CMU Common Lisp 19d

CMU Common Lisp is a free implementation of the Common Lisp programming language which runs on most major Unix platforms. CMU Common Lisp project mainly conforms to the ANSI Common Lisp standard.
Main features:
- a sophisticated native-code compiler which is capable of powerful type inferences, and generates code competitive in speed with C compilers.
- generational garbage collection and multiprocessing capability on the x86 ports.
- a foreign function interface which allows interfacing with C code and system libraries, including shared libraries on most platforms, and direct access to Unix system calls.
- support for interprocess communication and remote procedure calls.
- an implementation of CLOS, the Common Lisp Object System, which includes multimethods and a metaobject protocol.
- a graphical source-level debugger using a Motif interface, and a code profiler.
- an interface to the X11 Window System (CLX), and a sophisticated graphical widget library (Garnet).
- programmer-extensible input and output streams.
- an Emacs-like editor implemented in Common Lisp.
- freely redistributable: free, with full source code (most of which is in the public domain) and no strings attached (and no warranty). Like the GNU/Linux and *BSD operating systems, CMUCL is maintained and improved by a team of volunteers collaborating over the Internet.
Common Lisp is well suited to large programming projects and explorative programming. The language has a dynamic semantics which distinguishes it from languages such as C and Ada.
It features automatic memory management, an interactive incremental development environment, a module system, a large number of powerful data structures, a large standard library of useful functions, a sophisticated object system supporting multiple inheritance and generic functions, an exception system, user-defined types and a macro system which allows programmers to extend the language.
Enhancements:
- A new float type EXT:DOUBLE-DOUBLE-FLOAT is supported.
- A DOUBLE-DOUBLE-FLOAT uses two DOUBLE-FLOATs to represent a number with >= 106 bits of precision (about 33 digits).
- Hash tables now support weak value, weak key- and-value, and weak key-or-value tables.
- LONG-LONG and UNSIGNED-LONG-LONG are recognized types in the C-CALL package for signed and unsigned 64-bit integers.
- The generational garbage collector has been ported to Darwin/ PPC.
- Numerous bugs and ANSI-compliance problems have been fixed.