Firebase Xcode linker command error using Firebase Unity SDK

Question

Firebase Unity SDK 1.1.1. Unity 5.5.0p4 XCode 8.2.1

When using Authentication and Database from Firebase I get the following error when building the project in XCode

Answer 1

I had the same problem, after spend couple of hours i got the main problem.

It was the podfile library's defined specific version.

target 'Unity-iPhone' do
    pod 'Firebase/Auth', '4.10.0'
    pod 'Firebase/Core', '4.10.0'
end

When unity build iOS project's podfile they define their latest library version. But when from xcode/terminal try to update pod library from GIT and the specific version is not available then its failed to update and showing this error.

Solution is simple just don't need to define the specific version. pod will update the GIT's latest version.

target 'Unity-iPhone' do
    pod 'Firebase/Auth'
    pod 'Firebase/Core'
end

Answer 2

i had this issue and was fixed by updating the pods installation one way was clearing the locally cached copy and reinstall it again and another way was to force the installation to be from an online source

it worth mention that the building to IOS was succeeded

Build completed with a result of 'Succeeded'

but had an error installing the pods

Solution one

on the mac terminal change directory to the builded folder that should contain a Podfile

executed the following

$ pod repo remove master
$ pod install --repo-update

Rebuild the project from unity should install the pods automatically

Other solution

Installing from GitHub

see Firebase pods for more information

For releases starting with 5.0.0, the source for each release is also deployed to CocoaPods master and available via standard CocoaPods Podfile syntax.

These instructions can be used to access the Firebase repo at other branches, tags, or commits.

Background

See the Podfile Syntax Reference for instructions and options about overriding pod source locations.

Step-by-step Source Pod Installation Instructions

For iOS, copy a subset of the following lines to your Podfile:

pod 'Firebase' # To enable Firebase module, with `@import Firebase` support pod 'FirebaseCore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0' pod 'FirebaseAuth', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0' pod 'FirebaseDatabase', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0' pod 'FirebaseFirestore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0' pod 'FirebaseFunctions', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0' pod 'FirebaseMessaging', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0' pod 'FirebaseStorage', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0'

For macOS and tvOS, copy a subset of the following: pod 'FirebaseCore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0' pod 'FirebaseAuth', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0' pod 'FirebaseDatabase', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0' pod 'FirebaseStorage', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :tag => '5.0.0'

1- Make sure you have at least CocoaPods version 1.4.0 - pod --version.

2- Delete pods for any components you don't need, except FirebaseCore must always be included.

3- Update the tags to the latest Firebase release. See the release notes

4- Run pod update.