;; These two instructions will produce statically and dynamically linkable object files "directory-tree.o" and "directory-tree.so" respectively.
(compile -s -O3 -d1 directory-tree.scm -j directory-tree)
(compile -s directory-tree.import.scm -O3 -d0)

(install-extension
 ;; Name of your extension:
 'directory-tree
 ;; Files to install for your extension:
 '("directory-tree.so" "directory-tree.import.so")
 ;; Assoc list with properties for your extension:
 '((version "1.0")))