Configure HAIKU kernel

I was looking around the internet and also around the HAIKU documentation but could not find anything that tells me how to custom compile the HAIKU kernel.

Is it the same as Linux and BSD, where one downloads the source and creates a dir in their /home and start taking out things and putting them in? I know the editing of the kernel will be like BSD where its all manual text editing, but what commands are run after you are done configuring the kernel to your liking?