duplicate symbols for architecture x86_64 React Ntaive version 0.64

[CRathod1220]

I got this when build with latest version of react-native

duplicate symbol 'folly::detail::str_to_bool(folly::Range<char const*>)' in:
/Users/charlier/Library/Developer/Xcode/DerivedData/BanjaraWedding-hhgkttbaoprqvgftffbbkscdmncr/Build/Products/Debug-iphonesimulator/Flipper-Folly/libFlipper-Folly.a(Conv.o)
/Users/charlier/Library/Developer/Xcode/DerivedData/BanjaraWedding-hhgkttbaoprqvgftffbbkscdmncr/Build/Products/Debug-iphonesimulator/RCT-Folly/libRCT-Folly.a(Conv.o)
duplicate symbol 'folly::makeConversionError(folly::ConversionCode, folly::Range<char const>)' in:
/Users/charlier/Library/Developer/Xcode/DerivedData/BanjaraWedding-hhgkttbaoprqvgftffbbkscdmncr/Build/Products/Debug-iphonesimulator/Flipper-Folly/libFlipper-Folly.a(Conv.o)
/Users/charlier/Library/Developer/Xcode/DerivedData/BanjaraWedding-hhgkttbaoprqvgftffbbkscdmncr/Build/Products/Debug-iphonesimulator/RCT-Folly/libRCT-Folly.a(Conv.o)
ld: 2 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

1.react-native: 0.64
2.xcode :12.5.1
3.React :17

#PodFile look like

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

def flipper_pods()
flipperkit_version = '0.90.0'
pod 'FlipperKit', '>' + flipperkit_version, :configuration => 'Debug'
pod 'FlipperKit/FlipperKitLayoutPlugin', '>' + flipperkit_version, :configuration => 'Debug'
pod 'FlipperKit/SKIOSNetworkPlugin', '>' + flipperkit_version, :configuration => 'Debug'
pod 'FlipperKit/FlipperKitUserDefaultsPlugin', '>' + flipperkit_version, :configuration => 'Debug'
pod 'FlipperKit/FlipperKitReactPlugin', '~>' + flipperkit_version, :configuration => 'Debug'
end

def flipper_post_install(installer)
file_name = Dir.glob("*.xcodeproj")[0]
app_project = Xcodeproj::Project.open(file_name)
app_project.native_targets.each do |target|
target.build_configurations.each do |config|
cflags = config.build_settings['OTHER_CFLAGS'] || '$(inherited) '
unless cflags.include? '-DFB_SONARKIT_ENABLED=1'
puts 'Adding -DFB_SONARKIT_ENABLED=1 in OTHER_CFLAGS...'
cflags << '-DFB_SONARKIT_ENABLED=1'
end
config.build_settings['OTHER_CFLAGS'] = cflags
end
app_project.save
end
installer.pods_project.save
end

target 'Example' do
pod 'FBLazyVector', :path => "../node_modules/react-native/Libraries/FBLazyVector"
pod 'FBReactNativeSpec', :path => "../node_modules/react-native/React/FBReactNativeSpec"
pod 'RCTRequired', :path => "../node_modules/react-native/Libraries/RCTRequired"
pod 'RCTTypeSafety', :path => "../node_modules/react-native/Libraries/TypeSafety"
pod 'React', :path => '../node_modules/react-native/'
pod 'React-Core', :path => '../node_modules/react-native/'
pod 'React-CoreModules', :path => '../node_modules/react-native/React/CoreModules'
pod 'React-Core/DevSupport', :path => '../node_modules/react-native/'
pod 'React-RCTActionSheet', :path => '../node_modules/react-native/Libraries/ActionSheetIOS'
pod 'React-RCTAnimation', :path => '../node_modules/react-native/Libraries/NativeAnimation'
pod 'React-RCTBlob', :path => '../node_modules/react-native/Libraries/Blob'
pod 'React-RCTImage', :path => '../node_modules/react-native/Libraries/Image'
pod 'React-RCTLinking', :path => '../node_modules/react-native/Libraries/LinkingIOS'
pod 'React-RCTNetwork', :path => '../node_modules/react-native/Libraries/Network'
pod 'React-RCTSettings', :path => '../node_modules/react-native/Libraries/Settings'
pod 'React-RCTText', :path => '../node_modules/react-native/Libraries/Text'
pod 'React-RCTVibration', :path => '../node_modules/react-native/Libraries/Vibration'
pod 'React-Core/RCTWebSocket', :path => '../node_modules/react-native/'

