Question

我正在尝试通过buildroot安装我的python 2.7安装subprocess32。它似乎安装正确，但当我在嵌入式系统上导入它时，我收到一个错误：

>>> import subprocess32
/usr/lib/python2.7/site-packages/subprocess32.py:472: RuntimeWarning: The _posixsubprocess module is not being used. Child process reliability may suffer if your pro
gram uses threads.
  "program uses threads.", RuntimeWarning)

遵循此路径我尝试导入_posixsubprocess

import _posixsubprocess
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dynamic module does not define init function (init_posixsubprocess)

subprocess32似乎有它自己的版本，在这种情况下它不起作用？

这是我的make文件：

#############################################################
#
# Subprocess32 module for python
#
#############################################################

SUBPROCESS32_VERSION = 3.2.7
SUBPROCESS32_SOURCE = subprocess32-$(SUBPROCESS32_VERSION).tar.gz
SUBPROCESS32_SITE = https://pypi.python.org/pypi/subprocess32

SUBPROCESS32_DEPENDENCIES = python

define SUBPROCESS32_BUILD_CMDS
        (cd $(@D); $(HOST_DIR)/usr/bin/python setup.py build)
endef

define SUBPROCESS32_INSTALL_TARGET_CMDS
        (cd $(@D); $(HOST_DIR)/usr/bin/python setup.py install --prefix=$(TARGET_DIR)/usr)
endef

$(eval $(call GENTARGETS,package,subprocess32))

有一篇类似的帖子关于这个Python Error The _posixsubprocess module is not being used但是答案是评论中的链接已经死了。对我的问题有任何想法吗？

setup.py：

#!/usr/bin/python

import os
import sys
from distutils.core import setup, Extension


def main():
    if sys.version_info[0] != 2:
        sys.stderr.write('This backport is for Python 2.x only.\n')
        sys.exit(1)

    ext = Extension('_posixsubprocess', ['_posixsubprocess.c'],
                    depends=['_posixsubprocess_helpers.c'])
    if os.name == 'posix':
        ext_modules = [ext]
    else:
        ext_modules = []

    setup(
      name='subprocess32',
      version='3.2.7',
      description='A backport of the subprocess module from Python 3.2/3.3 for use on 2.x.',
      long_description="""
This is a backport of the subprocess standard library module from
Python 3.2 & 3.3 for use on Python 2.
It includes bugfixes and some new features.  On POSIX systems it is
guaranteed to be reliable when used in threaded applications.
It includes timeout support from Python 3.3 but otherwise matches
3.2's API.  It has not been tested on Windows.""",
      license='PSF license',

      maintainer='Gregory P. Smith',
      maintainer_email='greg@krypto.org',
      url='https://github.com/google/python-subprocess32',

      ext_modules=ext_modules,
      py_modules=['subprocess32'],

      classifiers=[
          'Intended Audience :: Developers',
          'Topic :: Software Development :: Libraries',
          'Development Status :: 5 - Production/Stable',
          'License :: OSI Approved :: Python Software Foundation License',
          'Operating System :: POSIX',
          'Operating System :: POSIX :: BSD',
          'Operating System :: POSIX :: Linux',
          'Operating System :: POSIX :: SunOS/Solaris',
          'Programming Language :: Python :: 2.4',
          'Programming Language :: Python :: 2.5',
          'Programming Language :: Python :: 2.6',
          'Programming Language :: Python :: 2.7',
          'Programming Language :: Python :: 2 :: Only',
          'Programming Language :: Python :: Implementation :: CPython',
      ],
    )


if __name__ == '__main__':
    main()

Answer 1

我不确定您使用的是哪个Buildroot版本，但如果它仍然是使用GENTARGETS宏并且没有python-package基础结构的版本，那么它必须是真的，真的，真的老版本。请先升级，因为近年来在Python支持中已经做了很多修复。

Answer 2

问题是distutils使用了错误的编译器来构建共享对象（其他对象使用了正确的编译器）。在构建阶段设置以下LDSHARED变量解决了问题：

 LDSHARED="$(TARGET_CC) -pthread -shared"

问题导入subprocess32

2 个答案: