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iOS __RouteForRecording symbol not found for arm64

Discussion in 'Editor & General Support' started by Rarceth, Feb 11, 2021.

  1. Rarceth

    Rarceth

    Joined:
    Oct 15, 2015
    Posts:
    41
    I am developing a project on multiple platforms. For the mobile version, the Android build is working perfectly. However, I've ported the changes over to iOS for the first time in a while, and Im getting errors.

    The initial build works fine, and generates the xcode project properly. However, when building the release version to device, I'm getting this:

    --------------------------------------------------------------------------------------

    Undefined symbols for architecture arm64:
    "__RouteForRecording", referenced from:
    _iOSSpeaker__RouteForRecording_mE15183F08BA3C79106BDEF319CDDE823809572FE in Assembly-CSharp13.o
    _iOSSpeaker_RouteForRecording_mD05B56B8184C49C704CAD499A64B3C551AE7753E in Assembly-CSharp13.o
    (maybe you meant: _iOSSpeaker__RouteForRecording_mE15183F08BA3C79106BDEF319CDDE823809572FE)
    "__RouteForPlayback", referenced from:
    _iOSSpeaker__RouteForPlayback_m09DA6A97618A4F2EBE79832DC34D80632B70C6CD in Assembly-CSharp13.o
    _iOSSpeaker_RouteForPlayback_mF0BBF6985F12E6DD846397D8D889C4AF6970DF32 in Assembly-CSharp13.o
    (maybe you meant: _iOSSpeaker__RouteForPlayback_m09DA6A97618A4F2EBE79832DC34D80632B70C6CD)
    ld: symbol(s) not found for architecture arm64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)[/code]

    --------------------------------------------------------------------------------------

    Anyone seen this before? I cant find anything on google at all.

    Thanks,
    Pete
     
    Rarceth, Feb 11, 2021
    #1

  2. Kurt-Dekker

    Kurt-Dekker

    Joined:
    Mar 16, 2013
    Posts:
    36,749
    Maybe try deleting the IL2CPP cache... it's a folder called 
    il2cpp_cache
    inside the Library folder for your project, the one at the same depth as Assets and ProjectSettings. I would close Unity first, then retry after deleting.
     
    Kurt-Dekker, Feb 11, 2021
    #2

  3. Rarceth

    Rarceth

    Joined:
    Oct 15, 2015
    Posts:
    41
    Thanks for the advice! I'll give it a go if my current build doesnt pan out (I restricted it to arm64 only, removing arm7).
    Unfortunately, 4 hours a build so theres a bit of a turnover
     
    Rarceth, Feb 11, 2021
    #3

  4. JoshPeterson

    JoshPeterson

    Unity Technologies

    Joined:
    Jul 21, 2014
    Posts:
    6,773
    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: RouteForRecording

    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
     
    JoshPeterson, Feb 11, 2021
    #4
    Kurt-Dekker likes this.

  5. Rarceth

    Rarceth

    Joined:
    Oct 15, 2015
    Posts:
    41
    @JoshPeterson This did it! Turns out it was a known issue on our side that two of our third party assets didnt work with iOS, but no one knew why. You solved *all* the riddles haha. Thanks :)
     
    Rarceth, Feb 12, 2021
    #5
    JoshPeterson likes this.