title: '-print_statistics' linker option produces error in Xcode
body: <p>I want to profile linking phase of our big C++ project because it takes up to 30 minutes when linking iOS project using Xcode or <code>xcodebuild</code>.</p>
  
  <p><code>$ man ld</code> tells it's possible to use '-print_statistics' command line option. But setting this option through "Other Linker Flags" in Build Settings produces an error during <code>Ld</code>:</p>
  
  <p><code>clang: error: unknown argument: '-print_statistics'</code></p>
  
  <p>Looks like Xcode build system some how checks "Other Linker Flags" and does not recognize the '-print_statistics'.</p>