error pip build_error ai_generated partial

error: subprocess-exited-with-error: Cython.Compiler.Errors.CompileError: /path/to/file.pyx:1:0: 'header.h' not found

ID: pip/error-from-pip-subprocess-to-build-wheel-with-missing-cython-header

Also available as: JSON · Markdown · 中文
82%Fix Rate
86%Confidence
1Evidence
2024-03-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
pip 21.3+ active — — —
Python 3.8-3.12 active — — —
Cython 0.29.x, 3.0.x active — — —
setuptools 58+ active — — —

Root Cause

A Cython extension requires a C header file that is missing from the system's include path or the package's source distribution.

generic

中文

Cython 扩展需要一个 C 头文件，但该文件在系统的包含路径或包的源代码分发中缺失。

Official Documentation

https://cython.readthedocs.io/en/latest/src/userguide/source_files_and_compilation.html

Workarounds

  1. 90% success Install the system development package: sudo apt-get install libfoo-dev # Debian/Ubuntu, or sudo yum install libfoo-devel # RHEL/CentOS 
    Install the system development package: sudo apt-get install libfoo-dev  # Debian/Ubuntu, or sudo yum install libfoo-devel  # RHEL/CentOS
  2. 75% success pip install <package> --no-binary :all: --global-option='build_ext' --global-option='-I/path/to/include' 
    pip install <package> --no-binary :all: --global-option='build_ext' --global-option='-I/path/to/include'
  3. 80% success Use a pre-built wheel from an alternative index: pip install <package> --only-binary :all: -i https://download.pytorch.org/whl/cpu # Example for PyTorch with CPU-only 
    Use a pre-built wheel from an alternative index: pip install <package> --only-binary :all: -i https://download.pytorch.org/whl/cpu  # Example for PyTorch with CPU-only

中文步骤

  1. 安装系统开发包：sudo apt-get install libfoo-dev  # Debian/Ubuntu，或 sudo yum install libfoo-devel  # RHEL/CentOS
  2. pip install <包名> --no-binary :all: --global-option='build_ext' --global-option='-I/path/to/include'
  3. 使用来自替代索引的预构建 wheel：pip install <包名> --only-binary :all: -i https://download.pytorch.org/whl/cpu  # PyTorch CPU 版示例

Dead Ends

Common approaches that don't work:

  1. Installing the missing header via pip (e.g., pip install libfoo-dev) 85% fail

    Header files are usually provided by system packages (e.g., libfoo-dev on Debian/Ubuntu), not Python packages.

  2. Using --no-build-isolation to use the host environment's Cython version 90% fail

    The error is about a missing header, not Cython version mismatch; build isolation does not affect header availability.

  3. Setting CFLAGS environment variable to point to a custom include path 60% fail

    While this can work, many users incorrectly set the path or use wrong syntax; also requires knowing the exact header location.