Generate an AST into XML using LibcLang from C source code

I need to parse some old C code. I want to break it up and study it using libclang, which can retrieve the AST tree. What I need is a C++ project that includes libclang and any other dependencies, parses an input file, retrieves the AST tree and generates that tree in XML. From what I've read libclang has all the tools to do this so it should be a matter of making the API calls and insuring that the dependencies are in place.