Intel Fortran Call vc dynamic library

[ollehyas]

I build dynamic library with vs2008 like this

extern "C" _declspec(dllexport) void _stdcall ADD_d(int*,int*);
void _stdcall ADD_d(int*A,int*B)
{
B=A+10;
}

then call this function in the fortran like this

!DEC$ ATTRIBUTES DLLIMPORT :: ADD

integer A,B

A=10
call ADD_d(A,B)

but linked using intel fortran, error occur ike this

_ADD_D cannot resovled

can anyone tell me how to fix the problem?

[DavidWhite]

I suggest you look at the mixed language section of the documentation - you probably need to use STDCALL in the Fortran DLL declarations. Also, you need to look at what symbols the DLL is exporting (suggest you use dependency walker from dependencywalker.com). You may need an Alias to correctly decorate the name expected by Fortran - both case and the underscores are significant.

David

[ollehyas]

anyone can give me more obvious answer?

[DavidWhite]

Check this thread in the forum http://software.intel.com/en-us/forums/showthread.php?t=61587&o=a&s=lr

[IanH]

Follow David's advice and (read the documentation then) add the STDCALL and ALIAS attributes (and fix the subroutine name typo?). To do this you'll also need an interface block.

[fortran]INTERFACE
  SUBROUTINE ADD_d(a, b)
  ! Be mindful of line length in fixed form
  !DEC$ ATTRIBUTES DLLIMPORT, STDCALL, DECORATE, ALIAS:'ADD_d' :: ADD_d
    IMPLICIT NONE
    INTEGER :: a, b
  END SUBROUTINE ADD_d
END INTERFACE
[/fortran]

Is there a reason that you are using STDCALL? If not, then consider using the Fortran 2003 C interoperability feature of Intel Fortran.

[Arjen_Markus]

The actual routine is called ADD_d, but your dllimport statement refers to ADD.

Regards,

Arjen