I am trying to update ASDF in CLISP 2.49 (on Mac OS Sierra) to version 3.x.
I have now version 2.26 of ASDF.
I have tried everything I found online: I downloaded the latest version of ASDF as indicated in https://common-lisp.net/project/asdf/ but then when I eval (require "asdf"), as indicated in the manual (https://common-lisp.net/project/asdf/asdf.html#Upgrading-ASDF) nothing happens, I still have version 2.26.
The manual also tells to load the file asdf.lisp, but the file is missing from the new version folder.
I discovered that quicklisp had its own version of asdf.lisp and asdf.fas, which seem to be the ones being loaded, but I don't see how to replace them with any new version.
I have tried so many things now that I'm afraid I'm screwing the system up.
Does anyone know how to upgrade ASDF to a version >= 3.0 reliably and step by step? Thanks a lot.