Can't build a sample app due to cocoas pods error.

[gonnashred]

Hi All,

Frairly new to flutter, and trying to get a sample up and running using flutter_chat_ui and getting an error in cocoapods.

Environment is:
Brand new Mac mini M1
Visual studio with the Flutter development extensions installed
Ruby 2.6.3p62

When trying to build a trivial sample, I get a cocoapods error:

Launching lib/main.dart on iPhone 12 Pro Max in debug mode...
lib/main.dart:1
CocoaPods' output:
↳
Preparing
Analyzing dependencies
Inspecting targets to integrate
Using ARCHS setting to build architectures of target Pods-Runner: (``)
Fetching external sources
-> Fetching podspec for Flutter from `Flutter`
-> Fetching podspec for `url_launcher` from `.symlinks/plugins/url_launcher/ios`
Resolving dependencies of `Podfile`
Error output from CocoaPods:
↳
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require': dlopen(/Library/Ruby/Gems/2.6.0/gems/ffi-1.15.4/lib/ffi_c.bundle, 9): no suitable image found. Did find: (LoadError)
/Library/Ruby/Gems/2.6.0/gems/ffi-1.15.4/lib/ffi_c.bundle: mach-o, but wrong architecture
/Library/Ruby/Gems/2.6.0/gems/ffi-1.15.4/lib/ffi_c.bundle: mach-o, but wrong architecture - /Library/Ruby/Gems/2.6.0/gems/ffi-1.15.4/lib/ffi_c.bundle
from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Library/Ruby/Gems/2.6.0/gems/ffi-1.15.4/lib/ffi.rb:5:in `rescue in <top (required)>'
from /Library/Ruby/Gems/2.6.0/gems/ffi-1.15.4/lib/ffi.rb:2:in `<top (required)>'

Thanks in advance for any help you can offer. Great effort you guys have going here.

Thanks,
Adam

[demchenkoalex]

Hey @gonnashred I have M1 myself and the error tells you that ffi Ruby dependency has no support for ARM architecture, you can also easily google it, but basically on M1 you still can't successfully perform pod install without running in Rosetta mode.

Find your terminal app, right click on it, Get Info, and check Open using Rosetta, then you can navigate to the example/ios folder and run pod install (from the terminal in Rosetta mode, that console in VSCode will be in the ARM mode, unless you run all VSCode in Rosetta). After successful pod install you can normally run the app from VSCode (ARM). This is my workflow.

There are alternative solutions, again can be easily found in Google (keep in mind that alternative solutions still will be somewhat connected with running in Rosetta, so it is the easiest thing, described above)

[gonnashred]

This got me most of the way there. Before it would fully work, I had to run sudo gem install ffi to get the correct gem on. Then your above answer worked perfect. Thank you.