Warning: This is the manual of the legacy Guile 2.2 series. You may want to read the manual of the current stable series instead.

2.5.3 Putting Extensions into Modules

In addition to Scheme code you can also put things that are defined in C into a module.

You do this by writing a small Scheme file that defines the module and call load-extension directly in the body of the module.

$ cat /usr/local/share/guile/site/math/bessel.scm

(define-module (math bessel)
  #:export (j0))

(load-extension "libguile-bessel" "init_bessel")

$ file /usr/local/lib/guile/2.2/extensions/libguile-bessel.so
… ELF 32-bit LSB shared object …
$ guile
scheme@(guile-user)> (use-modules (math bessel))
scheme@(guile-user)> (j0 2)
$1 = 0.223890779141236

See Modules and Extensions, for more information.