Native linking failed, again! iOS, Xamarin.Forms, Admob...

[blmiles]

For those interested, I have the latest VS 2019 version (16.5.4), the latest XCode version (11.4.1) with iOS versions too. Building a Xamarin.Forms project, targeting Android and iOS.

If I include the latest Xamarin.Google.iOS.MobileAds (7.57.0) along with required dependencies (Firebase), I get this "failed to resolve ObjCRuntime.TrampolineBlockBase" too, along with 47 other build/compile errors for iOS.

If I exclude those plugin libraries, my iOS app compiles and runs just fine.

No build errors for Android.

It would be great to know what versions of these relevant plugins to include so that all is compatible with the other AND with the latest mono framework!

Someone building Xamarin.Google.iOS.MobileAds & the related firebase plugins dropped the ball.

SOMEONE NEEDS TO REOPEN THIS - Native linking failed #158

[SotoiGhost]

Hi @blmiles! Thanks for reporting this and an apology for the inconveniences that this could cause.

Are you using Firebase packages somehow inside of your app?

[blmiles]

@SotoiGhost thanks for responding.

No, I'm not using any Firebase packages at all.
I've tried various permutations with Xamarin.Google.iOS.MobileAds.
Some forums say to install xamarin.firebase.iOS plugin to negate errors but I found that just produced even more errors.
So I abandoned that, removed all related packages and put it aside for now. Ads have to wait.

[SotoiGhost]

@blmiles Please, use Firebase.Core somehow within your app, that should fix the linker errors, e.g:

var t = Firebase.Core.Configuration.SharedInstance;

Google Mobile Ads needs some dependencies that Firebase Core uses but if F.Core is not referenced somehow, the whole package is stripped by the linker.

Let me know you results.

[blmiles]

@SotoiGhost thanks for quick response. I'll add that to the AppDelegate and see what happens.
Probably only next week, please keep this open for a while.

Thx

[erhanalankus]

I'm having the same issue.
Steps to reproduce:

• Create a new Xamarin.Forms project.
• Deploy to iPhone, it works.
• Add "Xamarin.Google.iOS.MobileAds" nuget package to the iOS project.
• Try to deploy to iPhone, it fails with native linking errors.
• Add var t = Firebase.Core.Configuration.SharedInstance; (@SotoiGhost ) to the FinishedLaunching method(before Init()) in AppDelegate.cs, deploying to iPhone fails with a package inspection failed error error MT1006: Could not install the application '/Users/erhan/Library/Caches/Xamarin/mtbs/builds/App3.iOS/dc165bdc93b2cf601d2bf3e34e17376a/bin/iPhone/Debug/App3.iOS.app' on the device 'Erhan iPhone???u': Package Inspection Failed Error (error: 0xe8000051). There's also this line in the output window PackageInspectionFailed: Failed to load Info.plist from bundle at path /private/var/installd/Library/Caches/com.apple.mobile.installd.staging/temp.zRcsX3/extracted/App3.iOS.app/Frameworks/PersonalizedAdConsent.framework; Extra info about plist: ACL=<not found>.

[shpand]

can confirm this:
latest Xamarin.Google.iOS.MobileAds version (7.57.0) fails with error

PackageInspectionFailed: Failed to load Info.plist from bundle at path /private/var/installd/Library/Caches/com.apple.mobile.installd.staging/temp.zRcsX3/extracted/App3.iOS.app/Frameworks/PersonalizedAdConsent.framework

If I remove Xamarin.Google.iOS.MobileAds from my project or downgrade it to 7.19.0 everything works fine

[assassin316]

I can also confirm that I receive Linking Failures when simply referencing the Xamarin.Google.iOS.MobileAds nuget in my project. This issue seems to have started occurring since 7.47.0 which is the first version to depend on Firebase:

7.47.0

7.38.0

Referencing 7.38.0 builds successfully.

[kshumon2000]

Are there any updates on this?

[StoatsOnAPlane]

What is your Supported Architectures set to? I was able to get release mode build by changing it from ARMv7 + ARMv7s + ARM64 to just ARM64

[assassin316]

@StoatsOnAPlane Supported Architectures for me has always only been ARM64.

[assassin316]

@SotoiGhost has there been any update from the team on this issue?

[TomParonis]

I have been having this same issue and it has been driving me mad. My app is up on Google Play with AdMob and it worked seamlessly. My paid Apple app is also working but I am simply unable to add AdMob to Xamarin iOS. I can run it in debug mode but the only way I can build a release version for archiving is by specifying --registrar:dynamic but then I can't get the bundle version because of extra standalone libs. This is beyond frustrating and seems to demonstrate that you can't get Xamarin iOS working with AdMob in release version. If anyone could lead me out of this morass I'd happily pay them for their time as this has cost me 2 weeks of my life and a chunk of my mental health. This is the message I get with this little Hello World app and my more complicated app.

[TomParonis]

Whoops; wrong screenshot. Here's the right one.

[assassin316]

This issue has been dragging on for way too long. Is anyone from the Xamarin team going to respond??

[mgkcorty]

Same issue. Any updates? Temporary workaround select ARM64 arch only.