Compiling a linux-kernel

Hi to all.
I have built my linux kernel using GCC many times. However,it takes me three hours to build the whole thing with my AMD XP 2,000+ processor.

I am curious on how to build my kernel using Llvm-Clang instead. I want to know exactly how to do that(doing bzImage,make modules,make modules_install,make install)

I can invoke "/usr/bin/clang from the directory where the kernel I’m building is,but it doesn’t seem to do anything.

Any help would be greatly appreciated.