今天准备在Windows系统上基于python3.6安装一个pycrypto 2.6.1模块，很不幸的报了一堆错误，如下所示：
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running install
running build
running build_py
running build_ext
warning: GMP or MPIR library not found; Not building Crypto.PublicKey._fastmath.
building 'Crypto.Random.OSRNG.winrandom' extension
C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\x86_amd64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -Isrc/ -Isrc/inc-msvc/ -IC:\Python36\include -IC:\Python36\include
winrand.c
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(26): error C2061: syntax error: identifier 'intmax_t'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(27): error C2061: syntax error: identifier 'rem'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(27): error C2059: syntax error: ';'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(28): error C2059: syntax error: '}'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(30): error C2061: syntax error: identifier 'imaxdiv_t'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(30): error C2059: syntax error: ';'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(40): error C2143: syntax error: missing '{' before '__cdecl'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(41): error C2146: syntax error: missing ')' before identifier '_Number'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(41): error C2061: syntax error: identifier '_Number'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(41): error C2059: syntax error: ';'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(42): error C2059: syntax error: ')'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(45): error C2143: syntax error: missing '{' before '__cdecl'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(46): error C2146: syntax error: missing ')' before identifier '_Numerator'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(46): error C2061: syntax error: identifier '_Numerator'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(46): error C2059: syntax error: ';'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(46): error C2059: syntax error: ','
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(48): error C2059: syntax error: ')'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(50): error C2143: syntax error: missing '{' before '__cdecl'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(56): error C2143: syntax error: missing '{' before '__cdecl'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(63): error C2143: syntax error: missing '{' before '__cdecl'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(69): error C2143: syntax error: missing '{' before '__cdecl'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(76): error C2143: syntax error: missing '{' before '__cdecl'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(82): error C2143: syntax error: missing '{' before '__cdecl'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(89): error C2143: syntax error: missing '{' before '__cdecl'
C:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt\inttypes.h(95): error C2143: syntax error: missing '{' before '__cdecl'
error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\x86_amd64\\cl.exe' failed with exit status 2
经过一番百度和Google以及尝试终于成功安装pycrypto 2.6.1，具体解决方法如下：
设置Microsoft Visual Studio 14.0的环境变量，如图：
打开cmd，执行如下命令：set CL=/FI"%VCINSTALLDIR%\\INCLUDE\\stdint.h" %CL%
重新安装pycrypto 2.6.1
通过cmd进入pycrypto 2.6.1目录，执行python setup.py install
结果如下所示：
成功安装pycrypto 2.6.1。。。。。。。
