Compiling my main target (not a test target like here) yields this error:
ld: warning: Auto-Linking supplied
\'~/Documents/my_app/MyApp/Crashlytics.frame
I followed all steps provided by @i'L'i but I was not able to find Crashlytics.framework and Fabric.framework file in build phases.
So this helped me.
Step 1: Follow all the steps given Here.
Step 2: Now when you are unable to find Crashlytics.framework and Fabric.framework files in Link Binary With Libraries by clicking + do following.
2.1: Click on + button in Link Binary With Libraries.
2.2: Click on Add Other... button.
2.3: Now chose Crashlytic.framework and Fabric.framework from Pod folder - if using cocoapods, else choose both file from where you have downloaded it.
Step 3: Build Succeeded, Enjoy. :)