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Most recent Lisp implementations include a copy of ASDF 3,
or at least ASDF 2.
You can usually load this copy using Common Lisp’s require
function.1
(require "asdf")
As of the writing of this manual, the following implementations provide ASDF 3 this way: ABCL, Allegro CL, Clozure CL, CMUCL, ECL, GNU CLISP, MKCL, SBCL. The following implementations only provide ASDF 2: LispWorks, mocl, XCL. The following implementations don’t provide ASDF: Corman CL, GCL, Genera, MCL, SCL. The latter implementations are not actively maintained; if some of them are ever released again, they probably will include ASDF 3.
If the implementation you are using doesn’t provide ASDF 2 or ASDF 3, see see Loading ASDF from source below. If that implementation is still actively maintained, you may also send a bug report to your Lisp vendor and complain about their failing to provide ASDF.
NB: all implementations except GNU CLISP also accept
(require "ASDF")
, (require 'asdf)
and (require :asdf)
.
For portability’s sake, you should use (require "asdf")
.