react-native: React Native cant find RCTEventEmitter after cocoapods integration

Upgraded to .43 and now get this error

Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_RCTReconnectingWebSocket", referenced from:
      objc-class-ref in libReact.a(RCTPackagerClient.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Hi there! This issue is being closed because it has been inactive for a while. Maybe the issue has been fixed in a recent release, or perhaps it is not affecting a lot of people. Either way, we’re automatically closing issues after a period of inactivity. Please do not take it personally!

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I had the same issue as @topher in “Debug” build configuration. It turned out when moving my project to a pod configuration, a “libReact.a” was left in another directory that was in the library path and being picked up by the linker (i.e. there were two libReact.a files, and the wrong one was being linked to). Since I didn’t do a Product -> Clean before I updated my project with cocoa pods it was still there. I found it by looking at the paths used in the link error message and looking for a libReact.a with an out of date timestamp.

find /Users/[myuser]/Library/Developer/Xcode/DerivedData/[myproject]-[somehashything]/ -name “libReact.a” -ls

Where […] are specific to my computer, but that is where Xcode putting this stuff. You can probably blow away that whole directory and let XCode rebuild as well.

@charlle that could be it. I haven’t had the issue for a while. Here is my current Podfile

Current Podfile

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

After struggling with this error and similar ones, I decided to clear out my Libraries folder in my xcode project by moving everything I could with a .podspec to cocoapods.

Since then, I’ve rarely had issues. If you haven’t strongly recommend using cocoapods / when building on ios and wish I had decided to earlier.

Also might may help are: (in no particular order)

• cleaning xcode under Product menu cmd + K

• clearing rm ios/build/*

• react-native unlink

• src/ios $ pod clean && pod deintegrate && pod install

@topher you find a solution for this issue? @hramos not sure why this issue is closed. it’s still exists.

I hade the same issue as @gaberudy and @topher, specifically for the Debug configuration.

@gaberudy’s approach worked for me.

Pro-tip: open xcode and press CMD+SHIFT+ALT+K to clean the the build folder (= DerivedData/yourproject)

I getting a same issue, but this bug occurs only in debug build.

RN .0.43 Cocoapods: 1.2.0

"_OBJC_CLASS_$_RCTLinkingManager", referenced from:
    objc-class-ref in AppDelegate.o

"_OBJC_CLASS_$_RCTPushNotificationManager", referenced from:
    objc-class-ref in AppDelegate.o

"_OBJC_CLASS_$_RCTReconnectingWebSocket", referenced from:
    objc-class-ref in libReact.a(RCTPackagerClient.o)

ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)