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我使用Yocto在Ubuntu x86，Raspberry Pi，BeagleBone Black和TI AM57XX EVM（Dev Kit）上构建和安装Python和python-twisted。除了AM57XX开发工具包之外，Python-Twisted没有导入所有上述机器的问题。它吐出以下错误的：如何让Yocto构建模块fcntl作为Python的一部分构建
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'
如果我发动对板Python和尝试导入的fcntl模块，它确实是丢失：
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.
>>>
>>> import fcntl
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named fcntl
软件包列表是每台机器上相同。我错过了什么？内核是否需要配置不同？
虽然我是谷歌搜索的时候，我发现这个职位： https://lists.yoctoproject.org/pipermail/yocto/2013-May/013953.html
这似乎表明，Python从Yocto有一个问题，是错误配置，使其不包括的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构建的Python的脚本log.do_package提到了蟒蛇-的fcntl需要的依赖 - 但他们似乎并不像错误：
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模块，但无法将其打包到我的根文件系统中。
我下载了Python源代码，并运行“help”配置并搜索了fcntl。
./configure --help | grep fcntl
但是，没有结果！
我可以对我的Yocto配置或Python配方做些什么来将fcntl部署到根文件系统？
'./configure --help | grep fcntl'不应该产生任何结果。你可以'猫配置| grep fcntl'和'cat setup.py | grep fcntl'，但我不知道它有多相关。我知道_Yocto_蹲坐，但是你有访问_Python_生成日志吗？如何构建目录（检查_fcntl.so_是否存在）？ – CristiFati