在VC++6.0中编译MPI程序，而头文件mpicxx.h里函数出错，请问为什么？

[snihcyb]

MPI程序在VC++6.0 下编译，一编译就出现许多错误，都是在文件mpicxx.h里的，如：e:\program files\microsoft visual studio\vc98\include\mpicxx.h(1385) : error C2555: 'MPI::Nullcomm::Clone' : overriding virtual function differs from 'MPI::Comm::Clone' only by return type or calling convention
挑了一个mpicxx.h中报错的地方,如下：
// If the compiler does not support variable return types, return a
// reference to Comm. The user must then cast this to the correct type
// (Standard-conforming C++ compilers support variable return types)
#ifdef HAVE_NO_VARIABLE_RETURN_TYPE_SUPPORT
virtual Comm & Clone(void) const {
MPI_Comm ncomm;
MPI_Comm_dup( (MPI_Comm)the_real_comm, &ncomm);
Comm *clone = new Graphcomm(ncomm);
return *clone;
};
#else
virtual Graphcomm & Clone(void) const {
MPI_Comm ncomm;
MPI_Comm_dup( (MPI_Comm)the_real_comm, &ncomm);
Graphcomm *clone = new Graphcomm(ncomm);
return *clone;
};
#endif
};
请问是不是我的编译器不支持？

[macrojj]

// If the compiler does not support variable return types, return a
// reference to Comm. The user must then cast this to the correct type

这都告诉你了

不要返回引用。

把&去掉试试

[snihcyb]

自己找到答案了，在#include "mpi.h"前加入一句 #define MPICH_SKIP_MPICXX就可以了！

[snihcyb]

谢谢2楼的回复！

[huyonghuyong]

感谢咯，得救了……