https://code.google.com/p/go/source/browse/misc/cgo/gmp/gmp.go?r=release
https://github.com/golang/go/wiki/GoForCPPProgrammers
http://zacg.github.io/blog/2013/06/06/calling-c-plus-plus-code-from-go-with-swig/
http://stackoverflow.com/questions/1713214/how-to-use-c-in-go
http://golang.org/misc/swig/callback/callback.cc （Swig director）
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`单行代码`
https://code.google.com/p/go/source/browse/misc/cgo/gmp/gmp.go?r=release
https://github.com/golang/go/wiki/GoForCPPProgrammers
http://zacg.github.io/blog/2013/06/06/calling-c-plus-plus-code-from-go-with-swig/
http://stackoverflow.com/questions/1713214/how-to-use-c-in-go
http://golang.org/misc/swig/callback/callback.cc （Swig director）