On Oct 21, 2009, at 8:29 AM, Yoonseok Ko wrote:

> I'm looking for a C preprocessing language parser with OCAML  
> interface.

I was recently looking for such a tool myself, and I came across the  
link below mentioning Yacfe, from about a year ago. Unfortunately, it  
seems that the link provided there isn't working.
http://www.mail-archive.com/caml-list@yquem.inria.fr/msg01850.html

However, the project from which Yacfe was extracted, http://coccinelle.lip6.fr/ 
, is accessible. There might be something useful there.

-Elnatan