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[CI] Static-link libstdc++ for Linux wheel builds #19804

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[CI] Static-link libstdc++ for Linux wheel builds #19804

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4 changes: 4 additions & 0 deletions .github/actions/build-wheel-for-publish/action.yml
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Expand Up @@ -130,9 +130,13 @@ runs:
CIBW_ENVIRONMENT_MACOS: >-
CMAKE_PREFIX_PATH="/opt/llvm"
CMAKE_ARGS="-DUSE_LLVM='/opt/llvm/bin/llvm-config --link-static' -DZLIB_USE_STATIC_LIBS=ON -DCMAKE_PREFIX_PATH=/opt/llvm ${{ inputs.cmake_defines }}"
# Statically link libstdc++/libgcc on Linux: the C++20 gcc-toolset (>=12) emits
# libstdc++ symbols newer than the manylinux_2_28 runtime baseline (e.g.
# _M_replace_cold @ GLIBCXX_3.4.30), so the wheel would otherwise fail to load.
CIBW_ENVIRONMENT_LINUX: >-
CMAKE_PREFIX_PATH="/opt/llvm"
LIBRARY_PATH="/opt/llvm/lib"
LDFLAGS="-static-libstdc++ -static-libgcc"

@gemini-code-assist gemini-code-assist Bot Jun 17, 2026

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high

While adding LDFLAGS="-static-libstdc++ -static-libgcc" here statically links the C++ runtime for libtvm.so and libtvm_runtime.so built during the main wheel build, the CUDA runtime sidecar libtvm_runtime_cuda.so (specified in TVM_PACKAGE_EXTRA_LIBS) is built separately via ci/scripts/package/manylinux_build_libtvm_runtime_cuda.sh. If libtvm_runtime_cuda.so is built in a container with a newer GCC/toolset, it will still dynamically link against the newer libstdc++ and fail to load on older host environments with the same undefined symbol error. To address this, also statically link libstdc++ and libgcc when building libtvm_runtime_cuda.so by passing -DCMAKE_SHARED_LINKER_FLAGS="-static-libstdc++ -static-libgcc" to the cmake command in ci/scripts/package/manylinux_build_libtvm_runtime_cuda.sh.

CMAKE_ARGS="-DUSE_LLVM='/opt/llvm/bin/llvm-config --link-static' -DZLIB_USE_STATIC_LIBS=ON -DCMAKE_PREFIX_PATH=/opt/llvm ${{ inputs.cmake_defines }} -DTVM_PACKAGE_EXTRA_LIBS=/project/build-wheel-cuda/lib/libtvm_runtime_cuda.so"
CIBW_ENVIRONMENT_WINDOWS: >-
CMAKE_PREFIX_PATH="C:/opt/llvm/Library"
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