Apple Mach -O Linker command failed

Question

After updating my POD install, Xcode sprouted a new issue:

Answer 1

Make sure you open the .xcworkspace file rather than the project file (.xcodeproj) when working with pods. That should solve the issue with linking.

Answer 2

I have no clue why the error occurred in my case, I was reusing some code from another project I created a while ago and after I adapted the code, then I always got the "Apple Mach -O Linker command failed"- Message. My best guess is, that it happened because I created/deleted some files from the project.

The thing that solved it for me was this:

• Create a new Project
• copy all the necessary files from the old project to the new one (Drag and Drop, don't forget the "Copy if needed" Checkbox)
• Build and see that it works

Sounds stupid and I have no idea why, but it worked.

Answer 3

I experienced the error when overwriting project.

Still encountered the error after:

• Changing the clang settings

• ionic cordova platform remove ios rather than just delete ios platform folder before each new build (and of course add the platform again)

• updating ruby as per instructions: https://forum.ionicframework.com/t/x-code-8-beta-2-apple-mach-o-linker-id-error/71998

Error was solved after changing to a different branch in github but perhaps one of the other troubleshooting methods played a part. Now all branches run on xcode without the Mach -O Linker Error.

Answer 4

the solution for me was open the .xcworkspace file insted of .xcodeproj located inside my '/platforms/ios' folder.