Linux : Unity DllImport (“filename”) not working

Question

I have imported "Kinect with OpenNI2"( https://www.assetstore.unity3d.com/en/#!/content/10693) from Unity Asset store. When I run the code , I get below error message

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System.DllNotFoundException: UnityInterface2

at (wrapper managed-to-native) KinectWrapper:Init (bool,bool,bool) at KinectManager.Start () [0x00000] in /home/ashok/New Unity Project/Assets/KinectScripts/KinectManager.cs:657

UnityEngine.Debug:LogError(Object) KinectManager:Start() (at Assets/KinectScripts/KinectManager.cs:808)

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The error message is generated when below code is executed

[DllImport("UnityInterface2", SetLastError=true)]

public static extern int Init(bool isInitDepthStream, bool isInitColorStream, bool isInitInfraredStream);

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I have found below things

[DllImport("UnityInterface2", SetLastError=true)] ------- not working

[DllImport("UnityInterface2.dll", SetLastError=true)] ------- not working

[DllImport("UnityInterface2.dylib", SetLastError=true)] ------- not working

[DllImport("UnityInterface2.so", SetLastError=true)] ------- working but do not want to use it ( unreferenced symbols as I am unable to compile the .cpp and .h files properly from https://github.com/rfilkov/OpenNi2UnityInterface to generate .so file)

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UnityInterface2.dll and UnityInterface2.dylib are proper compiled files, but unable to use

Aim : To do gesture recognition (hand tracking) on Linux

Hardware : Kinect xbox360

Softwares : Linux,OpenNI2, NiTE2

Unity Package used : Kinect with OpenNI2 (https://www.assetstore.unity3d.com/en/#!/content/10693)

**Existing things about the package (code ):**Its meant for windows OS and Osx (Apple) (Package contains UnityInterface2.dll (Windows) and libUnityInterface2.dylib(OsX)) (Package does not contain UnityInterface2.so (Linux))

Existing Platform dependency code : .....Platform Independent C# code (specifying location of OpenNI2/NiTE2 installation directories(OsX/Linux)..............

If(OS == WIndows OS ) use UnityInterface2.dll library [DllImport("UnityInterface2.dll")] ;

else if (OS == OsX ) use libUnityInterface2.dylib library; [DllImport("libUnityInterface2.dylib")] ;

......... Platform Independent C# code (calling functions in library ) ..............

Requirement : To modify the code to make it work with Linux in following ways

1. Use the existing library files (.dll and .dylib ) and call its functions, ie

If( OS == Linux ) use UnityInterface2.dll library; [DllImport("UnityInterface2.dll")]---- (NOT WORKING))

OR

If( OS == Linux ) use libUnityInterface2.dylib Library [DllImport("libUnityInterface2.dylib")](NOT WORKING))

2. Create a .so file (UnityInterface2.so) by compiling the .h and .cpp files in https://github.com/rfilkov/OpenNi2UnityInterface location and use the following code

If( OS == Linux ) use libUnityInterface2.so Library [DllImport("libUnityInterface2.so")]

Result : unreferenced symbols as I am unable to compile the .cpp and .h files properly

Basically Trying to use 1st option, ie to make Linux identify .dll or .dylib files)