Flutter Unity iOS build failing

[jrussell111]

If you are looking for help, please confirm the following...

• I confirm I have searched the Docs, Codemagic Sample Projects, and GitHub Discussions.
• I confirm the software versions on my local computer match the ones in CI environment (e.g. Xcode version, Gradle version). See here
• I confirm I am able to do a fresh clone of the repository and build the project on my local computer.

Which mobile framework are you using?

Flutter (Dart)

Steps to reproduce

I've been trying to build Flutter with the Unity widget and have successfully built it on a local machine but when using codemagic it encounters an error. There's no iOS guide for this but I've followed the Android Flutter/Unity and the iOS Unity guides to create my yaml. Every step goes fine up until the "flutter build ipa" command step which gives the error posted in actual results.

My yaml uses mac_pro with the latest supported xcode 14.2 which I believe is required for Unity builds atm. I can post it in full if required and have provided my build ID. The only references I've found to the error is an old Unity forum post using a 2021 alpha build that was supposedly going to be fixed. It doesn't seem to be the same issue as they mentioned filepath spaces being the cause.

Expected results

Build successfully

Actual results

Running pod install... 23.0s
Running Xcode build...
Xcode archive done. 61.3s
Failed to build iOS app
Lexical or Preprocessor Issue (Xcode): 'pch-cpp.hpp' file not found
/Users/builder/clone/flutter_client/ios/UnityLibrary/Classes/Native/mscorlib__9.cpp:0:12

Encountered error while archiving for device.

Build failed :|
Step 11 script Flutter build ipa exited with status code 1

Build id (optional)

646a8c201b52313a134469b0

[icarusdust]

Hi @jrussell111, first and foremost, I see that your team is on a paid plan which means that you have access to the private support channel through the chat widget in the UI, please contact our team through that widget next time for quicker responses.
As for the error, it is quite vague and need to check few things. I see that you are downloading 2021.3.23f1 with your CM build, is it what you are using locally ? I also found this thread,.

[jrussell111]

Yes I was using the same Unity version. That thread link suggested a newer Unity version fixed the issue but trying to use the 2022 unity version on the intel mac gave an unsupported error with codemagic. We've decided to explore alternatives to integrating Unity into Flutter as this hasn't been the only issue, thank you for your help.

[icarusdust]

What exact 2022 version are you trying to install ? Currently, we have 2022.2.16f1 in the pool and we can add the version you are using to the pool if you can share it.

[icarusdust]

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