如何将Python构建为fcyol的一部分

Question

我使用Yocto在ubuntux86、Raspberry Pi、BeagleBone Black和tiam57xx EVM（开发工具包）上构建和安装Python和pythontwisted。pythontwisted导入上述所有机器没有问题，除了AM57XX Dev Kit。它会显示以下错误：

Python 2.7.11 (default, Aug  7 2017, 12:07:27)
[GCC 5.3.1 20160113] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from txdbus import client,error
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/txdbus/client.py", line 11, in <module>
    from twisted.internet import defer, reactor
  File "/usr/lib/python2.7/site-packages/twisted/internet/reactor.py", line 39, in <module>
  File "/usr/lib/python2.7/site-packages/twisted/internet/epollreactor.py", line 405, in install
  File "/usr/lib/python2.7/site-packages/twisted/internet/epollreactor.py", line 235, in __init__
  File "/usr/lib/python2.7/site-packages/twisted/internet/base.py", line 498, in __init__
  File "/usr/lib/python2.7/site-packages/twisted/internet/posixbase.py", line 289, in installWaker
  File "/usr/lib/python2.7/site-packages/twisted/internet/posixbase.py", line 139, in __init__
  File "/usr/lib/python2.7/site-packages/twisted/internet/fdesc.py", line 25, in setNonBlocking
AttributeError: 'NoneType' object has no attribute 'fcntl'

如果我在板上启动Python并尝试导入fcntl模块，它确实缺少：

^{pr2}$

每台机器上的包装清单都是相同的。我错过了什么？内核需要进行不同的配置吗？在

当我在谷歌上搜索的时候，我发现了这个帖子： https://lists.yoctoproject.org/pipermail/yocto/2013-May/013953.html

这似乎表明Yocto的Python有一个问题，并且配置错误，因此不包括fcntl模块：

>> ImportError: No module named fcntl
>> ========
>> 
>> So it looks like the Python included with the SDK is crippled or mis-configured:
> 
> Yeah, the Python we build is split up massively, so clearly the SDK is
> missing the packages that are needed to run bitbake.  But as I said,
> using our SDK to build is over-complicating things as Ubuntu should
> work fine.  What problems were you seeing?

当Yocto构建Python时log.do\u包脚本提到了python fcntl所需的依赖关系，但它们看起来不像是错误：

log.do_package:DEBUG: runstrip: 'arm-linux-gnueabihf-strip' --remove-section=.comment --remove-section=.note --strip-unneeded '/home/me/am57xx/build/tmp-external-linaro-toolchain/work/armv7ahf-neon-linux-gnueabi/python/2.7.11-r1/package/usr/lib/python2.7/lib-dynload/fcntl.so'
log.do_package:DEBUG: LIBNAMES: pkg python-fcntl libs 0 bins 0 sonames []
log.do_package:DEBUG: calculating shlib provides for python-fcntl
log.do_package:DEBUG: LIBNAMES: pkg python-fcntl sonames []
log.do_package:DEBUG: calculating shlib requirements for python-fcntl
log.do_package:DEBUG: python-fcntl: Dependency libpython2.7.so.1.0 requires package libpython2 (used by files: /home/me/am57xx/build/tmp-external-linaro-toolchain/work/armv7ahf-neon-linux-gnueabi/python/2.7.11-r1/packages-split/python-fcntl/usr/lib/python2.7/lib-dynload/fcntl.so)
log.do_package:DEBUG: python-fcntl: Dependency libc.so.6 requires package external-linaro-toolchain (used by files: /home/me/am57xx/build/tmp-external-linaro-toolchain/work/armv7ahf-neon-linux-gnueabi/python/2.7.11-r1/packages-split/python-fcntl/usr/lib/python2.7/lib-dynload/fcntl.so)
log.do_package.17147:DEBUG: runstrip: 'arm-linux-gnueabihf-strip' --remove-section=.comment --remove-section=.note --strip-unneeded '/home/me/am57xx/build/tmp-external-linaro-toolchain/work/armv7ahf-neon-linux-gnueabi/python/2.7.11-r1/package/usr/lib/python2.7/lib-dynload/fcntl.so'
log.do_package.17147:DEBUG: LIBNAMES: pkg python-fcntl libs 0 bins 0 sonames []
log.do_package.17147:DEBUG: calculating shlib provides for python-fcntl
log.do_package.17147:DEBUG: LIBNAMES: pkg python-fcntl sonames []
log.do_package.17147:DEBUG: calculating shlib requirements for python-fcntl
log.do_package.17147:DEBUG: python-fcntl: Dependency libpython2.7.so.1.0 requires package libpython2 (used by files: /home/me/am57xx/build/tmp-external-linaro-toolchain/work/armv7ahf-neon-linux-gnueabi/python/2.7.11-r1/packages-split/python-fcntl/usr/lib/python2.7/lib-dynload/fcntl.so)
log.do_package.17147:DEBUG: python-fcntl: Dependency libc.so.6 requires package external-linaro-toolchain (used by files: /home/me/am57xx/build/tmp-external-linaro-toolchain/work/armv7ahf-neon-linux-gnueabi/python/2.7.11-r1/packages-split/python-fcntl/usr/lib/python2.7/lib-dynload/fcntl.so)
log.do_populate_sysroot:DEBUG: runstrip: 'arm-linux-gnueabihf-strip' --remove-section=.comment --remove-section=.note --strip-unneeded '/home/me/am57xx/build/tmp-external-linaro-toolchain/work/armv7ahf-neon-linux-gnueabi/python/2.7.11-r1/sysroot-destdir/usr/lib/python2.7/lib-dynload/fcntl.so'
log.do_populate_sysroot.17148:DEBUG: runstrip: 'arm-linux-gnueabihf-strip' --remove-section=.comment --remove-section=.note --strip-unneeded '/home/me/am57xx/build/tmp-external-linaro-toolchain/work/armv7ahf-neon-linux-gnueabi/python/2.7.11-r1/sysroot-destdir/usr/lib/python2.7/lib-dynload/fcntl.so'

所以我认为它构建了这个模块，但无法将其打包到我的根文件系统中。在

我下载了Python源代码，用“help”运行configure并搜索fcntl。在

./configure --help | grep fcntl

但是，没有结果！在

我可以对我的Yocto配置或Python方法做些什么来将fcntl部署到根文件系统？在

Answer 1

使用Yocto的最新配方构建最新的python2.7。在