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Bug errors il2cpp android and pc

Discussion in 'Editor & General Support' started by tdat73, Nov 11, 2023.

  1. tdat73

    tdat73

    Joined:
    Jun 23, 2023
    Posts:
    1
    I have this error and don't know how to fix it, please help me upload_2023-11-11_10-12-43.png
     
  2. Kurt-Dekker

    Kurt-Dekker

    Joined:
    Mar 16, 2013
    Posts:
    39,571
    How to troubleshoot build failures:

    First, make a blank project with a single blank scene and prove that it builds successfully.

    If the blank project does NOT build, go fix your Unity installation or your other tools, such as Android SDK, NDK, JDK, etc. It may even be necessary to change to a different version of Unity3D. It is generally best to stay with LTS versions of Unity3D.

    Until you can build a blank project to the target platform, don't fiddle with anything else.

    Once you can build a blank project, now bisect the problem by bringing over parts of your current project and building it one subsystem at a time, perhaps stubbing things out that might trigger compiler errors.

    Most often things that prevent building are third-party libraries such as Firebase.

    Once you identify the subsystem, go to the documentation for it and make sure you are doing it correctly.

    It may also be helpful to work through a tutorial or two for whatever subsystem is making the build fail.

    Android build not building:

    Recently (circa July 2022) there have been reports of Unity's installer failing to install the Android Tools.

    https://forum.unity.com/threads/cant-build-for-android.1306098/

    Here was how I brought up Unity2020.3.41 and the Android SDK 31 on October 30, 2022 (edited on August 23, 2023 to include Android SDK 33...):

    https://forum.unity.com/threads/aab...y-2021-3-8-with-jdk-1-8.1322211/#post-8551193

    Android Gradle errors and other related stuff:

    https://forum.unity.com/threads/unity-gradle-bug-please-help.1368018/#post-8625789
     
  3. JoshPeterson

    JoshPeterson

    Unity Technologies

    Joined:
    Jul 21, 2014
    Posts:
    6,938
    This failure occurs because the code in the project has extern methods in C#. Methods marked as extern with a the [Dllimport("__Internal")] attribute must be present in a native library that is linked with the Unity player when building with the IL2CPP scripting backend.

    For example, this in this project one function which causes this issue is named: SMSsend

    You have two options:
    1. Build a native library with all of the methods marked as extern with the [Dllimport("__Internal")] attribute for the target platform and architecture of the player. See this documentation for details about native plugins: https://docs.unity3d.com/Manual/NativePlugins.html
    2. Remove the C# code which defines this extern method. You can do that with platform dependent compilation: https://docs.unity3d.com/Manual/PlatformDependentCompilation.html