstable',
'generic-hardening-mode-debug',
'generic-hardening-mode-extensive',
'generic-hardening-mode-fast',
'generic-hardening-mode-fast-with-abi-breaks',
'generic-merged',
'generic-modules-lsv',
'generic-no-exceptions',
'generic-no-experimental',
'generic-no-filesystem',
'generic-no-localization',
'generic-no-terminal',
'generic-no-random_device',
'generic-no-threads',
'generic-no-tzdb',
'generic-no-unicode',
'generic-no-wide-characters',
'generic-no-rtti',
'generic-optimized-speed',
'generic-static',
'bootstrapping-build'
]
machine: [ 'libcxx-self-hosted-linux' ]
include:
- config: 'generic-cxx26'
machine: libcxx-self-hosted-linux
- config: 'generic-asan'
machine: libcxx-self-hosted-linux
- config: 'generic-tsan'
machine: libcxx-self-hosted-linux
- config: 'generic-ubsan'
machine: libcxx-self-hosted-linux
# Use a larger machine for MSAN to avoid timeout and memory allocation issues.
- config: 'generic-msan'
machine: libcxx-self-hosted-linux
runs-on: ${{ matrix.machine }}
container: ghcr.io/llvm/libcxx-linux-builder:d8a0709b1090350a7fe3604d8ab78c7d62f10698
steps:
- uses: actions/checkout@v4
- name: ${{ matrix.config }}
run: libcxx/utils/ci/run-buildbot ${{ matrix.config }}
env:
CC: clang-19
CXX: clang++-19
- uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 # v4.3.0
if: always()
with:
name: ${{ matrix.config }}-results
path: |
**/test-results.xml
**/*.abilist
**/CMakeConfigureLog.yaml
**/CMakeError.log
**/CMakeOutput.log
**/crash_diagnostics/*
macos:
needs: [ stage1 ]
strategy:
fail-fast: false
matrix:
include:
- config: generic-cxx03
os: macos-15
- config: generic-cxx23
os: macos-15
- config: generic-modules
os: macos-15
- config: apple-configuration
os: macos-15
- config: apple-system
os: macos-13
- config: apple-system-hardened
os: macos-13
runs-on: ${{ matrix.os }}
steps:
- uses: actions/checkout@v4
- uses: maxim-lobanov/setup-xcode@v1
with:
xcode-version: 'latest'
- uses: seanmiddleditch/gha-setup-ninja@master
- name: Build and test
run: |
python3 -m venv .venv
source .venv/bin/activate
python -m pip install psutil
bash libcxx/utils/ci/run-buildbot ${{ matrix.config }}
- uses: actions/upload-artifact@26f96dfa697d77e81fd5907df203aa23a56210a8 # v4.3.0
if: always() # Upload artifacts even if the build or test suite fails
with:
name: macos-${{ matrix.config }}-results
path: |
**/test-results.xml
**/*.abilist
**/CMakeConfigureLog.yaml
**/CMakeError.log
**/CMakeOutput.log
**/crash_diagnostics/*
windows:
runs-on: windows-2022
needs: [ stage1 ]
strategy:
fail-fast: false
matrix:
include:
- { config: clang-cl-dll, mingw: false }
- { config: clang-cl-static, mingw: false }
- { config: clang-cl-no-vcruntime, mingw: false }
- { config: clang-cl-debug, mingw: false }
- { config: clang-cl-static-crt, mingw: false }
- { config: mingw-dll, mingw: true }
- { config: mingw-static, mingw: true }
- { config: mingw-dll-i686, mingw: true }
- { config: mingw-incomplete-sysroot, mingw: true }
steps:
- uses: actions/checkout@v4
- name: Install dependencies
run: |
choco install -y ninja
pip install psutil
- name: Install a current LLVM
if: ${{ matrix.mingw != true }}
run: |
choco install -y llvm --version=18.1.6 --allow-downgrade
- name: Install llvm-mingw
if: ${{ matrix.mingw == true }}
run: |
curl -LO https://github.com/mstorsjo/llvm-mingw/releases/download/20240606/llvm-mingw-20240606-ucrt-x86_64.zip
powershell Expand-Archive llvm-mingw*.zip -DestinationPath .
del llvm-mingw*.zip
mv llvm-mingw* c:\llvm-mingw
echo "c:\llvm-mingw\bin" | Out-File -FilePath $Env:GITHUB_PATH -Encoding utf8 -Append
- name: Simulate a from-scratch build of llvm-mingw
if: ${{ matrix.config == 'mingw-incomplete-sysroot' }}
run: |
rm -r c:\llvm-mingw\include\c++
rm -r c:\llvm-mingw\*-w64-mingw32\lib\libc++*
rm -r c:\llvm-mingw\*-w64-mingw32\lib\libunwind*
- name: Add Git Bash to the path
run: |
echo "c:\Program Files\Git\usr\bin" | Out-File -FilePath $Env:GITHUB_PATH -Encoding utf8 -Append
- name: Set up the MSVC dev environment
if: ${{ matrix.mingw != true }}
uses: ilammy/msvc-dev-cmd@v1
- name: Build and test
run: |
bash libcxx/utils/ci/run-buildbot ${{ matrix.config }}