Error targeting iOS 13.0 when using Flutter 3.3

[Jordan-Nelson]

Description

When using a deployment target above 11 (required for DataStore) and Flutter 3.3.x, iOS builds will fail with the exception: error: compiling for iOS 11.0, but module 'amplify_core' has a minimum deployment target of iOS 13.0 (see example of a complete error message below).

Full error:

    import amplify_core
           ^
    Command EmitSwiftModule failed with a nonzero exit code
    error: emit-module command failed with exit code 1 (use -v to see invocation)
/Users/nejrd/.pub-cache/hosted/pub.dartlang.org/amplify_flutter_ios-0.6.6/ios/Classes/SwiftAmplify.swift:21:8: error: compiling for iOS 11.0, but module 'amplify_core' has a minimum deployment target of iOS 13.0: /Users/nejrd/Documents/dev/sb/min_dep_target/build/ios/Debug-iphonesimulator/amplify_core/amplify_core.framework/Modules/amplify_core.swiftmodule/x86_64-apple-ios-simulator.swiftmodule
    import amplify_core
           ^
    Command EmitSwiftModule failed with a nonzero exit code
    error: emit-module command failed with exit code 1 (use -v to see invocation)
    note: Using new build system
    note: Planning
    note: Build preparation complete
    note: Building targets in dependency order
    Result bundle written to path:
    	/var/folders/3n/3plhqvn96jq6thcpd50d2pgh0000gr/T/flutter_tools.MQMSYm/flutter_ios_build_temp_dir7CAtzA/temporary_xcresult_bundle
Swift Compiler Error (Xcode): Compiling for iOS 11.0, but module 'amplify_core' has a minimum deployment target of iOS 13.0: /Users/nejrd/Documents/dev/sb/min_dep_target/build/ios/Debug-iphonesimulator/amplify_core/amplify_core.framework/Modules/amplify_core.swiftmodule/arm64-apple-ios-simulator.swiftmodule
/Users/nejrd/.pub-cache/hosted/pub.dartlang.org/amplify_flutter_ios-0.6.6/ios/Classes/SwiftAmplify.swift:20:7

Uncategorized (Xcode): Command EmitSwiftModule failed with a nonzero exit code
2

Could not build the application for the simulator.
Error launching application on iPhone 13.
Exited

Categories

• Analytics
• API (REST)
• API (GraphQL)
• Auth
• Authenticator
• DataStore
• Storage

Steps to Reproduce

1. 'flutter create <project_name>
2. Add amplify_flutter 0.6.6 as a dependency
3. Change the min deployment target in ios/Podfile
   4.Build the app for iOS

Screenshots

No response

Platforms

• iOS
• Android
• Web
• macOS
• Windows
• Linux

Android Device/Emulator API Level

No response

Environment

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.3.1, on macOS 12.5.1 21G83 darwin-x64, locale en-US)
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.
[✓] Xcode - develop for iOS and macOS (Xcode 13.4.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2021.2)
[✓] VS Code (version 1.71.0)
[✓] Connected device (3 available)
[✓] HTTP Host Availability

! Doctor found issues in 1 category.

Dependencies

Dart SDK 2.18.0
Flutter SDK 3.3.1
min_dep_target 1.0.0+1

dependencies:
- amplify_flutter 0.6.6 [amplify_core amplify_datastore_plugin_interface amplify_flutter_android amplify_flutter_ios aws_common collection flutter meta plugin_platform_interface]
- cupertino_icons 1.0.5
- flutter 0.0.0 [characters collection material_color_utilities meta vector_math sky_engine]

transitive dependencies:
- amplify_core 0.6.6 [aws_common collection flutter intl json_annotation meta plugin_platform_interface uuid]
- amplify_datastore_plugin_interface 0.6.6 [amplify_core collection flutter meta]
- amplify_flutter_android 0.6.6 [flutter]
- amplify_flutter_ios 0.6.6 [amplify_core flutter]
- async 2.9.0 [collection meta]
- aws_common 0.1.1 [async collection http meta stream_transform uuid]
- characters 1.2.1
- clock 1.1.1
- collection 1.16.0
- crypto 3.0.2 [typed_data]
- http 0.13.5 [async http_parser meta path]
- http_parser 4.0.1 [collection source_span string_scanner typed_data]
- intl 0.17.0 [clock path]
- json_annotation 4.6.0 [meta]
- material_color_utilities 0.1.5
- meta 1.8.0
- path 1.8.2
- plugin_platform_interface 2.1.2 [meta]
- sky_engine 0.0.99
- source_span 1.9.0 [collection path term_glyph]
- stream_transform 2.0.0
- string_scanner 1.1.1 [source_span]
- term_glyph 1.2.1
- typed_data 1.3.1 [collection]
- uuid 3.0.6 [crypto]
- vector_math 2.1.2

Device

iPhone 13

OS

iOS 15.5

Deployment Method

Amplify CLI

CLI Version

N/A

Additional Context

No response

Amplify Config

N/A

[Jordan-Nelson]

Current Work Arounds

Option 1: Downgrade to flutter 3.0.5.

This issue only surfaces in flutter 3.3.x. Temporarily downgrading to flutter 3.0.5 or lower should resolve this issue.

Option 2: Update your Podfile with a post_install hook

Update the existing post install hook in your Podfile

+ deployment_target = '13.0' # Update to match your min version

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
+     target.build_configurations.each do |config|
+         config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = deployment_target
+     end
  end
end

[dnys1]

A fix for this has been released in v0.6.7