Apple Mach -O Linker command failed

Question

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

Answer 1

I got same error like duplication of "variable name". You need to check all variable and function name for all .m file and make sure it's not same in any other file.Then clean and build.

It's working for me.

Answer 2

First thing you have to do is to delete the files in /Users/Yourname/Library/Developer/Xcode/DerivedData/YourAppName-xxxx and then restart your Xcode. That is no joke!

If you got an error like "duplicate symbol_OBJC_CLASS_$_Pod in:", you should go to TARGETS->Build Phases->Compile Sources and delete extra file.

Answer 3

You have to check Link Binary With Libraries option. Sometimes you build pod that is not in your project anymore.

On the left panel click on your project name, then under Targets again (click on name), then Build Phases > Link Binary With Files. Delete everything that you dont use.

Answer 4

I am using XCode for compiling ionic 3 app.

cli packages: (/usr/local/lib/node_modules)

    @ionic/cli-utils  : 1.10.1
    ionic (Ionic CLI) : 3.10.1

global packages:

    Cordova CLI : 7.0.1 

local packages:

    @ionic/app-scripts : 2.1.4
    Cordova Platforms  : android 6.2.3 ios 4.5.0
    Ionic Framework    : ionic-angular 3.6.0

System:

    ios-sim : 5.0.8 
    Node    : v8.4.0
    npm     : 5.4.0 
    OS      : OS X Yosemite
    Xcode   : Xcode 7.2 Build version 7C68 

There was not write permission in most of the file of ios, which was main issue.
I just changed the permission of ios file and got issue resolved by using command.

sudo chmod -R 775 platforms/ios/ 

Worked great.

Answer 5

Some times you need just clean build. It helped me. To clean build go Product -> Clean

Answer 6

Remove the local files of WikitudeSDK from target. Xcode is getting confused between the paths of library, which one to chose- pod or local.

Also try reinstalling podfile and remove wikitude from pod file to. IN linker search path settings, in build settings, check the paths mentioned to find the required library.

Lastly install gems before updating pods