Undefined symbols for architecture arm64

[francoangulo]

So like the title of this issue says, I'm getting Undefined symbols for architecture arm64 error for several RNCPicker elements. This happens as soon as I enable the new architecture in my project, and goes away as soon as I disable it. The thing is that react-native v0.82 is already out and they are not giving support for old architecture anymore, so my team needs to make it work. I got this to work by adding a post_install script in my Podfile, but I'm not sure how stable and reliable it is. More than like a bug or issue, this is something like a discussion asking if anyone has experienced this before and knows or have a better resolution that can be considered as stable and reliable.

Showing All Errors Only
Undefined symbol: facebook::react::RNCPickerProps::RNCPickerProps(facebook::react::PropsParserContext const&, facebook::react::RNCPickerProps const&, facebook::react::RawProps const&)

Undefined symbol: facebook::react::RNCPickerComponentName

Undefined symbol: facebook::react::RNCPickerEventEmitter::onChange(facebook::react::RNCPickerEventEmitter::OnChange) const

Linker command failed with exit code 1 (use -v to see invocation)

Maybe attaching here my post_install script someone could get some hints on what is going on:

    def add_fabric_components(installer, target_name, component_path)
      target = installer.pods_project.targets.find { |t| t.name == target_name }
      return unless target

      fabric_files = ['Props.cpp', 'ShadowNodes.cpp', 'ComponentDescriptors.cpp', 'EventEmitters.cpp', 'States.cpp']
      
      fabric_files.each do |file_name|
        file_path = File.join(installer.sandbox.root, "../build/generated/ios/react/renderer/components/#{component_path}/#{file_name}")
        if File.exist?(file_path)
          file_ref = installer.pods_project.new_file(file_path)
          target.source_build_phase.add_file_reference(file_ref)
          puts "✅ Added #{file_name} to #{target_name}"
        else
          puts "⚠️  #{target_name} #{file_name} not found yet (will be generated during build)"
        end
      end
    end

    add_fabric_components(installer, 'RNCPicker', 'rnpicker')

Note

I know guys that I'm not providing any reproducible repo or something, I don't want you to spend time inspecting this cause I'm not sure if there's something wrong on your side, but honestly I couldn't think of a better place to ask someone to get better understanding on what's going on

Steps to reproduce

react-native v0.81.4 @react-native-picker/picker v2.11.1

1- have the project running normally 2- enable new architecture by setting ENV['RCT_NEW_ARCH_ENABLED'] = '1' on Podfile 3- cd ios && pod install 4- run the app, it throws the error shown above