pod 'React-cxxreact', :path => '../node_modules/react-native/ReactCommon/cxxreact'
pod 'React-jsi', :path => '../node_modules/react-native/ReactCommon/jsi'
pod 'React-jsiexecutor', :path => '../node_modules/react-native/ReactCommon/jsiexecutor'
pod 'React-jsinspector', :path => '../node_modules/react-native/ReactCommon/jsinspector'
pod 'ReactCommon/turbomodule/core', :path => "../node_modules/react-native/ReactCommon"
pod 'Yoga', :path => '../node_modules/react-native/ReactCommon/yoga'
pod 'React-perflogger', :path => '../node_modules/react-native/ReactCommon/reactperflogger'
pod 'React-runtimeexecutor', :path => '../node_modules/react-native/ReactCommon/runtimeexecutor'
pod 'react-native-fbsdk', :path => '../node_modules/react-native-fbsdk'

pod 'DoubleConversion', :podspec => '../node_modules/react-native/third-party-podspecs/DoubleConversion.podspec'
pod 'glog', :podspec => '../node_modules/react-native/third-party-podspecs/glog.podspec'
pod 'RCT-Folly', :podspec => '../node_modules/react-native/third-party-podspecs/RCT-Folly.podspec'
pod 'Google-Mobile-Ads-SDK'
pod 'React-callinvoker', :path => "../node_modules/react-native/ReactCommon/callinvoker"

flipper_pods()
pod 'BVLinearGradient', :path => '../node_modules/react-native-linear-gradient'

pod 'FBReactNativeSpec', :path => "../node_modules/react-native/React/FBReactNativeSpec"

pod 'react-native-image-picker', :path => '../node_modules/react-native-image-picker'

post_install do |installer|
flipper_post_install(installer)
end
target 'ExampleTests' do
inherit! :search_paths
# Pods for testing
end

use_native_modules!
end

[marcosrdz]

Getting the same with RN 0.65

[wjaykim]

For me, use_flipper!({ "Flipper-DoubleConversion" => "1.1.7" }) in Podfile fixed this.

[hahtml]

Same here

[fiznool]

The duplicate symbol message appears too when building on RN 0.66, but it doesn't cause the build to fail.

From the build logs:

▸ Running script '[CP] Check Pods Manifest.lock'
▸ Linking MyApp\
⚠️  ld: duplicate symbol 'folly::detail::str_to_bool(folly::Range<char const*>*)' in:
⚠️  ld: duplicate symbol 'folly::makeConversionError(folly::ConversionCode, folly::Range<char const*>)' in:
⚠️  ld: duplicate symbol 'folly::exception_wrapper::from_exception_ptr(std::exception_ptr&&)' in:
⚠️  ld: duplicate symbol 'folly::exception_wrapper::from_exception_ptr(std::exception_ptr const&)' in:
⚠️  ld: duplicate symbol 'folly::exception_wrapper::onNoExceptionError(char const*)' in:
⚠️  ld: duplicate symbol 'folly::exceptionStr(folly::exception_wrapper const&)' in:
⚠️  ld: duplicate symbol 'folly::exception_wrapper::uninit_' in:
⚠️  ld: duplicate symbol 'folly::exception_wrapper::ExceptionPtr::ops_' in:
⚠️  ld: duplicate symbol 'folly::exception_wrapper::SharedPtr::ops_' in:
▸ Running script 'Bundle React Native code and images'
    the transform cache was reset.

[akinncar]

Still having this error with React Native 0.66.1

For me, use_flipper!({ "Flipper-DoubleConversion" => "1.1.7" }) in Podfile fixed this.

This solves here

Installing Flipper-DoubleConversion 1.1.7 (was 3.1.7)

[jefawks3]

After upgrading XCode & RN I got the same error. I'm not sure if my project settings are different than @fiznool which is why I'm getting an error and not a warning, but @wjaykim fix worked for me as well.

React 17.0.2
React-Native 0.66.3
XCode 13.1

[tscharke]

Get the same error with React-Native 0.66.3 and the tipp…

For me, use_flipper!({ "Flipper-DoubleConversion" => "1.1.7" }) in Podfile fixed this.

from @wjaykim solved it.
😎🙏

[mikehardy]

Apparently altering DEAD_CODE_STRIPPING setting (to either remove a 'NO' setting from pbxproj.proj, or add a 'YES' value for this setting) will resolve this. Experimental results from people that test this would be welcome.

https://stackoverflow.com/a/69565059/9910298

[alfonsojbro]

Apparently altering DEAD_CODE_STRIPPING setting (to either remove a 'NO' setting from pbxproj.proj, or add a 'YES' value for this setting) will resolve this. Experimental results from people that test this would be welcome.

https://stackoverflow.com/a/69565059/9910298

Worked for me! Thanks

[chrisheninger]

Apparently altering DEAD_CODE_STRIPPING setting (to either remove a 'NO' setting from pbxproj.proj, or add a 'YES' value for this setting) will resolve this. Experimental results from people that test this would be welcome.

Setting the debug value to "YES" resolved this issue for me.

Thanks @mikehardy – you're in a bunch of the troubleshooting threads I come across and you seem to always have the answer along with an explanation. Much appreciated as always! 🙇