Coffee.UIEffect.R.dll is causing build error on IOS

[EricHu33]

Describe the bug
Coffee.UIEffect.R.dll is causing build error on IOS, when the code stripping level is set to Low (set to minimal won't produce error)

To Reproduce
Steps to reproduce the behavior:

1. swtich build platform to IOS
2. with URP 14 installed (will install burst compiler)
3. enable code stripping and make code strip level to "Low"
4. build -> error

You can reproduce this on a empty project as well.

Expected behavior
Build success

Environment (please complete the following information):

• Version 5.3.0 (or any version that contains this DLL)
• Platform: IOS
• Unity version: Unity 2022.3.10f1
• Build options: IL2CPP, code stripping level : Low, burst compiler enabled

Additional context
If you disable burst compiler (disable it via BurstCompiler AOT setting inside project setting), this issue will not occur as well.
I tried to add Coffee.UIEffect.R into link.xml to prevent it from stripping. but with burst compiler enable it will still resulting error when build.

Earlier version (pre-2024 Dec) won't have this issue because there's no such DLL exist.

[mob-sakai]

Thank you for your reporting!

[mob-sakai]

The issue is not reproduced on my environment...

• Version 5.5.1
• Platform: IOS
• Unity version: Unity 2022.3.32f1
• Build options: IL2CPP, code stripping level : Low, burst compiler (1.8.18) enabled

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Could you please attach a minimal project (included Assets, Packages and ProjectSettings directories) that reproduces the issue?
Of course, you don't need to include any secret assets from your project. Feel free to use free assets instead.

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Coffee.UIEffect.R.dll is causing build error on IOS, when the code stripping level is set to Low

Is there any error message related to this?
Also, could you let me know the version of the Burst package you are using?

[EricHu33]

Hello here's the error screenshot and message, I also attached the required files to reproduce the error

Library/Bee/artifacts/iOS/AsyncPluginsFromLinker: Failed to find entry-points:
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:190)

Building Library/Bee/artifacts/iOS/AsyncPluginsFromLinker failed with output:
UnityEditor.Build.BuildFailedException: Burst compiler (1.8.19) failed running

stdout:
Overriding backend due to platform constraints : 'burst-llvm-10'
Error: Failed to find entry-points:
System.Exception: Error while loading assembly references for Coffee.UIEffect.R -

We are using 2022.3.10f1, please try to use this version to reproduce it.
I'm able to reprdouce it in both our internal cloud build as well as a empty project that install UIEffect.
I'm able to make it build successfully by removing the DLL, is the DLL required for the package?
Since we can't upgrade the Unity version easily.

ReproduceFiles.zip

additional info :
Reproduciable on build target Mac/Ios. not happen on Android build target.

[mob-sakai]

Thank you 👍

[mob-sakai]

🎉 This issue has been resolved in version 5.5.3 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[EricHu33]

hello, thanks for the quick update, can you share the reason of the error?

[mob-sakai]

In older versions of IL2CPP, DLLs without an entry point were not supported.
To work around this build error, I added a dummy entry point (an internal interface) to Coffee.UIEffect.R.dll, which has no side effects.