Microsoft Windows Python-3.6 PyCrypto installation error

Solution 1:

The file include\pyport.h in Python installation directory does not have #include < stdint.h > anymore. This leaves intmax_t undefined.

A workaround for Microsoft VC compiler is to force include stdint.h via OS environment variable CL:

1. Open command prompt
2. Setup VC environment by runing vcvars*.bat (choose file name depending on VC version and architecture)
3. set CL=-FI"Full-Path\stdint.h" (use real value for Full-Path for the environment)
4. pip install pycrypto

Solution 2:

I've succeeded install pycrypto 2.6.1 on python 3.6, Windows 10, Visual Studio 2017.

1. Open "x86_x64 Cross-Tools Command Prompt for VS 2017" with administrator privilege in start menu.

2. set CL=-FI"%VCINSTALLDIR%Tools\MSVC\14.11.25503\include\stdint.h"

3. pip install pycrypto