Show how to call a function in a shared library (without dynamically linking to it at compile-time). In particular, show how to call the shared library function if the library is available, otherwise use an internal equivalent function.

This is a special case of calling a foreign language function where the focus is close to the ABI level and not at the normal API level.



Related task

 OpenGL -- OpenGL is usually maintained as a shared library.


getCurlVersion: function [][
    try? [
        call.external:'curl "curl_version" .expect: :string []
    ]
    else [
        "library not found"
    ]
]
 
print ["curl version:" getCurlVersion]