Flutter cannot build against ARM simulators (on ARM macOS host)

Targeting an ARM simulator fails:

[plugin_lint_mac] [STDOUT] stdout:     ld: building for iOS Simulator, but linking in dylib built for iOS, file '/var/folders/3y/l0z1x3693dl_8n0qybp4dqwh0000gn/T/CocoaPods-Lint-20200812-67637-y2vglb-test_plugin_objc/Pods/Flutter/Flutter.framework/Flutter' for architecture arm64
[plugin_lint_mac] [STDOUT] stdout:     clang: error: linker command failed with exit code 1 (use -v to see invocation

Flutter.framework has 2 arm iOS slices and 1 x86 simulator slice. There is no ARM simulator slice.

Also seen on an x86 host with iOS 14 simulators (so Xcode 12) when ONLY_ACTIVE_ARCH=NO (configuration=Release)

Blocked by #66926

Not sure if there's any dart work to do, since it already supports ARM simulators? This may just require building the Flutter.framework with a new architecture slice.

See #2089, hopefully this is much less work than that was.

Lots of spots where simulator is synonymous with x86 https://github.com/flutter/engine/blob/ff62dec5c96d3560b36ca0a3924d28a3c97b7788/sky/tools/create_ios_framework.py#L32

Had to turn off linters when I upgrade Cirrus to Xcode 12 #63252
Plugins CI is going to hit the same failure when they try to upgrade.

I'm encountering this problem as well. (Actually opened a duplicate issue, oops.)

Any update on this? I'm happy to help if I can.

@jmagman

@jmagman In the context of some of the plumbing / tooling tasks that need to be done here, I would be happy to help, but I'm currently stuck on this issue: dart-lang/sdk#43488

If you've got a line to the Dart team (or an idea for circumventing this blocker some other way) I would appreciate the help.

There's a workaround for this issue:
Add config.build_settings['ONLY_ACTIVE_ARCH'] = 'YES' to the Podfile's post_install.
E.g:

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['ENABLE_BITCODE'] = 'NO'
      # Workaround for https://github.com/flutter/flutter/issues/64502
      config.build_settings['ONLY_ACTIVE_ARCH'] = 'YES'
    end
  end
end

I found the solution in another related issue here: flurry/flurry-ios-sdk#207 (comment)

config.build_settings['ONLY_ACTIVE_ARCH'] = 'YES'

That will let you build, but when you archive it won't build a fat binary with all the architectures your app supports. And it's only relevant if you're using plugins.

Fixing this will also let us turn back on plugin linters, and will let the plugins repo update Cirrus to Xcode 12.
#63252 (comment)

flutter/dev/devicelab/bin/tasks/plugin_lint_mac.dart

Lines 52 to 53 in d693d2b

    
           // TODO(jmagman): Flutter cannot build against ARM simulators https://github.com/flutter/flutter/issues/64502 
        
           canFail: true,

Also, dependent on the builders using iOS 14 #65901.

However to work around it until that's done, you can explicitly exclude arm64 from your simulator archs. I tried to do this programmatically for all projects in #73458 but unfortunately versions of Xcode older than 12 do not handle the dance between EXCLUDED_ARCHS and VALID_ARCHS correctly.

This has been fixed with #73828. On that PR you don't need to set EXCLUDED_ARCHS in your Podfile.

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

Navigation Menu

Repository navigation

Flutter cannot build against ARM simulators (on ARM macOS host) #64502

18 remaining items

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

	// TODO(jmagman): Flutter cannot build against ARM simulators https://github.com/flutter/flutter/issues/64502
	canFail: true,

Flutter cannot build against ARM simulators (on ARM macOS host) #64502

Description

Activity

jmagman commented on Aug 24, 2020

jmagman commented on Aug 24, 2020

jmagman commented on Aug 24, 2020

jmagman commented on Aug 25, 2020

alexmarkley commented on Sep 19, 2020

alexmarkley commented on Sep 21, 2020

Poweranimal commented on Sep 26, 2020

jmagman commented on Sep 28, 2020

jmagman commented on Sep 29, 2020

jmagman commented on Sep 29, 2020

hyvenzhu commented on Oct 13, 2020

18 remaining items

bhanuka96 commented on Jan 15, 2021

gourav6m17 commented on Jan 20, 2021

jmagman commented on Jan 20, 2021

jmagman commented on Mar 5, 2021

jigarfumakiya commented on Apr 4, 2021

jmagman commented on Apr 5, 2021

firatcetiner commented on Jun 28, 2021

jans-y commented on Jun 28, 2021

firatcetiner commented on Jun 28, 2021

jans-y commented on Jun 28, 2021

jmagman commented on Jun 28, 2021

github-actions commented on Jul 30, 2021

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions