Can't install Orange: “error: command 'clang' failed with exit status 1”

Question

I am trying to install Orange on my Mac OS X 10.7.3 (Lion) and I keep getting an error when using either pip or building from source. First, I was getting an error that read

Answer 1

Problem solved: Xcode 4 doesn't actually come with gcc-4.2; it comes with the new LLVM compilers.

It was just a matter of doing:

export CC=llvm-gcc-4.2
export CXX=llvm-g++-4.2

then building Orange.