Include C++ DLL in WebGL Build

Hi,

I'm having trouble creating a WebGL Build that references a C++ DLL. It seems like it should be possible (http://forum.unity3d.com/threads/include-native-c-code-into-webgl-build-how.307262/), but I can't seem to do it without creating an error.

Here is MyMathFuncs.h (included in my C++ DLL)

Code (CSharp):

1. extern "C" __declspec(dllexport) double Add_Static(double a, double b) {
2.     return a + b;
3. }

Here is MoveBall.cs (added to a sphere GameObject in Unity)

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using System.Runtime.InteropServices;
4.  
5. public class MoveBall : MonoBehaviour {
6.     [DllImport("__Internal")]
7.     private static extern double Add_Static(double a, double b);
8.  
9.     void Update()
10.     {
11.         float addAmount = .01f;
12.         Vector3 pos = transform.position;
13.         pos.x = (float)Add_Static(pos.x, addAmount);
14.         transform.position = pos;
15.     }
16. }
17.  

When I try to run the output WebGL build I get the following errors in my Firefox console:

and then

Any ideas what I'm doing wrong? Is using a C++ DLL possible in a WebGL build?

I appreciate any help you can give me.
David

 

Hello, I have two questions about this topic:
1 now, it's 2021, it is still impossible to use C++ dll in a WebGL build?
2 if it is impossible, I need to build my C++ source in the format .a or .bc, then, I can use them in a WebGL build?

Thank you for your confirmation. Thank you very much.

 

Also curious about this now that it has been a few years.

Is it still the case that a C++ DLL cannot be put in to a WebGL project?

 

is it now possible somehow ?