[libc++] Update to Clang 21 as the oldest supported version (#186062)
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Nikolas Klauser
GitHub
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7 changed files with 18 additions and 24 deletions
22
.github/workflows/libcxx-build-and-test.yaml
vendored
22
.github/workflows/libcxx-build-and-test.yaml
vendored
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@ -47,8 +47,8 @@ jobs:
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'generic-cxx26',
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'generic-modules'
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]
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cc: [ 'clang-22' ]
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cxx: [ 'clang++-22' ]
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cc: [ 'clang-23' ]
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cxx: [ 'clang++-23' ]
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include:
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- config: 'generic-gcc'
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cc: 'gcc-15'
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@ -92,18 +92,18 @@ jobs:
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'generic-cxx20',
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'generic-cxx23'
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]
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cc: [ 'clang-22' ]
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cxx: [ 'clang++-22' ]
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cc: [ 'clang-23' ]
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cxx: [ 'clang++-23' ]
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include:
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- config: 'generic-gcc-cxx11'
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cc: 'gcc-15'
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cxx: 'g++-15'
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- config: 'generic-cxx26'
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cc: 'clang-22'
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cxx: 'clang++-22'
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- config: 'generic-cxx26'
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cc: 'clang-21'
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cxx: 'clang++-21'
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- config: 'generic-cxx26'
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cc: 'clang-20'
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cxx: 'clang++-20'
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steps:
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- uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
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with:
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@ -176,8 +176,8 @@ jobs:
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pip install -r libcxx/test/requirements.txt
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libcxx/utils/ci/run-buildbot ${{ matrix.config }}
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env:
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CC: clang-22
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CXX: clang++-22
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CC: clang-23
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CXX: clang++-23
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- uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
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if: always()
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with:
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@ -276,11 +276,11 @@ jobs:
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- name: Install a current LLVM
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if: ${{ matrix.mingw != true }}
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run: |
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choco install -y llvm --version=20.1.8 --allow-downgrade
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choco install -y llvm --version=21.1.8 --allow-downgrade
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- name: Install llvm-mingw
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if: ${{ matrix.mingw == true }}
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run: |
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curl -LO https://github.com/mstorsjo/llvm-mingw/releases/download/20250709/llvm-mingw-20250709-ucrt-${{ matrix.runner == 'windows-11-arm' && 'aarch64' || 'x86_64' }}.zip
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curl -LO https://github.com/mstorsjo/llvm-mingw/releases/download/20251216/llvm-mingw-20251216-ucrt-${{ matrix.runner == 'windows-11-arm' && 'aarch64' || 'x86_64' }}.zip
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powershell Expand-Archive llvm-mingw*.zip -DestinationPath .
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del llvm-mingw*.zip
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mv llvm-mingw* c:\llvm-mingw
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@ -131,7 +131,7 @@ velocity, libc++ drops support for older compilers as newer ones are released.
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============ =================== ========================== =====================
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Compiler Versions Restrictions Support policy
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============ =================== ========================== =====================
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Clang 20, 21, 22-git latest two stable releases per `LLVM's release page <https://releases.llvm.org>`_ and the development version
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Clang 21, 22, 23-git latest two stable releases per `LLVM's release page <https://releases.llvm.org>`_ and the development version
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AppleClang 26.0 latest stable release per `Xcode's release page <https://developer.apple.com/documentation/xcode-release-notes>`_
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Open XL 17.1.4 (AIX) latest stable release per `Open XL's documentation page <https://www.ibm.com/docs/en/openxl-c-and-cpp-aix>`_
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GCC 15 In C++11 or later only latest stable release per `GCC's release page <https://gcc.gnu.org/releases.html>`_
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@ -33,8 +33,8 @@
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// Warn if a compiler version is used that is not supported anymore
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// LLVM RELEASE Update the minimum compiler versions
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# if defined(_LIBCPP_CLANG_VER)
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# if _LIBCPP_CLANG_VER < 2001
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# warning "Libc++ only supports Clang 20 and later"
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# if _LIBCPP_CLANG_VER < 2101
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# warning "Libc++ only supports Clang 21 and later"
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# endif
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# elif defined(_LIBCPP_APPLE_CLANG_VER)
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# if _LIBCPP_APPLE_CLANG_VER < 1700
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@ -10,13 +10,6 @@
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# alphabetic macros. Also ensure that we don't swallow the definition of user
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# provided macros (in other words, ensure that we push/pop correctly everywhere).
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# This test fails with MSVC headers, with Clang 20 (and early 21 versions);
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# the headers end up pulling in Clang intrinsics headers, which in 20.x and
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# early 21.x versions use unreserved identifiers,
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# see https://github.com/llvm/llvm-project/issues/161808.
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#
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# UNSUPPORTED: clang-20 && msvc
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# RUN: %{python} %s %{libcxx-dir}/utils
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# END.
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@ -9,7 +9,7 @@
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// https://github.com/llvm/llvm-project/issues/30023
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// compare exchange does not work with types of which the size is not a power of 2
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// XFAIL: clang-20, clang-21, apple-clang-17
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// XFAIL: clang-21, apple-clang-17
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// UNSUPPORTED: c++03
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// TODO: remove the UNSUPPORTED clang-22 once libc++ CI's clang is updated to include
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@ -144,8 +144,8 @@ steps:
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- label: FreeBSD 13 amd64
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command: libcxx/utils/ci/run-buildbot generic-cxx26
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env:
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CC: clang20
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CXX: clang++20
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CC: clang21
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CXX: clang++21
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agents:
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queue: libcxx-builders
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os: freebsd
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@ -81,6 +81,7 @@ static void demangling_terminate_handler()
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__attribute__((noreturn))
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static void demangling_terminate_handler()
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{
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(void)cause;
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__abort_message("terminating");
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}
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#endif // !_LIBCXXABI_NO_EXCEPTIONS
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