Hi: While reading the kernel code 1. the huge amount of files make me scared there are too many alike functions in different files sometimes I can't figure out which one was really compiled 2. too many macros in the definition of a struct or functions declaration confused me a lot I tried to follow the generated file autoconf.h to guess the final face but it's really a difficult thing Is there a tool which can generate a small and simple source tree after config? not pre-processor just generate a small source tree contains the files and dirs which really will be compiled and no macros like CONFIG_SMP etc. according to the configuration or some other way to understand the architecture of the final working source tree? Thanks. -- 2011-10-23 jiangtao.jit