Xcode 12: build Error on FIRAnalyticsConnector

Question

After upgrading to Xcode 12, my project doesn't build for the simulator anymore.

The error I get is:

ld: in ... /Pods/FirebaseAnalytics/Frameworks/FIRAnalyticsConnector.framework/FIRAnalyticsConnector(
FIRAnalyticsConnector_e321ed8e3db06efc9803f6c008e67a34.o), 
building for iOS Simulator, but linking in object file built for iOS, file
'.../Pods/FirebaseAnalytics/Frameworks/FIRAnalyticsConnector.framework/FIRAnalyticsConnector'
for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

A workaround is adding arm64 to my project > Build Settings > Excluded Architectures, but then it won't build for my real device.

I already tried cleaning the build folder, updating pod file, restarting etc.

I'm using:

• Firebase/Analytics (6.33.0)
• Xcode 12.0.1 (12A7300)
• CocoaPods: 1.9.3

Any ideas?

Answer 1

Ok, I finally found a fix for the issue.

Change "Build Active Architecture Only" to "Yes" also for "Release".
The setting can be found selecting your project > "Build Settings" > "Targets" (your target) > "Architectures"

Source and more elaborate explanation can be found here:
https://stackoverflow.com/a/64139830/4134160

Please note that the problem is not related to Firebase. I'll still leave it since it might lead others to this issue and help them to resolve this.

Apple M1

If you're running on an M1 chip, consider @Aspen's answer below: https://stackoverflow.com/a/65460729/4134160

Answer 2

After adding arm64 to Excluded Architectures for the main project AND for the Pods project, I was able to resolve this issue I ran into on an Apple M1.

I also had to clear the DerivedData folder and restart Xcode.

For more information, see: https://medium.com/@khushwanttanwar/xcode-12-compilation-errors-while-running-with-ios-14-simulators-5731c91326e9

Answer 3

I fixed the issue by running xcode12 under Rosetta (Apple M1).

Open Finder -> Application -> locate Xcode -> right click -> get info -> check open using rosetta.

then reopen xcode.

Answer 4

My case was a little different. According to this Firebase engineer,

FIRAnalyticsConnector is now part of the xcframework version of FirebaseAnalytics and isn't needed to link.

Going into the Targets Build Settings (not the Project), searching for Other Linker Flags, and then deleting FIRAnalyticsConnector from the list took care of the issue for me.

Interestingly, when I ran pod deintegrate and the pod install it did not fix this issue.