'Multiple commands produce' error when building with new Xcode build system

[maxim-lobanov]

Hello,

Environment:

React Native Environment Info:
    System OS: macOS High Sierra 10.13.6
    Binaries:
      Node: 8.11.3 - /usr/local/bin/node
      npm: 5.6.0 - /usr/local/bin/npm
    IDEs:
      Xcode: 10 Beta 3
    npmPackages:
      react: 16.4.1
      react-native: 0.56.0

Error:

I got the following error when I try to build the simple RN 0.56 application:

warning: Skipping duplicate build file in Compile Sources build phase: <PATH_TO_PROJECT>/node_modules/react-native/React/Modules/RCTRedBoxExtraDataViewController.m (in target 'React-tvOS')
...
warning: duplicate output file '<HOME>/Library/Developer/Xcode/DerivedData/ReactNativeSimple-dpupkkuvhsslwxgngxzqgwsrazap/Build/Intermediates.noindex/ArchiveIntermediates/ReactNativeSimple/BuildProductsPath/Release-iphoneos/include/React/RCTResizeMode.h' on task: PBXCp <PATH_TO_PROJECT>/node_modules/react-native/Libraries/Image/RCTResizeMode.h <HOME>/Library/Developer/Xcode/DerivedData/ReactNativeSimple-dpupkkuvhsslwxgngxzqgwsrazap/Build/Intermediates.noindex/ArchiveIntermediates/ReactNativeSimple/BuildProductsPath/Release-iphoneos/include/React/RCTResizeMode.h (in target 'React')
...
error: Multiple commands produce '<PbxCp <HOME>/Library/Developer/Xcode/DerivedData/ReactNativeSimple-dpupkkuvhsslwxgngxzqgwsrazap/Build/Intermediates.noindex/ArchiveIntermediates/ReactNativeSimple/BuildProductsPath/Release-iphoneos/include/React/RCTScrollableProtocol.h>':
1) Target 'React-tvOS' has copy command from '<PATH_TO_PROJECT>/node_modules/react-native/React/Views/ScrollView/RCTScrollableProtocol.h' to '<HOME>/Library/Developer/Xcode/DerivedData/ReactNativeSimple-dpupkkuvhsslwxgngxzqgwsrazap/Build/Intermediates.noindex/ArchiveIntermediates/ReactNativeSimple/BuildProductsPath/Release-iphoneos/include/React/RCTScrollableProtocol.h'
2) Target 'React' has copy command from '<PATH_TO_PROJECT>/node_modules/react-native/React/Views/ScrollView/RCTScrollableProtocol.h' to '<HOME>/Library/Developer/Xcode/DerivedData/ReactNativeSimple-dpupkkuvhsslwxgngxzqgwsrazap/Build/Intermediates.noindex/ArchiveIntermediates/ReactNativeSimple/BuildProductsPath/Release-iphoneos/include/React/RCTScrollableProtocol.h'
error: Multiple commands produce '<HOME>/Library/Developer/Xcode/DerivedData/ReactNativeSimple-dpupkkuvhsslwxgngxzqgwsrazap/Build/Intermediates.noindex/ArchiveIntermediates/ReactNativeSimple/BuildProductsPath/Release-iphoneos/include/double-conversion/fast-dtoa.h':
1) Target 'double-conversion-tvOS' has copy command from '<PATH_TO_PROJECT>/node_modules/react-native/third-party/double-conversion-1.1.5/src/fast-dtoa.h' to '<HOME>/Library/Developer/Xcode/DerivedData/ReactNativeSimple-dpupkkuvhsslwxgngxzqgwsrazap/Build/Intermediates.noindex/ArchiveIntermediates/ReactNativeSimple/BuildProductsPath/Release-iphoneos/include/double-conversion/fast-dtoa.h'
2) Target 'double-conversion' has copy command from '<PATH_TO_PROJECT>/node_modules/react-native/third-party/double-conversion-1.1.5/src/fast-dtoa.h' to '<HOME>/Library/Developer/Xcode/DerivedData/ReactNativeSimple-dpupkkuvhsslwxgngxzqgwsrazap/Build/Intermediates.noindex/ArchiveIntermediates/ReactNativeSimple/BuildProductsPath/Release-iphoneos/include/double-conversion/fast-dtoa.h'
...

Repro steps:

• react-native init
• xcodebuild -project <PATH_TO_PROJECT>/ios/ReactNativeSimple.xcodeproj -scheme ReactNativeSimple archive -sdk iphoneos -archivePath <PATH_TO_PROJECT>/output/build/archive/ReactNativeSimple CODE_SIGN_STYLE=Automatic

Details:

I tested it on the simple RN application that was created by "react-native init" command.
When I try to build the app using Xcode 10 GUI - it builds successfully.
But I try to build it using xcodebuild command - it failed with the error above.

When we use the same command on the same application (RN 0.56) in Xcode 9.4.1 - it builds successfully
If I don't specify -sdk param in xcodebuild command it builds successfully.
Note: Errors may be different for the different Xcode 10 Beta versions.

Questions:

Does RN 0.56 support Xcode 10 Beta?
How I can fix it?
Is there workaround to build it using Xcode 10 Beta?

[ericschaal]

You can try to change the build system to Legacy,
File > Workspace Settings > Build System > Legacy Build System.

[maxim-lobanov]

We want to use new build system.

[hramos]

The new build system should be supported. We're tracking any issues people run into with Xcode 10 or the new build system in this task: #19573

At a glance, it does not seem like your issue is covered by what we've fixed so far on master. I'll add it to the list.

