Omod_support.ConfOmod configuration.
val v : ?cache:Omod.fpath -> ?libdir:Omod.fpath -> unit -> (t, string) resultv ~libdir ~cache () is a configuration with given cache and libdir. If unspecified they are discovered.
val cache : t -> Omod.fpathcache c is c's cache directory.
val libdir : t -> Omod.fpathlibdir c is c's library directory.
val pp : Format.formatter -> t -> unitpp formats configurations.
cache_env is the environment variable that can be used to define an cache directory.