Packaging to iOS hangs indefinitely

[j9liu]

Copying this over from a forum thread: https://community.cesium.com/t/building-cesium-unreal-for-visionos/37266/4

I haven't been able to triage this, but I'm opening this issue to track it.

In this instance, I am doing the following:

Unreal 5.5.1 from Epic Launcher on M3 MacBook Air
Creating a VRTemplate project
Testing that this builds fine to iOS (it does and took less than 5 mins)
Adding CesiumForUnreal 2.11.0 release from github
Regenerate project files and compile through Xcode
Ensure CesiumForUnreal is enabled
Build to iOS
Currently the build to iOS with CesiumForUnreal enabled appears to be hanging compiling vecmath.cpp (1hr + and counting). I’ll be patient and leave this overnight however I wouldn’t have thought that this library would have caused such a long compilation time or be hanging?

UATHelper: Packaging (IOS): [182/188] Compile [arm64] VecMath.cpp

Unfortunately, according to the user the process was stuck even after 12 hours.