Prevent build errors for GoogleSignInSwift when using SPM

[petea]

Because SPM does not support target-specific platform min versions, our GoogleSignInSwift target is built for both arm64 and armv7. The armv7 stage of the build fails with missing SwiftUI symbol errors. The armv7 slice is unnecessary as this target can only be used on iOS 13+. This change works around the problem by preventing the armv7 build stage from doing any work.

[paulb777]

Kind of ugly, but I suppose it works.

We avoided the arm7/SPM issue in Firebase by requiring iOS 11 for SPM since SPM users don't have the legacy requirements of CocoaPods and haven't seen any complaints. https://github.com/firebase/firebase-ios-sdk/blob/master/Package.swift#L26

[petea]

Kind of ugly, but I suppose it works.

Unfortunately #if canImport(SwiftUI) succeeds in the armv7 scenario here, so that wasn't an option. I'd much prefer a SPM solution but I'm not seeing one short of moving the target into a separate repo and package.

[gmogames]

@petea do you think this will get merged and the 6.2.2 released today? This is breaking our ci pipelines for some of our environments and would be very good to have it merged before the holiday next week. Thank you!

[petea]

@gmogames we're aiming to release 6.2.2 in the next few hours.

[gmogames]

Thank you!

[petea]

@gmogames note that, as long as you're not using the new SwiftUI button, you can also remove the GoogleSignInSwift library from your project as SPM may have added it automatically.

[macintosh-HD]

Unfortunately I have to report that everything works fine for me as long as the build configuration is set to "Debug". As soon as I switch to "Release" I get the same errors again. Is there something I'm overlooking on my side? Or can you recreate this behaviour?

[petea]

@macintosh-HD I'm not able to recreate this, having looked briefly. Building with a release configuration using Archive or otherwise is working as expected for me. Can you provide detailed repro steps and tell me more about what you're building? Also, can you verify that you're using the latest 6.2.2 release?

[macintosh-HD]

Hey @petea!
I did some more testing but the problem remains.
I am using the sign-in button on a SwiftUI view in a project with a minimum deployment target of iOS 14.
19 issues appear from the GoogleSignInSwift module during compilation with a Release build configuration. All of them are missing SwiftUI symbol errors in the GoogleSignInButton.swift file.
I upgraded the package dependencies, removed the derived data folder and cleared the build folder. The package version is definitely 6.2.2.
What is interesting about this problem is that it only appears when I try to build&run on the simulator (iPhone 13 Pro iOS 15.5 - Release configuration). When I switch to build&run on my physical device instead or use a debug build configuration the errors disappear.
For your information I'm running the simulator on an Intel based MacBook (x86_64) if that is relevant.

MacOS 12.4, Xcode 13.4

[petea]

@macintosh-HD thanks for bringing this to my attention. I've now been able to repo and a fix is on the way.