Where's the Unix library?

Learning
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1

I’m using ocaml 4.12.0 on a Mac, and the Unix standard library doesn’t appear to exist. For example, typing “Unix.time;;” to the prompt results in “Error: Reference to undefined global `Unix’”. Do I need to do something to load it?

2

If you are using dune, remember to add unix as a dependency. If you aren’t using dune make sure you add the UNIX.cma as described here: The Unix Module

1 Like
3

Yes: you can load it by passing the name of the .cma archive on the command line, eg: ocaml unix.cma.

Cheers,
Nicolas

4

Thank you. That solves the problem when I’m running ocaml interactively.

5

Thank you. That solves the problem when I’m compiling the ocaml program.

6

Interactively, you may also use the directive #load "unix.cma";; if you didn’t put it initially on the command line and don’t want to restart the toplevel.