ocaml unbound module after opam install

Question

Install the module bigstringaf following:

opam pin add -n bigstringaf .
opam install --deps-only bigstringaf
opam install bigstringaf

Then I tested it using make test and successed, but when I tried in ocaml, it failed. And I find the package using ocamlfind list

>ocaml
        OCaml version 4.09.0

# open Bigstringaf;;
Error: Unbound module Bigstringaf
# require "Bigstringaf";;
Error: Unbound value require

Answer 1

require is actually a toplevel command, meaning you need to write # before it. You also need to give it a package name which is different from the module name (in this case it's the same, just not capitalized).

# #require "bigstringaf";;
/home/oli/.opam/4.09.0/lib/bigarray-compat: added to search path
/home/oli/.opam/4.09.0/lib/bigarray-compat/bigarray_compat.cma: loaded
/home/oli/.opam/4.09.0/lib/bigstringaf: added to search path
/home/oli/.opam/4.09.0/lib/bigstringaf/bigstringaf.cma: loaded
# open Bigstringaf;;