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Today, I'm going to install a pycrypto 2.6.1 module based on python3.6 on the Windows system, and unfortunately I reported a bunch of errors, as follows:

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

After a period of Baidu and Google and an attempt to install pycrypto 2.6.1 successfully, the specific solutions are as follows:

Set the environment variable for Microsoft Visual Studio 14.0, as shown in the figure:

Open cmd and execute the following command: set CL=/FI "% VCINSTALLDIR%\\ INCLUDE\\ stdint.h"% CL%

Reinstall pycrypto 2.6.1

Enter the pycrypto 2.6.1 directory through cmd and execute python setup.py install

The results are as follows:

Pycrypto 2.6.1 was successfully installed.

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