Cmxs_format
type modname = string
type crcs = (modname * Digest.t option) list
type dynunit = {
dynu_name : modname;
dynu_crc : Digest.t;
dynu_imports_cmi : crcs;
dynu_imports_cmx : crcs;
dynu_defines : string list;
}
type dynheader = {
dynu_magic : string;
dynu_units : dynunit list;