RCT-Folly error when using hermes with iOS

Question

When enabling hermes in the Podfile and rebuilding the build it fails due to RCT-Folly. No idea what it does.

To re-initialise everything I use the following:

rm -rf node_modules && rm package-lock.json && npm install && cd ios && rm -rf Pods && rm Podfile.lock && pod deintegrate && pod setup && pod install && cd ..

I also start the metro bundler with:

npx react-native --reset-cache

Anyone has a solution?

The app uses react-native v0.64 and we want to have a better performance using hermes.

All information:

ios/Podfile

require_relative '../node_modules/react-native/scripts/react_native_pods'
require_relative '../node_modules/@react-native-community/cli-platform-ios/native_modules'
platform :ios, '10.0'

target 'unblnd' do
  config = use_native_modules!
  use_react_native!(
    :path => config[:reactNativePath],
    :hermes_enabled => true
  )

  permissions_path = '../node_modules/react-native-permissions/ios'
  pod 'Permission-BluetoothPeripheral', :path => "#{permissions_path}/BluetoothPeripheral"
  pod 'Permission-Calendars', :path => "#{permissions_path}/Calendars"
  pod 'Permission-Camera', :path => "#{permissions_path}/Camera"
  pod 'Permission-Contacts', :path => "#{permissions_path}/Contacts"
  pod 'Permission-FaceID', :path => "#{permissions_path}/FaceID"
  pod 'Permission-LocationAlways', :path => "#{permissions_path}/LocationAlways"
  pod 'Permission-LocationWhenInUse', :path => "#{permissions_path}/LocationWhenInUse"
  pod 'Permission-MediaLibrary', :path => "#{permissions_path}/MediaLibrary"
  pod 'Permission-Microphone', :path => "#{permissions_path}/Microphone"
  pod 'Permission-Motion', :path => "#{permissions_path}/Motion"
  pod 'Permission-Notifications', :path => "#{permissions_path}/Notifications"
  pod 'Permission-PhotoLibrary', :path => "#{permissions_path}/PhotoLibrary"
  pod 'Permission-Reminders', :path => "#{permissions_path}/Reminders"
  pod 'Permission-Siri', :path => "#{permissions_path}/Siri"
  pod 'Permission-SpeechRecognition', :path => "#{permissions_path}/SpeechRecognition"
  pod 'Permission-StoreKit', :path => "#{permissions_path}/StoreKit"

  pod 'Yoga', :path => '../node_modules/react-native/ReactCommon/yoga', :modular_headers => true

  # add the Firebase pod for Google Analytics
  pod 'Firebase/Analytics'
  # add pods for any other desired Firebase products
  # https://firebase.google.com/docs/ios/setup#available-pods


  target 'unblndTests' do
    inherit! :complete
    # Pods for testing
  end
  # Enables Flipper.
  #
  # Note that if you have use_frameworks! enabled, Flipper will not work and
  # you should disable these next few lines.
  # flipper_pods()
  # post_install do |installer|
  #  flipper_post_install(installer)
  # end
end

Terminal Output

In file included from /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/RCT-Folly/folly/synchronization/DistributedMutex.cpp:17: In file included from /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/Headers/Private/RCT-Folly/folly/synchronization/DistributedMutex.h:352: /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/Headers/Private/RCT-Folly/folly/synchronization/DistributedMutex-inl.h:1051:5: error: 'atomic_notify_one<unsigned long>' is unavailable
    atomic_notify_one(state);
    ^ /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/Headers/Private/RCT-Folly/folly/synchronization/DistributedMutex-inl.h:1573:5: note: in instantiation of function template specialization 'folly::detail::distributed_mutex::wakeTimedWaiters<std::__1::atomic<unsigned long>>' requested here
    wakeTimedWaiters(&state_, proxy.timedWaiters_);
    ^ In file included from /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/RCT-Folly/folly/synchronization/DistributedMutex.cpp:17: In file included from /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/Headers/Private/RCT-Folly/folly/synchronization/DistributedMutex.h:19: In file included from /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/Headers/Private/RCT-Folly/folly/Optional.h:58: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator14.5.sdk/usr/include/c++/v1/functional:504: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator14.5.sdk/usr/include/c++/v1/memory:681: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator14.5.sdk/usr/include/c++/v1/atomic:2140:6: note: 'atomic_notify_one<unsigned long>' has been explicitly marked unavailable here void atomic_notify_one(atomic<_Tp>* __o) _NOEXCEPT
     ^ 1 error generated.

