gistfile1.txt

#!/usr/local/bin/ocaml

let toplevel = Sys.getenv "OCAML_TOPLEVEL_PATH"
;;
print_endline toplevel
;;

let topfind = open_in (Filename.concat toplevel "topfind")
;;

print_endline (input_line topfind)

;;

close_in topfind
;;
#use "topfind"
#require "unix"

---------------------------------------------------------------------

# ./ocaml_script.sh   
/root/.opam/system/lib/toplevel
(* $Id: topfind_rd1.p 178 2012-07-09 09:20:31Z gerd $ -*- tuareg -*- *)
Cannot find file topfind.
Unknown directive `require'.