개요

평소에는 React Native에서 iOS 앱을 개발하고 있습니다.
이번에는, react-native-google-maps 등의 도입에 의해, React나 Yoga등을 pod install했을 때 Xcode로 build 하면 duplicate 에러가 나오는 문제를 해결하는 메모를 공유합니다

platform :ios, '9.0'
target 'Your App Name' do
 pod 'Yoga', :path => '../node_modules/react- native/ReactCommon/yoga'

 pod "React", :path =>  '../node_modules/react-native', :subspecs => [
     "Core",
      "ART",
      "RCTActionSheet",
      "RCTAnimation",
      "RCTCameraRoll",
      "RCTGeolocation",
      "RCTImage",
      "RCTNetwork",
      "RCTText",
      "RCTVibration",
      "RCTWebSocket",
      "DevSupport",
      "BatchedBridge"
  ]

  pod 'GoogleMaps'
  pod 'react-native-maps', path: '../node_modules/react-native-maps' 
  pod 'react-native-google-maps', path: '../node_modules/react-native-maps' 

end


post_install do |installer|
  installer.pods_project.targets.each do |target|
    if target.name == "react-native-google-maps"
      target.build_configurations.each do |config|
        config.build_settings['CLANG_ENABLE_MODULES'] = 'No'
      end
    end
  end
end

위와 같은 podfile로 pod install을하면 아래와 같은 오류가 발생합니다.

ld: warning: directory not found for option '-L/Directory/Your/App/name'
duplicate symbol _OBJC_CLASS_$_RCTVibration in:
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libReact.a(RCTVibration.o)
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libRCTVibration.a(RCTVibration.o)
duplicate symbol _OBJC_METACLASS_$_RCTVibration in:
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libReact.a(RCTVibration.o)
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libRCTVibration.a(RCTVibration.o)
duplicate symbol _OBJC_CLASS_$_RCTFrameAnimation in:
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libReact.a(RCTFrameAnimation.o)
~~~中略~~~
duplicate symbol _OBJC_METACLASS_$_RCTWebSocketModule in:
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libReact.a(RCTWebSocketModule.o)
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libRCTWebSocket.a(RCTWebSocketModule.o)
duplicate symbol _OBJC_CLASS_$_PodsDummy_Yoga in:
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libYoga.a(Yoga-dummy.o)
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libyoga.a(Yoga-dummy.o)
duplicate symbol _OBJC_METACLASS_$_PodsDummy_Yoga in:
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libYoga.a(Yoga-dummy.o)
    /Directory/Your/App/NameBuild/Intermediates.noindex/ArchiveIntermediates/yourappname/BuildProductsPath/Release-iphoneos/libyoga.a(Yoga-dummy.o)
ld: 421 duplicate symbols for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

해결

pod install시에 React와 Yoga가 pod로 인스톨되어 버리고 있으므로, workspace에서 열어 pod 프로젝트를 선택한다

React와 Yoga가 있기 때문에
아래 이미지처럼 React와 Yoga를 Target에서 제거


이제 duplicate가 나오지 않으므로 build가 정상적으로 할 수 있습니다.