for example:use vc compile on x86
func.c:
__declspec(dllexport) int _stdcall sub(int a,int b)
{
	return a-b;
}

func.def:

LIBRARY
EXPORTS
sub

-----------------
i use "implib.exe" to create a omf format lib.
----------------
D code:
import std.exception;

//this is a cdecl call
extern(C) int sub(int a,int b);

void main()
{
    auto c1 = sub(2,1);

    //when this line run,the c1 value is broken
    auto c2 = enforceEx!Exception(sub(1,2));
}
------------------
my question is how write D code to call the c function

try extern(Windows) isntead of extern(C).

On Tuesday, 24 March 2015 at 15:26:22 UTC, Adam D. Ruppe wrote:
> try extern(Windows) isntead of extern(C).

use extern(Windows) or extern(System)

the compile show the link error:
Error 42: Symbol Undefined _sub@8

----------------
dll export func name is "sub",
and the dll is 3rd party,i can't change the dll code.

i use "implib.exe /system func.lib func.dll" to create a func.lib.

how can i link correctly?

On Wednesday, 25 March 2015 at 00:09:33 UTC, mzfhhhh wrote:
> i use "implib.exe /system func.lib func.dll" to create a func.lib.

You might also need to specify the .def file as the final argument to that.

http://digitalmars.com/ctg/implib.html

The def file can list aliases for the functions. Maybe try it without the /system flag too. I know there's a way but I don't know exactly what, I just tend to guess and check a little...

On Wednesday, 25 March 2015 at 00:26:21 UTC, Adam D. Ruppe wrote:
> On Wednesday, 25 March 2015 at 00:09:33 UTC, mzfhhhh wrote:
>> i use "implib.exe /system func.lib func.dll" to create a func.lib.
>
> You might also need to specify the .def file as the final argument to that.
>
> http://digitalmars.com/ctg/implib.html
>
> The def file can list aliases for the functions. Maybe try it without the /system flag too. I know there's a way but I don't know exactly what, I just tend to guess and check a little...

1.def file:
  LIBRARY "func"

  EXPORTS
  _sub@8 = sub

2.create lib
  implib.exe func.lib func.def

-------------------------
now it works fine,thanks!