安装M2Crypto

项目上有依赖问题，requirement.txt. 使用 pip -r requirement 的方式去安装。发现其中M2Crypto 一直安装不上。对这种问题我最为头疼。

• 碰到个别出问题一般先单独处理。先单独安装M2Crypto，再安装整个requirement。

安装相应的包

google 大法好：

直接google

mac m2crypto 安装失败

得到这这一篇
http://www.iops.cc/install-m2crypto-failed-with-mac-os-x/
意思是安装一个swig 组件，然后安装低版本的M2Crypto。

pip uninstall m2crypto  
brew uninstall swig --force

# Install swig 3.0.4 and compile m2crypto
brew update  
brew search swig  
brew install homebrew/versions/swig304  
brew link homebrew/versions/swig304  
pip install m2crypto  

在我本机上执行

brew install homebrew/versions/swig304  
brew link homebrew/versions/swig304  

是会报错的
于是

brew install swig@3.04

接着跑

vim ~/.bash_profile
  export PATH=$PATH:/usr/local/opt/swig@3.04/bin
 source ~/.bash_profile

这里需要注意要新开终端来执行。

又出现了

    building 'M2Crypto.__m2crypto' extension
    swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
    swig -python -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I/usr/include -includeall -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
    SWIG/_m2crypto.i:31: Error: Unable to find 'openssl/opensslv.h'
    SWIG/_m2crypto.i:45: Error: Unable to find 'openssl/safestack.h'
    SWIG/_evp.i:12: Error: Unable to find 'openssl/opensslconf.h'
    SWIG/_ec.i:7: Error: Unable to find 'openssl/opensslconf.h'
    error: command 'swig' failed with exit status 1

找不到 openssl/opensslv.h

google
https://gist.github.com/charlax/38ecd925a8bcb8cadcf5

SWIG/_m2crypto.i:30: Error: Unable to find 'openssl/opensslv.h'

SWIG/_m2crypto.i:33: Error: Unable to find 'openssl/safestack.h'

SWIG/_evp.i:12: Error: Unable to find 'openssl/opensslconf.h'

SWIG/_ec.i:7: Error: Unable to find 'openssl/opensslconf.h'

error: command 'swig' failed with exit status 1

Solution:

$ brew install openssl
$ pip install --global-option=build_ext --global-option="-I/usr/local/opt/openssl/include" m2crypto

用brew 安装 openssl 指定路径

到此安装成功。