Unity Cloud Build Failing with a Blank Project: Troubleshooting AdColony Integration Issues

As Unity developers, we've all been there - struggling to resolve issues that prevent our projects from building successfully on various platforms. In this article, we'll explore a common problem encountered when integrating AdColony into our Unity project and publishing it to the cloud build service. Specifically, we'll examine the error 'Undefined symbols for architecture arm64' and provide solutions to get your project up and running.

The Problem: Undefined Symbols for Architecture arm64

When attempting to build an iOS version of your Unity project, you may encounter an error message that reads:

`_OBJC_CLASS_$_AdColony`, referenced from:

Undefined symbols for architecture arm64:

Ld: warning: arm64 function not 4-byte aligned: _unwind_tester from PATH_TO_IOS_BUILD/Libraries/libiPhone-lib.a(unwind_test_arm64.o)

Here's the error I get: ld: warning: arm64 function not 4-byte aligned: ltmp0 from PATH_TO_IOS_BUILD/Libraries/libiPhone-lib.a(unwind_test_arm64.o)

This error is quite cryptic, but it essentially indicates that there's a problem with linking AdColony libraries to your project.

Troubleshooting the Issue

To resolve this issue, you'll need to ensure that all necessary frameworks and libraries are correctly linked to your project. Here are some steps to follow:

1. Verify Framework Dependencies: In Xcode, go to your target's General settings and scroll down to the Embedded Binaries section. Make sure AdColony is listed there.

2. Check iOS Adapters for AdColony: Visit the Firebase AdMob/ios/mediation-networks page and download the iOS adapters for AdColony, Chartboost, and Unity Ads. Add them to your project's Plugins/iOS directory.

3. Manually Add Libraries (Optional): If you're still experiencing issues, try manually adding AdColony libraries to your Xcode build.

After implementing these steps, you should be able to successfully build your iOS project for AdColony integration.

In this article, we've explored a common issue encountered when integrating AdColony into Unity projects and publishing them to the cloud build service. By following the troubleshooting steps outlined above, you should be able to resolve the 'Undefined symbols for architecture arm64' error and successfully integrate AdColony into your project.

Unity cloud build failing with a blank project