** Work in Progress ** # CMUCL 21d The CMUCL project is pleased to announce the release of CMUCL 21c. This is a major release which contains numerous enhancements and bug fixes from the 21a release. CMUCL is a free, high performance implementation of the Common Lisp programming language which runs on most major Unix platforms. It mainly conforms to the ANSI Common Lisp standard. CMUCL provides a sophisticated native code compiler; a powerful foreign function interface; an implementation of CLOS, the Common Lisp Object System, which includes multi-methods and a meta-object protocol; a source-level debugger and code profiler; and an Emacs-like editor implemented in Common Lisp. CMUCL is maintained by a team of volunteers collaborating over the Internet, and is mostly in the public domain. ## New in this release: * Known issues: * Feature enhancements * Update to ASDF 3.3.1, fixing issues introduced in 3.3.0 * Changes * ANSI compliance fixes: * Bug fixes: * Gitlab tickets: * Other changes: * Improvements to the PCL implementation of CLOS: * Changes to building procedure: This release is not binary compatible with code compiled using CMUCL 21c; you will need to recompile FASL files. See http://www.cmucl.org or https://gitlab.common-lisp.net/cmucl/cmucl for more information, See https://gitlab.common-lisp.net/cmucl/cmucl/wikis/GettingCmucl for obtaining CMUCL, including sources and binaries.. We hope you enjoy using this release of CMUCL!