title: How to update our static library architecture for suporting arm64 Build?
body: <p>Few days ago i create <strong>static-library (Universal)</strong> that work's fine with <code>Xcode5.0 SDK7</code>. After Update <code>Xcode5.1</code> with <code>SDK7.1</code> that not work if i select simulator <code>iPhone Retina(4-inch 64-bit)</code>. Then i am going to update my lib with Bellow setting change.</p>
  
  <p><img src="https://i.stack.imgur.com/63tiz.png" alt="enter image description here"></p>
  
  <p>I do the same for three Target:-</p>
  
  <p><img src="https://i.stack.imgur.com/sLqcB.png" alt="enter image description here"></p>
  
  <p>For sporting simulator as well as device i put Universal lib and in to this i run script this:-
  <img src="https://i.stack.imgur.com/QhFia.png" alt="enter image description here"></p>
  
  <p>After this i Build Again lib and used as i done Before in to my project. But still getting same issue with <code>iPhone Retina(4-inch 64-bit)</code> <code>Undefined symbols for architecture x86_64:</code></p>
  
  <hr>
  
  <p>So, My question is that is there any additional change required for updating lib for <a href="/questions/tagged/arm64" class="post-tag" title="show questions tagged &#39;arm64&#39;" rel="tag">arm64</a> or i did any mistake in above step. Please current me if i am wrong. </p>
  
  <p>what change needed for update my static-library for supporting <code>64Bit architecture</code></p>
  
  <p><strong>NOTE:</strong></p>
  
  <p>I am asking for my own created Library Update. i am not using third-party Library.
  <strong>Update</strong></p>
  
  <p>I used this <code>lipo -info testingLibImport/libLibNSlog.a</code> command in to my Terminal that output is:</p>
  
  <pre><code>Architectures in the fat file: testingLibImport/libLibNSlog.a are: armv7 armv7s i386 arm64 
  </code></pre>