macOS build warnings in firebase_core, firebase_auth, firebase_app_check

[bniladridas]

When building a Flutter app for macOS using the latest versions of Firebase plugins, several warnings appear during compilation:

firebase_core (4.3.0):

• Incompatible pointer types assigning to 'NSString * _Nullable' from 'NSNull * _Nonnull' in FLTFirebaseCorePlugin.m:92

firebase_auth (6.1.3):

• Incomplete implementation in FLTPhoneNumberVerificationStreamHandler.m
• Sending incompatible type in FLTFirebaseAuthPlugin.m
• Unused variables and deprecated declarations (fetchSignInMethodsForEmail, updateEmail)
• Unused function handleAppleAuthResult

firebase_app_check (0.4.1+3):

• Unguarded availability for FIRAppAttestProvider (macOS 11.3+)

These warnings are from the plugin's native code and cannot be suppressed locally without hiding all warnings. They appear harmless but clutter the build output. Please consider fixing them in future releases.

Related: bniladridas/browser#130 (PR that suppresses these warnings in build configs)

Flutter version: 3.38.5
Dart version: 3.10.4
macOS version: 15.2 (26.2 25C56 darwin-arm64)
Xcode version: 16.2

[SelaseKay]

Hi @bniladridas, are the warnings similar to those described in this issue: #17360?

[bniladridas]

@SelaseKay

Is it okay if you have a little time to look at this log https://github.com/bniladridas/browser/actions/runs/20651263928/job/59296554837

same as you mentioned in the issue I suppose.

[SelaseKay]

@bniladridas, thanks for confirming. I'll close this as a duplicate of #17360.