It provides an interactive environment including an integrated native compiler, a debugger, and many extensions.

SBCL runs on various POSIX platforms and is still experimented on Windows.

What's New in This Release: [ read full changelog ]

· New port: support added for x86-64 NetBSD.
· Improvement: support O_LARGEFILE access to files larger than 2GB on x86-64/linux. (thanks to Daniel Janus; launchpad bug #453080)
· New feature: SB-INTROSPECT:WHO-SPECIALIZES-DIRECTLY to get a list of definitions for methods specializing on the passed class itself.
· New feature: SB-INTROSPECT:WHO-SPECIALIZES-GENERALLY to get a list of definitions for methods specializing on the passed class itself, or on subclasses of it.
· New build flag: :sb-xref-for-internals; SBCL will collect xref information about itself during the build (e.g. for M-? in Slime), if this flag is in customize-target-features.lisp. This will increase the core by about 5-6mb, though, so it's mostly interesting to SBCL
· developers.