Troubleshooting neverending il2cpp builds

We are trying to build our application for the UWP. There are a huge amount of missing and incompatible bits of API with the .Net Standard/mono system, so we are looking to use il2cpp

The issue is the build does not complete, even after 12+ hours.

Are there any tips or directions we can move to start to resolve these build issues?

 

I've tried 2017.3.1f1,2017.3.1p1 and 2018.1.0b7

 

I'm a bit hesitant to upload our entire codebase to Unity, I guess I will play around and see if we can find some kind of repro case but that could be really hard to track down

 

previously reported this issue,
https://forum.unity.com/threads/il2cpp-building-errors-on-unity-5-4-0f3.423577/#post-2947886

but it was closed as by design..
https://issuetracker.unity3d.com/is...f-specific-project-takes-3-5x-longer-to-build

tested the same project in 2017.2.1p3, still takes pretty long time compared to mono..

*the project was simply this plugin, try compile to android with il2cpp: https://www.assetstore.unity3d.com/en/#!/content/645

so i'd guess its some dll plugin in the project..

 

This is a separate issue - the build literally never completes.

I managed to get a repro case. It is the Leap Motion plugin, please check bug 1004743

in 2018.1 this causes il2cpp builds to fail on windows standalone so it is a pain there too. I have got in touch with the leap motion team about this issue too.