用Python做langflow的时候，遇到一个奇怪的问题：
Mac 英特尔芯片的本子，导入hnswlib依赖的时候报错
环境：python3
错误信息：

Building wheels for collected packages: hnswlib
  Building wheel for hnswlib (pyproject.toml) ... error
  error: subprocess-exited-with-error

  × Building wheel for hnswlib (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [17 lines of output]
      running bdist_wheel
      running build
      running build_ext
      creating var
      creating var/folders
      creating var/folders/cv
      creating var/folders/cv/dtvck8ws72q79_jsyp4scr9h0000gn
      creating var/folders/cv/dtvck8ws72q79_jsyp4scr9h0000gn/T
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.9/Headers -arch arm64 -arch x86_64 -Werror=implicit-function-declaration -Wno-error=unreachable-code -I/Users/lifengdi/WorkSpaces/PycharmProjects/langflow/venv/include -I/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/include/python3.9 -c /var/folders/cv/dtvck8ws72q79_jsyp4scr9h0000gn/T/tmpjn2j37vr.cpp -o var/folders/cv/dtvck8ws72q79_jsyp4scr9h0000gn/T/tmpjn2j37vr.o -std=c++14
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.9/Headers -arch arm64 -arch x86_64 -Werror=implicit-function-declaration -Wno-error=unreachable-code -I/Users/lifengdi/WorkSpaces/PycharmProjects/langflow/venv/include -I/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/include/python3.9 -c /var/folders/cv/dtvck8ws72q79_jsyp4scr9h0000gn/T/tmpvj2j9km2.cpp -o var/folders/cv/dtvck8ws72q79_jsyp4scr9h0000gn/T/tmpvj2j9km2.o -fvisibility=hidden
      building 'hnswlib' extension
      creating build
      creating build/temp.macosx-10.9-universal2-cpython-39
      creating build/temp.macosx-10.9-universal2-cpython-39/python_bindings
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.9/Headers -arch arm64 -arch x86_64 -Werror=implicit-function-declaration -Wno-error=unreachable-code -I/private/var/folders/cv/dtvck8ws72q79_jsyp4scr9h0000gn/T/pip-build-env-8f2y000v/overlay/lib/python3.9/site-packages/pybind11/include -I/private/var/folders/cv/dtvck8ws72q79_jsyp4scr9h0000gn/T/pip-build-env-8f2y000v/overlay/lib/python3.9/site-packages/numpy/core/include -I./hnswlib/ -I/Users/lifengdi/WorkSpaces/PycharmProjects/langflow/venv/include -I/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/include/python3.9 -c ./python_bindings/bindings.cpp -o build/temp.macosx-10.9-universal2-cpython-39/./python_bindings/bindings.o -O3 -march=native -stdlib=libc++ -mmacosx-version-min=10.7 -DVERSION_INFO=\"0.7.0\" -std=c++14 -fvisibility=hidden
      clang: error: the clang compiler does not support '-march=native'
      error: command '/usr/bin/clang' failed with exit code 1
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for hnswlib
Failed to build hnswlib
ERROR: Could not build wheels for hnswlib, which is required to install pyproject.toml-based projects

解决办法：

export HNSWLIB_NO_NATIVE=1

除非注明，否则均为李锋镝的博客原创文章，转载必须以链接形式标明本文链接

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