title: How to check if a static library is built for 64-bit?
body: <p>I just built a static library for iOS with the build setting for Architectures set to <code>$(ARCHS_STANDARD_INCLUDING_64_BIT)</code>. </p>
  
  <p>I want to make sure that the .a library is properly including that architecture, but when i run <code>lipo -info</code> on it, I see:</p>
  
  <blockquote>
    <p>Architectures in the fat file: library.a are: armv7 armv7s
    (cputype (16777228) cpusubtype (0))</p>
  </blockquote>
  
  <p>Does this mean that arm64 isn't included? If the lipo command can't tell me, is there another way to tell?</p>
  
  <p>I'm running Xcode 5 with the latest Command Line Tools installed.</p>