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2.5.2 Writing new Modules

You can create new modules using the syntactic form define-module. All definitions following this form until the next define-module are placed into the new module.

One module is usually placed into one file, and that file is installed in a location where Guile can automatically find it. The following session shows a simple example.

$ cat /usr/local/share/guile/site/foo/bar.scm

(define-module (foo bar)
  #:export (frob))

(define (frob x) (* 2 x))

$ guile
scheme@(guile-user)> (use-modules (foo bar))
scheme@(guile-user)> (frob 12)
$1 = 24

For more on how to install your module, see Installing Site Packages.