Dll import issue in native plugin

Hi everybody.

We are trying to implement out first native plugin for iOS.

What we wanto do is use a third party library (is a static library .a) to implement some logic layer over it. We put third-party library in to Assets/Plugins/iOS.

All compilation & build phases went fine but we're getting linkage into device. Static library are included into dependencies of the generated project.

DllNotFoundException: Unable to load DLL 'libThirdParty': The specified module could not be found.

We also try with ("ThirdParty", "libThirdParty", "libThirdParty.a")
[DllImport ("ThirdParty")]
private static extern void HelloWorldPluginFunction();

[DllImport ("libThirdParty")]
private static extern void HelloWorldPluginFunction();

[DllImport ("libThirdParty.a")]
private static extern void HelloWorldPluginFunction();

What we are forgetting / doing bad?. Anyone was found same problems.

Thanks in advanced,

 

Using [DllImport("__Internal")], XCode reports next link errors.

Undefined symbols for architecture arm64:

"_HelloWorldPluginFunction", referenced from:

_OurFirstPluginProxy_FaceMePluginFunction_m1 in Bulk_Assembly-CSharp-firstpass_0.o

(maybe you meant: _OurFirstPluginProxy_HelloWorldPluginFunction_m1_MethodInfo, _OurFirstPluginProxy_HelloWorldPluginFunction_m1 )

ld: symbol(s) not found for architecture arm64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

 

Thank you very much Alexey.

We are a bit step closer to the solution.

We have run into new difficulties. Internally our plugin uses an external framework. Simply deploy generate project we got:

"
dyld: Library not loaded: @rpath/FaceMe.framework/FaceMe

Referenced from: /private/var/mobile/Containers/Bundle/Application/98E85F0B-E7D9-4C66-A49E-996EDF311F47/ProductName.app/ProductName

Reason: image not found
"

Even so after

* Add framework reference.
* Add framework to embedded binaries setting.
* Add a extra copy build step to install frameworks in Frameworks
* Set '@executable_path/Frameworks' to Runpath search Paths

Same result! :-(.


Is it possible to create a native plugin that use external framework?.

Thank in advanced

 

OH!!!! It's alive!

Very thx povilas.

 

I understand this is an old thread, but this is the only place I've seen any hope for a week now as I'm getting the exact kind of error as op

I'm getting this error in Xcode

Code (CSharp):

1. Undefined symbols for architecture arm64:
2.   "__unityTapticIsSupport", referenced from:
3.       _TapticManager_IsSupport_mADBE6C1751030925D79B930DDB17B1D746603C29 in Assembly-CSharp5.o
4.       _TapticManager__unityTapticIsSupport_mD9FBB8237C589E9CA90CE31B718C8D8859237DCB in Assembly-CSharp5.o
5.      (maybe you meant: _TapticManager__unityTapticIsSupport_mD9FBB8237C589E9CA90CE31B718C8D8859237DCB)
6.   "__unityTapticImpact", referenced from:
7.       _TapticManager_Impact_m756F7B9F2CEEEF90D0A9EA7EDABAE56E6EA18F2C in Assembly-CSharp5.o
8.       _TapticManager__unityTapticImpact_m4F8AA189DEFAB5590E8A08680DB6FE07C6682FB3 in Assembly-CSharp5.o
9.      (maybe you meant: _TapticManager__unityTapticImpact_m4F8AA189DEFAB5590E8A08680DB6FE07C6682FB3)
10.   "__unityTapticSelection", referenced from:
11.       _TapticManager_Selection_m52193285DA40B5A88C065CA88214F3FE524F8AA6 in Assembly-CSharp5.o
12.       _TapticManager__unityTapticSelection_m06C11D6513340D0518D65E8C065777895D1D4CC1 in Assembly-CSharp5.o
13.      (maybe you meant: _TapticManager__unityTapticSelection_m06C11D6513340D0518D65E8C065777895D1D4CC1)
14.   "__unityTapticNotification", referenced from:
15.       _TapticManager_Notification_mAC7242D4C817986B9B2943B730CA4166CFA23969 in Assembly-CSharp5.o
16.       _TapticManager__unityTapticNotification_m3B907AA8EB1DB3F0EDE84D1130A56E04B9F37109 in Assembly-CSharp5.o
17.      (maybe you meant: _TapticManager__unityTapticNotification_m3B907AA8EB1DB3F0EDE84D1130A56E04B9F37109)
18. ld: symbol(s) not found for architecture arm64
19. clang: error: linker command failed with exit code 1 (use -v to see invocation)

I believe this is the code in question

Code (CSharp):

1. using System.Runtime.InteropServices;
2.  
3. namespace TapticPlugin
4. {
5.     public enum NotificationFeedback
6.     {
7.         Success,
8.         Warning,
9.         Error
10.     }
11.  
12.     public enum ImpactFeedback
13.     {
14.         Light,
15.         Medium,
16.         Heavy
17.     }
18.  
19.     public static class TapticManager
20.     {
21.  
22.         public static void Notification(NotificationFeedback feedback)
23.         {
24.             _unityTapticNotification((int)feedback);
25.         }
26.  
27.         public static void Impact(ImpactFeedback feedback)
28.         {
29.             _unityTapticImpact((int)feedback);
30.         }
31.  
32.         public static void Selection()
33.         {
34.             _unityTapticSelection();
35.         }
36.  
37.         public static bool IsSupport()
38.         {
39.             return _unityTapticIsSupport();
40.         }
41.  
42.         #region DllImport
43.  
44. #if UNITY_IPHONE && !UNITY_EDITOR
45.         [DllImport("__Internal")]
46.         private static extern void _unityTapticNotification(int type);
47.         [DllImport("__Internal")]
48.         private static extern void _unityTapticSelection();
49.         [DllImport("__Internal")]
50.         private static extern void _unityTapticImpact(int style);
51.         [DllImport("__Internal")]
52.         private static extern bool _unityTapticIsSupport();
53. #else
54.         private static void _unityTapticNotification(int type) { }
55.  
56.         private static void _unityTapticSelection() { }
57.  
58.         private static void _unityTapticImpact(int style) { }
59.  
60.         private static bool _unityTapticIsSupport() { return false; }
61. #endif
62.  
63.         #endregion // DllImport
64.     }
65.  
66. }

How would I get this to stop throwing that error?

 

There was a recent(?) change in unity where you now need to make sure the files get linked to the framework, rather than the app in xcode.