CODEWITHSUNDEEP
c++macosunity-game-engine
Abhilash Ranjan
Abhilash Ranjan

Reputation: 11

DllNotFoundException while using unity native c++ Plugins

Getting DllNotFoundException when trying to build a native c++ plugin for Unity.

FirstDll.cpp

#include "FirstDll.h"                                                                                                                                                                

  DLLExport int add(int a, int b){
      return a+b;
  }

  FirstDll::FirstDll(){
  }

   FirstDll::~FirstDll(){
 }

FirstDll.h

#define DLLExport __declspec(dllexport)                                                                                                                                              

   extern "C"{
       DLLExport int add(int a, int b);
   }

  class FirstDll{
  public:
       FirstDll();
      ~FirstDll();
 };

I am then generating a so file via this command

g++ -dynamiclib -flat_namespace -fms-extensions FirstDll.cpp -o libmyclass.so

I am then added this .so file in Assets/Plugins/x86_64 folder and in my unity c# code, I am trying to run this piece of code.

[DllImport("myclass")]
    static extern int add(int a, int b);

After getting this error, I have tried to moved the so file to different locations and test. I am always getting DllNotFoundException.

Upvotes: 1

Views: 1593

Answers (1)

Bogdan Veliscu
Bogdan Veliscu

Reputation: 681

Try using the following clang command instead

clang *.cpp -O3 -dynamiclib -arch i386 -arch x86_64 -o libmyclass.bundle

Then make sure to select the correct platform in Unity platform selection

Or you can check this simple plugin from Unity: SimplestPluginExample

Upvotes: 1

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