Microsoft Windows Python-3.6 PyCrypto installation error

Question

pip install pycrypto works fine with python3.5.2 but fails with python3.6 with the following error:

inttypes.h(26): error C2061: syntax error: identifier 'intmax_t'

Answer 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