[PaulMest]

I also had the Multiple commands produce error with libReact.a & libyoga.a.
I'm using:

• Xcode 10
• react-native 0.57.0
• CocoaPods

To overcome this, I have added this to my Podfile:

  post_install do |installer|
    installer.pods_project.targets.each do |target|

      # The following is needed to ensure the "archive" step works in XCode.
      # It removes React & Yoga from the Pods project, as it is already included in the main project.
      # Without this, you'd see errors when you archive like:
      # "Multiple commands produce ... libReact.a"
      # "Multiple commands produce ... libyoga.a"

      targets_to_ignore = %w(React yoga)
      
      if targets_to_ignore.include? target.name
        target.remove_from_project
      end

    end
  end

Then rebuild your Pods project with:

$ pod install

Full environment details:

  React Native Environment Info:
    System:
      OS: macOS High Sierra 10.13.6
      CPU: x64 Intel(R) Core(TM) i9-8950HK CPU @ 2.90GHz
      Memory: 4.10 GB / 32.00 GB
      Shell: 3.2.57 - /bin/bash
    Binaries:
      Node: 10.9.0 - ~/.nvm/versions/node/v10.9.0/bin/node
      Yarn: 1.9.4 - /usr/local/bin/yarn
      npm: 6.4.1 - ~/.nvm/versions/node/v10.9.0/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 12.0, macOS 10.14, tvOS 12.0, watchOS 5.0
    IDEs:
      Xcode: 10.0/10A255 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.5.0 => 16.5.0
      react-native: 0.57.0 => 0.57.0
    npmGlobalPackages:
      create-react-native-app: 1.0.0
      react-native-cli: 2.0.1

[fungilation]

Confirmed @PaulMest's workaround works. Manually deleting Yoga in Xcode, from the Pods project's Targets should work too, as I've been doing with React which has been causing duplicate targets build errors as well, before RN 0.57.

[onmyway133]

If you are using xcodebuild, append this -UseModernBuildSystem=NO to opt into the old legacy build system

[Kamill90]

@PaulMest Thanks, I've made my day

[noahtallen]

Hopefully my situation can help you guys fix the issue!

Here is the full output:

:-1: Multiple commands produce '/Users/ntomallen/Library/Developer/Xcode/DerivedData/zonder-bkcoqubqbalyhffxhurxhkuivvms/Build/Products/Debug-iphonesimulator/zonder.app/Roboto.ttf':
1) Target 'zonder' (project 'zonder') has copy command from '/Users/ntomallen/source/zonder-mobile-app/node_modules/native-base/Fonts/Roboto.ttf' to '/Users/ntomallen/Library/Developer/Xcode/DerivedData/zonder-bkcoqubqbalyhffxhurxhkuivvms/Build/Products/Debug-iphonesimulator/zonder.app/Roboto.ttf'
2) Target 'zonder' (project 'zonder') has copy command from '/Users/ntomallen/source/zonder-mobile-app/src/Resources/Fonts/Roboto.ttf' to '/Users/ntomallen/Library/Developer/Xcode/DerivedData/zonder-bkcoqubqbalyhffxhurxhkuivvms/Build/Products/Debug-iphonesimulator/zonder.app/Roboto.ttf'

:-1: Multiple commands produce '/Users/ntomallen/Library/Developer/Xcode/DerivedData/zonder-bkcoqubqbalyhffxhurxhkuivvms/Build/Products/Debug-iphonesimulator/zonder.app/Zocial.ttf':
1) Target 'zonder' (project 'zonder') has copy command from '/Users/ntomallen/source/zonder-mobile-app/node_modules/native-base/Fonts/Zocial.ttf' to '/Users/ntomallen/Library/Developer/Xcode/DerivedData/zonder-bkcoqubqbalyhffxhurxhkuivvms/Build/Products/Debug-iphonesimulator/zonder.app/Zocial.ttf'
2) Target 'zonder' (project 'zonder') has copy command from '/Users/ntomallen/source/zonder-mobile-app/node_modules/react-native-vector-icons/Fonts/Zocial.ttf' to '/Users/ntomallen/Library/Developer/Xcode/DerivedData/zonder-bkcoqubqbalyhffxhurxhkuivvms/Build/Products/Debug-iphonesimulator/zonder.app/Zocial.ttf'

:-1: Multiple commands produce '/Users/ntomallen/Library/Developer/Xcode/DerivedData/zonder-bkcoqubqbalyhffxhurxhkuivvms/Build/Products/Debug-iphonesimulator/zonder.app/Ionicons.ttf':
1) Target 'zonder' (project 'zonder') has copy command from '/Users/ntomallen/source/zonder-mobile-app/node_modules/native-base/Fonts/Ionicons.ttf' to '/Users/ntomallen/Library/Developer/Xcode/DerivedData/zonder-bkcoqubqbalyhffxhurxhkuivvms/Build/Products/Debug-iphonesimulator/zonder.app/Ionicons.ttf'
2) Target 'zonder' (project 'zonder') has copy command from '/Users/ntomallen/source/zonder-mobile-app/node_modules/react-native-vector-icons/Fonts/Ionicons.ttf' to '/Users/ntomallen/Library/Developer/Xcode/DerivedData/zonder-bkcoqubqbalyhffxhurxhkuivvms/Build/Products/Debug-iphonesimulator/zonder.app/Ionicons.ttf'

Essentially, react-native-vector-icons and native-base both bundle the same font files. (And for some reason we also have one of them bundled ourselves; I'll be sure to remove that one.) Before updating to Xcode 10 / Mojave, there was no issue. The only change was to update from Xcode 9 to Xcode 10.