CGO生成的头文件，_Fcomplex、_Dcomplex未定义的解决办法

#ifdef _MSC_VER
#  if _MSVC_LANG <= 201402L
#    include <complex.h>
     typedef _Fcomplex GoComplex64;
     typedef _Dcomplex GoComplex128;
#  else
#    include <complex>
     typedef std::complex<float> GoComplex64;
     typedef std::complex<double> GoComplex128;
#  endif
#else
  typedef float _Complex GoComplex64;
  typedef double _Complex GoComplex128;
#endif