title: Xcode mach -o linker
body: <p>When i am trying to compile my project with NMSSH framework, XCode 5 says:<br>
  <code>Undefined symbols for architecture i386:<br>
  "_OBJC_CLASS_$_NMSSHSession", referenced from: objc-class-ref in HelloWorldViewController.o
  ld: symbol(s) not found for architecture i386
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></p>
  
  <p>What should I do?</p>