I'm trying to get an OCaml environment set up, and I've followed the instructions from appendix A of the Real World OCaml beta. I set up opam, and installed a version of OCaml with the command
$ opam switch 4.01.0dev+trunk
which passed fine. I then did an
$ eval `opam config env`
to pull in the changes. I'm running the correct top level, as
$ which ocaml
outputs
/home/bryan/.opam/4.01.0dev+trunk/bin/ocaml
I installed the Core package from Jane street, with the command
$ opam install core
Both ocamlfind and opam search show that the package was installed correctly. However when I try to open it either from the repl or in a file, I get the error 'unbound module Core'. e.g.
$ ocaml
# open Core;;
Error: Unbound module Core
Is there something I'm missing here? Why can't OCaml find my installed module?
So I jumped the gun a bit. I forgot to add some items to my ~/.ocamlinit file. Specifically I forgot to add
#use "topfind"
#camlp4o
#thread
#require "core.top"
#require "core.syntax"
as mentioned in Chapter 1. D'oh!