I appreciated Henry's comment regarding my last question (generating a
.lib file from a FPC-generated for linking with VC++). I ended up
using implib (http://implib.sourceforge.net) to generate the .def file
with dll2def.exe and then fasm.exe to create the .lib file from that,
and VC++ seems to link fine against it.
My fight is with calling conventions and exported names. I've read the
programmers guide chapters 6, 7, and 12, and got a lot of useful
information out if it. I'm trying now to get a grasp of how different
calling conventions work, what different compilers generate what name
decorations with the different calling conventions, what compilers
require when linking against them, etc.
I've got a little test library with two functions:
function stdcallSquare(value : cint) : cint; stdcall;
function cdeclSquare(value : cint) : cint; cdecl;
And I'm trying to use them in a Visual C++ project. In my .cpp file, I have:
extern "C" {
int __declspec(dllimport) __cdecl cdeclSquare(int value);
int __declspec(dllimport) __stdcall stdcallSquare(int value);
}
In the "exports" section of my FPC library, I can simply export
cdeclSquare without modifying the name it's exported as, and VC++
finds and links against and calls it just great.
If I try to export sdtcallSquare without modifying the name it's
exported as, VC++ complains with "1>testdll.obj : error LNK2019:
unresolved external symbol __imp__stdcallsqu...@4 referenced in
function _wmain".
If I put "stdcallSquare name 'stdcallsqu...@4'" in my exports section,
then VC++ seems to be happy with it and it links and calls the routine
Ok.
So my question is, is there a way to have FPC automatically generate
the decoration VC++ is looking for? Or does anyone know of a way to
make VC++ find and link stdcall functions without the decorations?
I know I could just use cdecl and forget about stdcall altogether, but
I'd like to learn how to do it with stdcall but I'm just curious to
see if there's a way to get stdcall to work without having to manually
put the decorations on the exported names myself.
Thanks,
-SG
--
This email is fiction. Any resemblance to actual events
or persons living or dead is purely coincidental.
Seth Grover
sethdgrover[at]gmail[dot]com
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