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

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.