Ed Schouten started working on a FreeBSD – clang project. He did this by importing clang into a project repository and making sure that a ‘make buildkernel’ succeeds. (If I followed correctly). I believe this is one of the steps that he will be taking to get the LLVM compiler suitable for FreeBSD, and perhaps eventually replacing the GNU licensed gcc compiler. That (like his TTY work) would be one hell of a job! Please poke ed@FreeBSD.org if you are interested in helping!