title: 'libxml/xmlversion.h' file not found in xcode 4.2?
body: <p>i am integrating twitter application in my application my application is created in <code>xcode 4.2</code> using ARC when i implemented code for twitter <a href="http://mobile.tutsplus.com/tutorials/iphone/twitter-api-iphone/" rel="nofollow noreferrer">from this code.</a>
  it worked perfectly when i just download the project &amp; run it. when i integrate this twitter sdk code in my <code>xcode 4.2</code> based application it gave me error of <code>'libxml/xmlreader.h' file not found</code> i have solved it just changing header file this way <code>#include &lt;libxml2/libxml/xmlreader.h&gt;</code> but after changing this previous error was solved but than i got new error <code>'libxml/xmlversion.h' file not found</code>. i tried to change header of file <code>xmlreader.h</code> but this file is not editable i have changed permissions for this file, too. but it didn't work. in the format like this <code>#include &lt;libxml2/libxml/xmlreader.h&gt;</code> but it doesn't work.</p>
  
  <p>please tell me how to solve this error.</p>
  
  <p><a href="https://stackoverflow.com/questions/6592193/how-to-solve-libxml-xmlreader-h-not-found-error-in-twitter-integration-in-ipho">i have seen several question in stack overflow for some that kind of question</a></p>
  
  <p>but they didn't work for me in xcode 4.2.
  please guide me.</p>