title: Apple Mach-O Linker Error during profile
body: <p>So I ran into this wierd issue where I am able to compile and run my iOS project in simulator with out any issues but when I ran it for profiling with instrument (cmd + I) I am getting Apple mach o linker error for one of the library. I tried it reading to project but it did not helped. I also checked my search paths which looks as following</p>
  
  <pre><code>Other Linker Flags: -ObjC -all_load
  Always Search User Paths: No
  Framework Search Paths:$(SRCROOT) recursive
  Library Search Paths:$(SRCROOT) recursive
  </code></pre>
  
  <p>I am getting following error message:</p>
  
  <pre><code>Undefined symbols for architecture i386:
  "_OBJC_CLASS_$_TestFlight", referenced from:
  objc-class-ref in AppDelegate.o
  ld: symbol(s) not found for architecture i386
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>Am I missing anything in my linking phase which causing this thing to happen ?</p>