title: Error in adding static libraries to ones project
body: <p>I'm trying to learn to create and use static libraries in my Xcode projects using <a href="http://www.icodeblog.com/2011/04/07/creating-static-libraries-for-ios/" rel="nofollow">this</a> example. However I keep geting this error: </p>
  
  <pre><code>ld: warning: ignoring file /Developer/MathTest/iCodeBlogsMathLibrary/libICodeMathUtils.a,    
  missing required architecture i386 in file
  Undefined symbols for architecture i386:
  "_OBJC_CLASS_$_MathFunctions", referenced from:
    objc-class-ref in MathTestViewController.o
  ld: symbol(s) not found for architecture i386
  collect2: ld returned 1 exit status
  </code></pre>
  
  <p>What might I be missing? </p>