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Use llvm/clang trunk with XCode 4.3
1 https://github.com/mxcl/homebrew/wiki/installation 1 ''brew install --HEAD --with-clang --analyzer --rtti --jit llvm'' 1 Create a User-Defined variable in your Xcode project 1 Variable name: CC 1 Value: /usr/local/bin/clang 1 Enjoy!