title: Use of undeclared identifier assert Xcode
body: <p>I'm using Xcode 4.5 and LLVM 4.1 to compile some code I'm working on.</p>
  
  <p>The error I am getting repeatedly is:
  "error: use of undeclared identifier 'assert';</p>
  
  <p>The right includes are in the header (#include cassert (I have also tried #include assert.h) but no luck.</p>
  
  <p>Someone else has taken my exact code and compiled it on another computer running the same setup (Mac OSX 10.8, Xcode 4.5, LLVM 4.1).</p>