let closed_xml = runtime_base_dir ^ "/closed.xml"
let gtkmathview_conf = runtime_base_dir ^ "/gtkmathview.matita.conf.xml"
let stdlib_dir_devel = runtime_base_dir ^ "/library"
let closed_xml = runtime_base_dir ^ "/closed.xml"
let gtkmathview_conf = runtime_base_dir ^ "/gtkmathview.matita.conf.xml"
let stdlib_dir_devel = runtime_base_dir ^ "/library"