llvm!

gistfile1.txt

#!/bin/sh
cores=`sysctl -n machdep.cpu.core_count`
cores=`jstalk -e "$cores * 4"`

rm -rf /tmp/llvm
cd /tmp/
svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
cd llvm/tools
svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
cd .. 
./configure --prefix=/opt --enable-optimized
make -j$cores && sudo make install