在 Windows 上安装 python 库 cffi

Question

如果我pip install cffi，我得到这个：

building '_cffi_backend' extension
c:\mingw\bin\gcc.exe -mdll -O -Wall -Ic/libffi_msvc -IC:\python27\include -IC:\python27\PC -c c/_cffi_backend.c -o build\temp.win32-2.7\Release\c\_cffi_backend.o
...
(lots of warnings)
...
c/libffi_msvc\win32.c: In function 'ffi_call_x86':
c/libffi_msvc\win32.c:48:2: error: '_asm' undeclared (first use in this function)
c/libffi_msvc\win32.c:48:2: note: each undeclared identifier is reported only once for each function it appears in
c/libffi_msvc\win32.c:48:7: error: expected ';' before '{' token
c/libffi_msvc\win32.c:162:1: warning: control reaches end of non-void function [-Wreturn-type]
error: command 'gcc' failed with exit status 1

这显然是在使用 MinGW。

我也试过从 wheel 安装 here:

pip install https://pypi.python.org/packages/cp27/c/cffi/cffi-0.8.6-cp27-none-win32.whl#md5=aedc78351af65c4f514df0f2812473eb

我收到以下奇怪的错误：

Downloading/unpacking https://pypi.python.org/packages/cp27/c/cffi/cffi-0.8.6-cp27-none-win32.whl
  Downloading cffi-0.8.6-cp27-none-win32.whl (77kB): 77kB downloaded
  Running setup.py egg_info for package from https://pypi.python.org/packages/cp27/c/cffi/cffi-0.8.6-cp27-none-win32.whl
    Traceback (most recent call last):
      File "<string>", line 16, in <module>
    IOError: [Errno 2] No such file or directory: 'c:\users\me\appdata\local\temp\pip-nkx4aq-build\setup.py'

事实上，当我查看那个（临时）pip-nkx4aq-build 目录时，我发现那里没有 setup.py。

所以，我的问题只是，为什么会失败，我需要做什么才能在 Windows 上安装 cffi？

Answer 1

已知无效，欢迎投稿：

https://bitbucket.org/cffi/cffi/issue/159/python-setuppy-install-fails-with-mingw

Answer 2

您可以下载cffi二进制包并安装，link地址如下： http://www.lfd.uci.edu/~gohlke/pythonlibs/

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