Firebase Undefined symbols for architecture x86_64

Question

I am using firebase as part of a project I am working on in iOS, and I just stumbled upon the following linking error when I try to compile my code against an iPhone 6 or 7

Answer 1

If nothing is working for you then try downgrading firebase pods. I downgraded it to '6.27.0' and it worked like a charm. I read this solution here.

pod 'Firebase/Core', '6.27.0'

Answer 2

I got the same error when I integrated Firebase manually without using CocoaPod and built for simulator. (There is no problem just for device build.)

This is old question, but it's related, so I show my recent solution.

First, I gave up building for only simulator.

It takes too long time for building, but I set "Build Active Architecture Only" to "No" to build all the targets including simulator.

Also I added "Any iOS Simulator SDK - arm64" in "Excluded Architectures" in Build Settings, because my Mac OS architecture is not "arm64" but "x86_64".

If necessary, you should add "Any iOS Simulator SDK - i386" too. Firebase contains "i386" architectures, but some other Ad SDK doesn't support "i386" any more.

That's my acceptable solution.

Answer 3

Also had this issue...
Added $(inherited) to other linker flags in build settings and everything works fine now

Answer 4

Had the same problem, and for me the issue was that I had imported the FirebaseMessaging framework manually, by downloading the entire Firebase SDK and then manually importing the Messaging framework into the project (I didn't use Cocoapods or Carthage). I didn't import the other framework in the same folder, "Protobuf.framework". Once adding Protobuf and making sure the target memberships included my project target, it worked.

Answer 5

In my case, for using only Firebase Auth and Firebase Firestore, installing with Cocoapods, all I had to do was click the + sign for both Debug and Release sections under Other Linker Flags in Build Settings. The $(inherited) flag was added automatically. Built just fine after that!

Screenshot

Answer 6

I have tried all advices but only this one worked !!! My error was this after installing firebase pod :

Undefined symbols for architecture x86_64
error: linker command failed with exit code 1 (use -v to see invocation)

And here is the only solution worked for me:

pod deintegrate && pod cache clean --all

rm -rf ~/Library/Developer/Xcode/DerivedData

then add the below version of Firebase to your pod file

pod 'Firebase', '6.27.0'

and then

pod install