CompileC /Users/adriaandebolle/Library/Developer/Xcode/DerivedData/unblnd-cvaavakypguqqzftojmgjqbtdeij/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/RCT-Folly.build/Objects-normal/x86_64/Demangle-3c4c6b43c285d16c32230d6f0a7a76ce5af39228ed5c3beeaf7ed7d1344f76b0.o /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/RCT-Folly/folly/detail/Demangle.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler (in target 'RCT-Folly' from project 'Pods')

...

CompileC /Users/adriaandebolle/Library/Developer/Xcode/DerivedData/unblnd-cvaavakypguqqzftojmgjqbtdeij/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/RCT-Folly.build/Objects-normal/x86_64/Cursor.o /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/RCT-Folly/folly/io/Cursor.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler (in target 'RCT-Folly' from project 'Pods')
    cd /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods
    export LANG\=en_US.US-ASCII
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/

...

** BUILD FAILED **


The following build commands failed:    CompileC /Users/adriaandebolle/Library/Developer/Xcode/DerivedData/unblnd-cvaavakypguqqzftojmgjqbtdeij/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/RCT-Folly.build/Objects-normal/x86_64/DistributedMutex.o /Users/adriaandebolle/htdocs/unblnd_app/ios/Pods/RCT-Folly/folly/synchronization/DistributedMutex.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler (1 failure)

npx react-native info

System:
    OS: macOS 11.4
    CPU: (8) x64 Intel(R) Core(TM) i7-1068NG7 CPU @ 2.30GHz
    Memory: 1.05 GB / 16.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 14.17.0 - /usr/local/bin/node
    Yarn: Not Found
    npm: 6.14.13 - ~/htdocs/unblnd_app/node_modules/.bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  Managers:
    CocoaPods: 1.10.1 - /usr/local/bin/pod
  SDKs:
    iOS SDK:
      Platforms: iOS 14.5, DriverKit 20.4, macOS 11.3, tvOS 14.5, watchOS 7.4
    Android SDK:
      API Levels: 28, 29
      Build Tools: 28.0.3, 29.0.2, 29.0.3, 30.0.2
      System Images: android-29 | Intel x86 Atom_64, android-29 | Google APIs Intel x86 Atom
      Android NDK: Not Found
  IDEs:
    Android Studio: 4.2 AI-202.7660.26.42.7351085
    Xcode: 12.5.1/12E507 - /usr/bin/xcodebuild
  Languages:
    Java: 1.8.0_265 - /usr/bin/javac
  npmPackages:
    @react-native-community/cli: Not Found
    react: 17.0.1 => 17.0.1 
    react-native: 0.64.2 => 0.64.2 
    react-native-macos: Not Found
  npmGlobalPackages:
    *react-native*: Not Found

Answer 1

After lots of trial and error I found a working solution. It's a bit strange, but I had to enable Flipper. I did not find a way without it.

Thanks to this answer: https://github.com/facebook/react-native/issues/31179#issuecomment-831932941 I found out about fixing Pods.

This is my Podfile now:

  ...

  # Enables Flipper.
  #
  # Note that if you have use_frameworks! enabled, Flipper will not work and
  # you should disable these next few lines.
  use_flipper!({ 'Flipper' => '0.87' })
  post_install do |installer|
    flipper_post_install(installer)

    find_and_replace("Pods/Headers/Private/RCT-Folly/folly/synchronization/DistributedMutex-inl.h",
    "atomic_notify_one(state)", "folly::atomic_notify_one(state)")

    find_and_replace("Pods/Flipper-Folly/folly/synchronization/DistributedMutex-inl.h",
    "atomic_wait_until(&state, previous | data, deadline)", "folly::atomic_wait_until(&state, previous | data, deadline)")
  end

  ...