libconfig-file-ocaml-dev 1.2-1build3 (arm64 binary) in ubuntu bionic

 Config_file is an OCaml library used to manage the configuration
 file(s) of an application. You simply define your options and it
 performs the loading and saving of the options. Each option is
 defined from an option class (for example an "int" option) or from a
 combination of classes (for example to create "list of int" options).