title: linker command failed with exit code 1 xcode4.5
body: <p>I updated my iphone4s and xcode to the latest yesterday. And I'm trying to debug my app on my phone since my application uses hardware communication. 
  I'm using a third party library from Redpark(the company provides Dock to RS232 wire.)
  While compiling, it gives an error </p>
  
  <pre><code>ld: file is universal (2 slices) but does not contain a(n) armv7s slice:/Users/...../libRscMgrUniv.a for architecture armv7s
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>Does anyone know how to solve this except waiting for Redpark to update there library?</p>