"Use of undeclared identifier '__BYTE_ORDER' " error after updating pod

Question

Getting these two errors, after updating pods:

Use of undeclared identifier '__BYTE_ORDER'
Use of undeclared identifier '__LITTLE_ENDIAN'

Using Xcode Version 11.2.1 (11B53)

Answer 1

Well, I have solved my problem. I have done the following steps:

1) Uninstall pod:
To remove pods from a project completely you need to install two things.

a) Cocoapods-Deintegrate Plugin
b) Cocoapods-Clean Plugin

To install those, open your terminal and type

sudo gem install cocoapods-deintegrate

(Press enter)

sudo gem install cocoapods-clean

Now go to your project directory by typing this on your terminal

cd (path of the project) //Remove the braces after cd

Then press enter and type

pod deintegrate

to deintegrate pod. Then type

pod cache clean --all

to clean the cache. Now type

pod clean

to clean pod directory.

After completing the above tasks there should be the Podfile still remaining on your project directory. Just delete that manually or use this following command on the terminal.

rm Podfile

Then delete the DerivedData from Xcode by typing

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

Or follow the link to delete it manually.

Now remove Cocoapods from the system

sudo gem uninstall cocoapods

That's it. Now you have your project free from Pods & Cleaned.

2) Install pod:
After that, install a fresh pod to your project by following:

sudo gem install -n /usr/local/bin cocoapods

For MacOS, Catalina

sudo gem install -n /usr/local/bin cocoapods -v 1.8.4

Latest CocoaPods 1.10.0 seem not working. More info is here. Then give your project path

cd /your project path 

Now type

pod setup

Init the Pod

pod init

Open Pod file and add Pod list into it
For example

pod 'Firebase/Analytics'
pod 'Firebase/Auth'
pod 'Firebase/Firestore'

Then install those pods.

pod install

Now open your-project.xcworkspace. The errors should be gone.
Thanks

Answer 2

A clean installation of Firebase pods worked for me:

1) Comment out or temporarily remove all Firebase related pods from the Podfile

2) Update pods - this will remove all previously installed pods - run:

pod update

3) Uncomment or add back the Firebase related pods and run 'pod update' to install them.