After installing OpenSSL, downloading the pre-built Swig executable, and ensuring the openssl libraries are located in the default c:\pkg, pip install m2crypto results in:
...
C:\Program Files (x86)\gfortran\bin\gcc.exe -mno-cygwin -mdll -O -Wall -IC:\Pyth
on27\include -IC:\Python27\PC -Ic:\pkg\include -Ic:\users\evbo\appdata\local\tem
p\pip_build_evbo\m2crypto\SWIG -c SWIG/_m2crypto_wrap.c -o build\temp.win32-2.7\
Release\swig\_m2crypto_wrap.o -DTHREADING
gcc: error: unrecognized command line option '-mno-cygwin'
error: command 'gcc' failed with exit status 1
It seems the binary installer solution for M2crypto is no longer available and I don't see any mistakes I've made based on the M2crypto install doc.
How might I resolve this install issue? Is there a dependency on older versions of GCC?
I got lucky - there's an unofficial binary installer in lieu of chandlerproject.org/bin/view/Projects/MeTooCrypto being down:
The https://gitlab.com/m2crypto/m2crypto project provides Windows builds of M2Crypto.
I installed the M2Crypto-0.30.1-cp27-cp27m-win_amd64.whl wheel from https://ci.appveyor.com/project/dwoz/m2crypto → https://ci.appveyor.com/project/dwoz/m2crypto/build/job/y7yri08k45mn5nlj/artifacts and it worked flawlessly.
Here's how to do it with pip for 64-bit Python 2.7:
pip install https://ci.appveyor.com/api/buildjobs/y7yri08k45mn5nlj/artifacts/dist/M2Crypto-0.30.1-cp27-cp27m-win_amd64.whl
来源：https://stackoverflow.com/questions/25110774/how-to-install-m2crypto-on-windows