@page
@node Libguile Intro
@chapter Using Guile as an Extension Language

The chapters in this part of the manual explain how to use Guile as a
powerful application extension language.

The following chapter, ``GH: A Portable C to Scheme Interface,'' shows
how to call Guile from your application's C code, and how to add new
Scheme level procedures to Guile whose behaviour is specified by
application specific code written in C.  The Guile interface functions
documented in this chapter make up a high level, portable interface
which (we hope) will also someday work with other Scheme interpreters,
allowing you to write C code which will work with any of several Scheme
systems.

The portable interface is rich enough to support simple use of Guile as
an application extension language, but is limited by its own portability
where a deeper integration is desired between Guile and your
application's code.  The subsequent chapters therefore present aspects
of libguile that allow you to use more of Guile's C level features, and
to extend your application in more complex ways than is possible with
the portable interface.