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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/3.0/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.