[prakashk]

No need for a separate preprocessor. org-mode offers org-babel which enables you to practice "literate programming" to create your init file, where you interleave text and code.

Here's are couple of examples: https://github.com/howardabrams/dot-files/blob/master/emacs....

https://raw.githubusercontent.com/sachac/.emacs.d/gh-pages/S...

Also see: http://howardism.org/Technical/Emacs/literate-programming-tu...