output

$ flutter pub run ffigen -v fine
[ +122 ms] executing: [/home/robert/snap/flutter/common/flutter/] git -c log.showSignature=false log -n 1 --pretty=format:%H
[  +31 ms] Exit code 0 from: git -c log.showSignature=false log -n 1 --pretty=format:%H
[        ] f25bd9c55c48c139524139b477d04b13e9f36b2c
[        ] executing: [/home/robert/snap/flutter/common/flutter/] git tag --contains HEAD
[ +202 ms] Exit code 0 from: git tag --contains HEAD
[        ] 1.21.0-1.0.pre
           1.21.0-5.0.pre
[  +11 ms] executing: [/home/robert/snap/flutter/common/flutter/] git rev-parse --abbrev-ref --symbolic @{u}
[   +6 ms] Exit code 0 from: git rev-parse --abbrev-ref --symbolic @{u}
[        ] origin/dev
[        ] executing: [/home/robert/snap/flutter/common/flutter/] git ls-remote --get-url origin
[   +5 ms] Exit code 0 from: git ls-remote --get-url origin
[        ] https://github.com/flutter/flutter.git
[  +50 ms] executing: [/home/robert/snap/flutter/common/flutter/] git rev-parse --abbrev-ref HEAD
[   +6 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD
[        ] dev
[  +44 ms] Artifact Instance of 'AndroidMavenArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[   +2 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[   +9 ms] Artifact Instance of 'MaterialFonts' is not required, skipping update.
[        ] Artifact Instance of 'GradleWrapper' is not required, skipping update.
[        ] Artifact Instance of 'AndroidMavenArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[        ] Artifact Instance of 'FlutterSdk' is not required, skipping update.
[        ] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FontSubsetArtifacts' is not required, skipping update.
[  +35 ms] Using /home/robert/snap/flutter/common/flutter/.pub-cache for the pub cache.
[        ] executing: /home/robert/snap/flutter/common/flutter/bin/cache/dart-sdk/bin/pub run ffigen -v fine
Instance of 'Stdout'
Unable to create dynamic library automatically.
If LLVM is installed, try running:
  pub run ffigen:setup -Ipath/to/llvm/include -Lpath/to/llvm/lib
[ +515 ms] "flutter run" took 577ms.
[  +13 ms] pub finished with exit code 1
[   +2 ms] 
           #0      throwToolExit (package:flutter_tools/src/base/common.dart:14:3)
           #1      _DefaultPub.interactively (package:flutter_tools/src/dart/pub.dart:361:7)
           <asynchronous suspension>
           #2      PackagesForwardCommand.runCommand (package:flutter_tools/src/commands/packages.dart:235:15)
           #3      FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:869:18)
           #4      _rootRunUnary (dart:async/zone.dart:1198:47)
           #5      _CustomZone.runUnary (dart:async/zone.dart:1100:19)
           #6      _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
           #7      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
           #8      Future._propagateToListeners (dart:async/future_impl.dart:725:32)
           #9      Future._completeWithValue (dart:async/future_impl.dart:529:5)
           #10     Future._asyncCompleteWithValue.<anonymous closure> (dart:async/future_impl.dart:567:7)
           #11     _rootRun (dart:async/zone.dart:1190:13)
           #12     _CustomZone.run (dart:async/zone.dart:1093:19)
           #13     _CustomZone.runGuarded (dart:async/zone.dart:997:7)
           #14     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1037:23)
           #15     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
           #16     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
           #17     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
           #18     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:169:5)
           
           
[  +74 ms] ensureAnalyticsSent: 71ms
[   +3 ms] Running shutdown hooks
[        ] Shutdown hooks complete
[        ] exiting with code 1