Bigarray, for use in I/O and C-bindings
float-based Time,
but representing a narrower range of times.
Time.t, i.e.
Command-based executables when called with the -version or -build-info flags
by $0 version (-build-info | -version) or $0 (-build-info | -version).
Here's how it works: we arrange for the build system to, at link time, include an
object file that defines symbols that version_util.ml uses to get the strings that
contain the information that this module provides.