How to call a function from a dll created with d ?

[Ruby The Roobster]

On Saturday, 2 July 2022 at 20:43:41 UTC, Vinod KC wrote:
> On Saturday, 2 July 2022 at 14:32:11 UTC, apz28 wrote:
>>
>> dmd -of=dimedll.dll dimedll.d dimedll.def
>> dmd dime.d dimedll.di
>
> Thanks for the reply. Well, I am sorry to say that your 
> suggestions resulted in failure.
> First of all, when I used this command -- ` dmd -of=dimedll.dll 
> dimedll.d dimedll.def` I got this error message-
> `Error: unrecognized file extension dll`.
> So I avoided the `-of=dimedll.dll` part.
> Then I compiled it with this command - `dmd -H dimedll.d 
> dimedll.def`
> And I got some warnings. Here are they.
> ```d
> dimedll.def(2) : warning LNK4017: EXETYPE statement not 
> supported for the target platform; ignored
> dimedll.def(3) : warning LNK4017: SUBSYSTEM statement not 
> supported for the target platform; ignored
> dimedll.def(4) : warning LNK4017: CODE statement not supported 
> for the target platform; ignored
> dimedll.def(4) : warning LNK4017: DATA statement not supported 
> for the target platform; ignored
>    Creating library dimedll.lib and object dimedll.exp
> ```
> I know all of them are from my `def` file. Anyways, I stepped 
> forward and tried to run the main file with this dll & lib.
> So I ran this command. - `dmd dime.d dimedll.di`. But I got 
> this error message.
> ```d
> dime.obj : error LNK2001: unresolved external symbol 
> __D7dimedll12__ModuleInfoZ
> dime.exe : fatal error LNK1120: 1 unresolved externals
> Error: linker exited with status 1120
> ```

First issue - you're using dmd on windows.  Dmd gives me errors 
about the ModuleInfo, while LDC doesn't. [This is the LDC 
download 
link.](https://github.com/ldc-developers/ldc/releases/download/v1.29.0/ldc2-1.29.0-windows-multilib.exe)  Next, change dimedll.d to the following:

```d
module dimedll;
export void testFunc()
{
     import std.stdio;
     writeln("Lets build our own ime.");
}
```

and dime.d to the following:

```d
import dimedll; //In case you ever write more functions for 
dimedll.d;

pragma(lib, "dimedll.lib");

void main()
{
     testFunc();
}
```

Then run ```ldc2 -shared dimedll.d``` and right after that 
```ldc2 dime.d```.  If I didn't make a mistake in writing this (I 
tested it on my own system), it should output a working program 
that prints the expected output when ran.