在linux下编译nodejs 的C++ addon ，在windows下都是OK的，结果到了ubuntu下反而报错了，错误大概如下：

gyp ERR! Completion callback never invoked

搞了很久，各种搜索都找不到方法，后边进github里面看了下readme,尝试把npm 和node-pyg的pyhon路径设置了一下就可以了。

Configuring Python Dependency配置依赖

If you have multiple Python versions installed, you can identify which Python version node-gyp uses by setting the --pythonvariable:

$ node-gyp --python /user/bin/python2.7

If node-gyp is called by way of npm, and you have multiple versions of Python installed, then you can set npm‘s ‘python’ config key to the appropriate value:

$ npm config set python /user/bin/python2.7