title: Use gcc 4.2 in Xcode 4.2 and iOS SDK 5.0
body: <p>I just upgraded to Xcode 4.2 and iOS SDK 5 earlier today. But everything seems different with new compilers.</p>
  
  <p>There are two "Compiler for C/C++/Objective-C" options now, "Apple LLVM compiler 3.0" and "LLVM GCC 4.2". GCC 4.2 is missing.</p>
  
  <p>Apple LLVM compiler 3.0, builds really fast(I like that), gives me 999+ warnings, and my game can no longer run. It looks like there's some differences on memory, and it crashes when loading our game's scripts.</p>
  
  <p>LLVM GCC 4.2 is so god damn slow, I still cannot finish one build after hours on my i7 machine.</p>
  
  <p>And, one more thing is our engine uses gcc command lines to build(instead of xcode). </p>
  
  <p>So, it leads to one question, <strong>how can I use gcc 4.2 in Xcode 4.2</strong>? Is that even possible?</p>