Could not find or use auto-linked library '..." after installing react-native-fbsdk

Question

I am trying to install react-native-fbsdk via npm, and whereas my build worked perfectly before, once I install the library and install pods, I get the following error:

ld: warning: Could not find or use auto-linked library 'swiftCoreFoundation'
ld: warning: Could not find or use auto-linked library 'swiftCompatibility50'
ld: warning: Could not find or use auto-linked library 'swiftObjectiveC'
ld: warning: Could not find or use auto-linked library 'swiftFoundation'
ld: warning: Could not find or use auto-linked library 'swiftsimd'
ld: warning: Could not find or use auto-linked library 'swiftDarwin'
ld: warning: Could not find or use auto-linked library 'swiftUIKit'
ld: warning: Could not find or use auto-linked library 'swiftCore'
ld: warning: Could not find or use auto-linked library 'swiftQuartzCore'
ld: warning: Could not find or use auto-linked library 'swiftCoreGraphics'
ld: warning: Could not find or use auto-linked library 'swiftPhotos'
ld: warning: Could not find or use auto-linked library 'swiftSwiftOnoneSupport'
ld: warning: Could not find or use auto-linked library 'swiftCoreImage'
ld: warning: Could not find or use auto-linked library 'swiftCompatibilityDynamicReplacements'
ld: warning: Could not find or use auto-linked library 'swiftMetal'
ld: warning: Could not find or use auto-linked library 'swiftDispatch'
ld: warning: Could not find or use auto-linked library 'swiftAVFoundation'
ld: warning: Could not find or use auto-linked library 'swiftCoreMedia'
ld: warning: Could not find or use auto-linked library 'swiftCoreAudio'
ld: warning: Could not find or use auto-linked library 'swiftCoreMIDI'
ld: warning: Could not find or use auto-linked library 'swiftCoreLocation'
Undefined symbols for architecture x86_64:
  "protocol descriptor for Foundation.CustomNSError", referenced from:
      protocol conformance descriptor for __C_Synthesized.related decl 'e' for FBSDKLoginError : Foundation.CustomNSError in __C_Synthesized in libFBSDKLoginKit.a(LoginManager.o)
  "method descriptor for static Foundation.CustomNSError.errorDomain.getter : Swift.String", referenced from:
      protocol conformance descriptor for __C_Synthesized.related decl 'e' for FBSDKLoginError : Foundation.CustomNSError in __C_Synthesized in libFBSDKLoginKit.a(LoginManager.o)
  "method descriptor for Foundation.CustomNSError.errorUserInfo.getter : [Swift.String : Any]", referenced from:
      protocol conformance descriptor for __C_Synthesized.related decl 'e' for FBSDKLoginError : Foundation.CustomNSError in __C_Synthesized in libFBSDKLoginKit.a(LoginManager.o)
  "method descriptor for Foundation.CustomNSError.errorCode.getter : Swift.Int", referenced from:
      protocol conformance descriptor for __C_Synthesized.related decl 'e' for FBSDKLoginError : Foundation.CustomNSError in __C_Synthesized in libFBSDKLoginKit.a(LoginManager.o)
  "base conformance descriptor for Foundation.CustomNSError: Swift.Error", referenced from:
      protocol conformance descriptor for __C_Synthesized.related decl 'e' for FBSDKLoginError : Foundation.CustomNSError in __C_Synthesized in libFBSDKLoginKit.a(LoginManager.o)
  "protocol descriptor for Foundation._ErrorCodeProtocol", referenced from:

... etc

I've searched everywhere for a solution to this problem and I am not seeing how to solve this library issue.

I am on React Native .60.5 - is there any solution for this problem?

Answer 1

To resolve this problem you just need to add swift file and ** "Create Bridging Header"** in your Xcode project.

• open Xcode and under you project select New file and select swift file
• now clean your build and make new build.

Or you can see bellow link to understand this so well

Why linker link static libraries with errors? iOS

Answer 2

I fixed this by adding a .swift file via xcode

1. open XCode project
2. create new file, select swift file
3. confirm "Create Bridging Header"
4. clean
5. build

I tried a few combinations of these steps but found I needed all of them (ie. it must be done via xcode, you do need the bridging header, and you do need to clean the build folder).