help: clang&LLVM

Hi, I am new to LLVM&Clang.Now I’m confused by the unhelpful documentation online. What I’m expecting is to build my own bug checker using LLVM&Clang, but I haven’t got through how to start it, even what an programming environment I need.
Any help? Thanks.

Have you looked at this?
http://clang-analyzer.llvm.org/

thanks. I’ll have a look.