centos 7下，安装shadowsocks，提示需要m2crypto依赖包，M2Crypto is required to use aes-256-cfb, please run `apt-get install python-m2crypto`
通过pip安装之，但提示错误消息如下
[root@fsc tmp]# pip install m2crypto
Downloading/unpacking m2crypto
Running setup.py egg_info for package m2crypto
Installing collected packages: m2crypto
Running setup.py install for m2crypto
building 'M2Crypto.__m2crypto' extension
swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
swig -python -I/usr/include/python2.7 -I/usr/include -I/usr/include/openssl -includeall -modern -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
/usr/include/openssl/opensslconf.h:31: Error: CPP #error ""This openssl-devel package does not work your architecture?"". Use the -cpperraswarn option to continue swig processing.
error: command 'swig' failed with exit status 1
Complete output from command /usr/bin/python -c "import setuptools;__file__='/tmp/pip-build-feng/m2crypto/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-vpkm7l-record/install-record.txt --single-version-externally-managed:
running install
running build
running build_py
running build_ext
building 'M2Crypto.__m2crypto' extension
swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
swig -python -I/usr/include/python2.7 -I/usr/include -I/usr/include/openssl -includeall -modern -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
/usr/include/openssl/opensslconf.h:31: Error: CPP #error ""This openssl-devel package does not work your architecture?"". Use the -cpperraswarn option to continue swig processing.
error: command 'swig' failed with exit status 1
----------------------------------------
Command /usr/bin/python -c "import setuptools;__file__='/tmp/pip-build-feng/m2crypto/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-vpkm7l-record/install-record.txt --single-version-externally-managed failed with error code 1 in /tmp/pip-build-feng/m2crypto
Storing complete log in /root/.pip/pip.log
安装m2crypto后，再pip安装即可。