This has the same root cause as #101 so I'll close as a dupe .

As a workaround you'll need to add the additional preprocessor symbols / macros PB_FIELD_32BIT=1 and PB_NO_PACKED_STRUCTS=1 to your Xcode project from an editor plugin for Unity Cloud Build using the XcodeApi. You can see an example here https://github.com/googlesamples/unity-jar-resolver/blob/master/source/IOSResolver/src/IOSResolver.cs#L1236 as part of an asset preprocessor you'll need to add the flags PB_FIELD_32BIT=1 and PB_NO_PACKED_STRUCTS=1 to OTHER_CFLAGS.

Thanks for your answer and for clarifying!

Not sure I completely understand though, I´m not really familiar with xcode or how it works.
Would I do something like this then?

[PostProcessBuild]
public static void OnPostProcessBuild(BuildTarget buildTarget, string path) {
	if (buildTarget == BuildTarget.iOS) {
		string projPath = path   "/Unity-iPhone.xcodeproj/project.pbxproj";

		PBXProject proj = new PBXProject();
		proj.ReadFromString(File.ReadAllText(projPath));
		string target = proj.TargetGuidByName("Unity-iPhone");

		proj.AddBuildProperty(target, "OTHER_CFLAGS", "$(inherited)");
		proj.AddBuildProperty(target, "PB_FIELD_32BIT", "1");
		proj.AddBuildProperty(target, "PB_NO_PACKED_STRUCTS", "1");

		File.WriteAllText(projPath, proj.WriteToString());
	}
}

Or you said "add the flags to OTHER_CFLAGS", how do you do that?
Thanks!

I think it's

[PostProcessBuild]
public static void OnPostProcessBuild(BuildTarget buildTarget, string path) {
if (buildTarget == BuildTarget.iOS) {
string projPath = path "/Unity-iPhone.xcodeproj/project.pbxproj";

	PBXProject proj = new PBXProject();
	proj.ReadFromString(File.ReadAllText(projPath));
	string target = proj.TargetGuidByName("Unity-iPhone");
	proj.AddBuildProperty(target, "OTHER_CFLAGS", "PB_FIELD_32BIT=1 PB_NO_PACKED_STRUCTS=1 $(inherited)");
	File.WriteAllText(projPath, proj.WriteToString());
}

}

In Xcode you should end up with the following settings:

Ok I have a temporary patch you can drop into your project. Replace the existing IOSResolver.dll under PlayServicesResolver/Editor with the attached file and regenerate your Xcode project.

IOSResolver.dll.zip

Yes, that seemed to work fine now!

Thanks a million, @stewartmiles, much appreciated!