Attempt to CALL libRed from Rebol 2

libred.test.r

#!/usr/local/bin/rebview -iqvs

Rebol [
    Title: "libRed Test"
    Author: "Christopher Ross-Gill"
    Date: 19-Dec-2018
]

libred: make object! [
    library: load/library %libRed.dylib

    ; from Ruby example:
    ; attach_function :redOpen, [], :void
    ; attach_function :redClose, [], :void
    ; attach_function :redDo, [ :string ], :pointer

    open: make routine! [
        return: [char]
    ] library "redOpen"

    close: make routine! [
        return: [char]
    ] library "redClose"

    do: make routine! [
        source [string!] return: [integer!]
    ] library "redDo"
]

libred/open
libred/do "print {Hello Rebol 2, I'm Red}"
libred/close

libRed description here: https://github.com/red/red/wiki/%5BDOC%5D-libRed