Undefined symbols for architecture arm64

[MagnusJohansson]

Flutter v2.5, Xcode v12.4

Steps to reproduce:

• flutter create testproject
• add dependency facebook_audience_network: ^1.0.0-nullsafety.0
• flutter run

Output:

Xcode's output:
↳
    Undefined symbols for architecture arm64:
      "_OBJC_CLASS_$_SKAdImpression", referenced from:
          objc-class-ref in FBAudienceNetwork(FBAdSKAdNetworkManager.m.o)
    ld: symbol(s) not found for architecture arm64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    note: Using new build system
    note: Building targets in parallel
    note: Planning build
    note: Constructing build description

[MagnusJohansson]

It seems that it might have been an issue with my setup. After trying on a new Mac with everything freshly installed, I haven't seen this problem.