【发布时间】：2016-12-02 08:08:31
【问题描述】：
我继承了一个基于 Open Embedded / Yocto 的项目，我需要为其修改操作系统映像。我想添加一个新的 python 模块 - pycrypto。在我进行更改之前，项目构建得很好。
我为 pycrypto 添加了以下 BitBake 配方：
DESCRIPTION = "Python crypto"
SECTION = "devel/python"
LICENSE = "PD"
SRC_URI = "https://pypi.python.org/packages/source/p/pycrypto/pycrypto-${PV}.tar.gz"
SRC_URI[md5sum] = "55a61a054aa66812daf5161a0d5d7eda"
SRC_URI[sha256sum] = "f2ce1e989b272cfcb677616763e0a2e7ec659effa67a88aa92b3a65528f60a3c"
LIC_FILES_CHKSUM = "file://README;md5=453a552a607fd82384e25db312340e9a"
S = "${WORKDIR}/pycrypto-${PV}"
inherit setuptools
作为 python-crypto_2.6.1.bb.
然后我在我的主要操作系统映像配方中使用它：
PYTHON_INSTALL = " \
python-ctypes python-subprocess python-threading python-json \
python-pyopenssl python-audio python-bsddb python-codecs python-compile python-compiler python-compression python-core python-crypt python-curses python-datetime python-db python-debugger python-dev python-difflib python-distutils python-doctest python-elementtree python-email python-fcntl python-gdbm python-hotshot python-html python-idle python-image python-io python-lang python-logging python-mailbox python-math python-mime python-mmap python-multiprocessing python-netclient python-netserver python-numbers python-pickle python-pkgutil python-pprint python-profile python-pydoc python-re python-readline python-resource python-robotparser python-shell python-smtpd python-sqlite3 python-sqlite3-tests python-stringold python-syslog python-terminal python-tests python-textutils python-tkinter python-unittest python-unixadmin python-xml python-xmlrpc python-zlib python-modules python-pyserial python-misc python-mysql python-crypto\
"
当构建执行 (bitbake my-image) 时，检索 pycrypto 的源代码似乎一切正常。然而，编译后，configure 尝试运行交叉编译的程序——这不起作用（它是为不同的架构构建的）并停止 bitbake 创建我的图像。
这是日志文件：
DEBUG: Executing shell function do_compile
running build
running build_py
running build_ext
running build_configure
checking for gcc... arm-poky-linux-gnueabi-gcc -march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a8 --sysroot=/media/parallels/build/tmp/sysroots/overo
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... configure: error: in `/media/parallels/build/tmp/work/cortexa8hf-vfp-neon-poky-linux-gnueabi/python-crypto/2.6.1-r0/pycrypto-2.6.1':
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details
Traceback (most recent call last):
File "setup.py", line 456, in <module>
core.setup(**kw)
File "/media/parallels/build/tmp/sysroots/x86_64-linux/usr/lib/python2.7/distutils/core.py", line 151, in setup
dist.run_commands()
File "/media/parallels/build/tmp/sysroots/x86_64-linux/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands
self.run_command(cmd)
File "/media/parallels/build/tmp/sysroots/x86_64-linux/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
cmd_obj.run()
File "/media/parallels/build/tmp/sysroots/x86_64-linux/usr/lib/python2.7/distutils/command/build.py", line 127, in run
self.run_command(cmd_name)
File "/media/parallels/build/tmp/sysroots/x86_64-linux/usr/lib/python2.7/distutils/cmd.py", line 326, in run_command
self.distribution.run_command(command)
File "/media/parallels/build/tmp/sysroots/x86_64-linux/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
cmd_obj.run()
File "setup.py", line 251, in run
self.run_command(cmd_name)
File "/media/parallels/build/tmp/sysroots/x86_64-linux/usr/lib/python2.7/distutils/cmd.py", line 326, in run_command
self.distribution.run_command(command)
File "/media/parallels/build/tmp/sysroots/x86_64-linux/usr/lib/python2.7/distutils/dist.py", line 972, in run_command
cmd_obj.run()
File "setup.py", line 278, in run
raise RuntimeError("autoconf error")
RuntimeError: autoconf error
ERROR: python setup.py build_ext execution failed.
WARNING: exit code 1 from a shell command.
ERROR: Function failed: do_compile (log file is located at /media/parallels/build/tmp/work/cortexa8hf-vfp-neon-poky-linux-gnueabi/python-crypto/2.6.1-r0/temp/log.do_compile.6553)
我正在从 x64 主机构建并针对 ARM 处理器。
日志文件中的建议似乎是合理的——“如果您打算交叉编译，请使用 `--host'。” - 唯一的问题是在哪里我应该使用--host？
此外，对现有项目源的搜索显示没有使用--host 的其他实例，这有点令人不安，而且这一切都是为 ARM 构建的，所以也许这条消息让我误入歧途。
任何人都可以帮助配置 BitBake/automake/whatever-part-of-the-Open-Embedded-toolchain，这样一旦我的模块被交叉编译，它就不会尝试在我的主机上执行它（错误的架构)?
谢谢！
【问题讨论】：
标签： python cross-compiling distutils bitbake openembedded