Undefined symbol: _OBJC_CLASS_$_PrivateSentrySDKOnly

[mahmed8003]

Platform:

• Flutter Android or iOS

IDE:

• IntelliJ/AS
• XCode

Platform installed with:

• pub.dev

Output of the command flutter doctor -v below:

Flutter 3.7.5 • channel stable • https://github.com/flutter/flutter.git
Framework • revision c07f788888 (6 days ago) • 2023-02-22 17:52:33 -0600
Engine • revision 0f359063c4
Tools • Dart 2.19.2 • DevTools 2.20.1

The version of the SDK (See pubspec.lock):

sentry_flutter: ^6.19.0
sentry_flutter: ^6.21.0

---

Failed to run the app on iPhone simulator, Error during the compilation process.

Launching lib/main.dart on iPhone 8 in debug mode...
Running pod install...
Running Xcode build...
Xcode build done.                                           18.6s
Failed to build iOS app
Error (Xcode): Undefined symbol: _OBJC_CLASS_$_PrivateSentrySDKOnly

Error (Xcode): Undefined symbol: _OBJC_CLASS_$_SentryBreadcrumb

Error (Xcode): Undefined symbol: _OBJC_CLASS_$_SentryDebugMeta

Error (Xcode): Undefined symbol: _OBJC_CLASS_$_SentrySDK

Error (Xcode): Undefined symbol: _OBJC_CLASS_$_SentryUser

Could not build the application for the simulator.
Error launching application on iPhone 8.

Everything works fine when I run the app on a real ios device. I am able to create new builds and upload them. But when I try to run the app on an ios simulator compilation process throws the above errors. I first face this error when I upgraded to sentry_flutter: ^6.19.0 and later today I upgraded to sentry_flutter: ^6.21.0 and the issue still persists.
I have tried cleaning project, cleaning pods, removing Podfile.lock but nothing worked.
pod install actually installs Installing Sentry (7.31.5)

[marandaneto]

@mahmed8003 its likely something in your environment, just created an empty project and it works.
can you provide a minimal reproducible example?

[ichiwaki-altlas]

same problem.

[mahmed8003]

@marandaneto I created a new project and integrated the sentry library, everything worked fine on the simulator but then I added these configurations to Pod file and the error start to appear again.

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
        config.build_settings['EXPANDED_CODE_SIGN_IDENTITY'] = ""
        config.build_settings['CODE_SIGNING_REQUIRED'] = "NO"
        config.build_settings['CODE_SIGNING_ALLOWED'] = "NO"
    end
    flutter_additional_ios_build_settings(target)
  end
  installer.pods_project.build_configurations.each do |config|
    config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64 i386"
  end
end

Following is the test project run for ios simulator.
sentry_test.zip

[brustolin]

Hello @mahmed8003.
By adding the following line, you're asking the compiler to not compile Sentry for the simulator

config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64 i386"

I tried your sample and it works when I target a real device.
Why do you need this?

[mahmed8003]

Hi @brustolin
I need to exclude iphonesimulator* because of Mapbox. If I remove these settings I get the following error.

Launching lib/main.dart on iPhone 8 in debug mode...
Running pod install...
Running Xcode build...
Xcode build done.                                           32.9s
Failed to build iOS app
Error (Xcode): Building for iOS Simulator, but linking in dylib built for iOS, file '/xxxxxxx/xxxxxxx/ios/Pods/Mapbox-iOS-SDK/dynamic/Mapbox.framework/Mapbox' for architecture arm64

Could not build the application for the simulator.
Error launching application on iPhone 8.

I have had these settings before and the sentry was working fine with older versions.

[brustolin]

I have had these settings before and the sentry was working fine with older versions.

Thats interesting, I would have to investigate.

For now try this pod configuration:

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
        config.build_settings['EXPANDED_CODE_SIGN_IDENTITY'] = ""
        config.build_settings['CODE_SIGNING_REQUIRED'] = "NO"
        config.build_settings['CODE_SIGNING_ALLOWED'] = "NO"
        config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64 i386" unless target.name.include? 'Sentry'
    end
    flutter_additional_ios_build_settings(target)
  end
end

[mahmed8003]

@brustolin your comment enabled me learn more about pod configurations 🤝
so I tweak the configuration a little more and with the following configurations things are working fine on the simulator

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    target.build_configurations.each do |config|
        if target.name.include?('Mapbox') or target.name.include?('mapbox_gl')
          config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64 i386"
        end
    end
  end
end