Trying to create a spec file for a WINE wrapper for a Windows 64-bit DLL.

In a 32-bit equivalent project the spec file might have contained something like this:

@ stdcall foo (long ptr) Proxyfoo

In the above example, the functype is stdcall and the WineLib User Guide suggests that all possible values of functype are as follows:-

FUNCTYPE should be one of:

1. pascal – for a Win16 function
2. stdcall – for a normal Win32 function
3. cdecl – for a Win32 function using the C calling convention
4. varargs – for a Win32 function taking a variable number of arguments
5. thiscall – for a Win32 function using the C++ calling convention

So what value should be used for a 64-bit function? Or can it just be omitted? The user guide does not suggest it is an optional item.