Unmangling C++ DLL Function Names [duplicate]

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Possible Duplicate:

How do I stop name-mangling of my DLL's exported function?

I have a DLL that is written in C++. The exported function names need to be unmangled. For example, int MyFunc( int Param1, int Param2 ); needs to appear to an outside application trying to call the library function simply as MyFunc. However, when I look at it using Dependency Walker, it looks like _MyFunc@8. This is how I have it declared in C++:

e开发者_StackOverflow社区xtern "C" __declspec(dllexport) int WINAPI MyFunc( int Param1, int Param2 );

I thought the extern "C" would do the trick. How do I get rid of the mangling? Thanks.

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Ways to get rid of mangling: (assuming MSVC is the build environment)

Export via a .DEF file.

Export as extern "C" ensuring that the __cdecl calling convention is used. __stdcall prepends the _ and postpends the @ on dll exported functions even when extern "C" is used.

extern "C" __declspec(dllexport) int __cdecl MyFunc(int Param1, int Param2);

Export using a #pragma directive. You need to pass the fully mangled name on the other side of this. __FUNCDNAME__ is a useful directive to put in a macro in a function to list its decorated name,

#pragma comment(linker, "/EXPORT:MyFunc=_MyFunc@8");

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The leading underscore and @8 suffix are not from C++ name mangling, but rather denote stdcall calling convention, as is normal for dllexport.

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This is probably because you did not put extern "C" declspec on the function definition, you only put it on the declaration.

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On the header (.h), define it as:

extern "C" 
{
  __declspec(dllexport) int __stdcall MyFunc( int Param1, int Param2 );
}

Then, on the implementation (.cpp) of the function:

extern "C"
{
  __declspec(dllexport) int __stdcall MyFunc( int Param1, int Param2 )
  {
     // ... code ...
  }
}

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On Gnu systems there is c++filt