I have a bog standard OCaml install, as in the Real World OCaml book.
I then installed OUnit (the unit testing framework) via opam with ‘opam install ounit’ which worked.
then I start utop and say
“open OUnit” and get an error “Error: Unbound module OUnit”
try installing ounit again, I get,
opam install ounit
[NOTE] Package ounit is already installed (current version is 2.0.8).
but utop doesn’t seem to able access it.
So as far as I can see opam is installing ounit somewhere, but otop doesn’t have it in its “searchpath”.
Do I need to explicitly set an environment variable, something like Java’s $CLASSPATH to tell programs (here utop) where to look for installed libraries?
I’m sure it is something very simple, but for the life of me, I can’t figure it out. Google isn’t much help, referring to ‘ocamlfind’ and so on as a part of building a project. I just want to load an installed library in the shell.
Thanks in advance,