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MIT/GNU Scheme

MIT/GNU Scheme is a part of the GNU project, and is hosted on Savannah.
MIT/GNU Scheme is free software licensed under the GNU General Public License.

Release status and future plans

Current releases
Snapshot
20080130

The releases provide binaries that run on x86 (Intel Architecture 32) machines under the following operating systems: GNU/Linux, Mac OS X, OpenBSD, and Windows (95, 98, ME, NT, 2000, XP, and Vista). We additionally provide binaries for selected other architectures and systems, depending on the hardware and software that is available to us. We no longer support OS/2, DOS, or Windows 3.x.

Recent release notes are here.

In the future, we plan to deploy a new portable virtual machine; provide a port to the x64 architecture; and implement a module system. We also plan to finish support for R5RS, but we will not be providing support for R6RS. Other potential projects can be found on the tasks page.

Download

MIT/GNU Scheme is available in binary form for a variety of systems. Note that most problems unpacking or installing this software are due to corrupted downloads, so please check the downloaded file for a correct MD5 checksum before submitting a bug report. Each distribution below has its own list of MD5 checksums.

Snapshot 20080130
File	Arch	Instructions	Notes
Packages: main, debug, doc	i386		For Debian GNU/Linux 4.0.
Packages: main, debug, doc	i386		For Ubuntu 7.10.
GNU/Linux binary	x86	unix installation	Compiled as native code on Debian GNU/Linux 3.1.
Mac OS X binary	x86	unix installation	Compiled as native code on Mac OS X 10.5.
Mac OS X binary	x64	unix installation	Compiled from portable C code on Mac OS X 10.5.
Windows binary	x86	Windows installation	Compiled on Windows XP using Open Watcom C/C++ 1.6.
Portable C	(any)	how to build	For use on any unix system.
Other unix	x86	how to build	For use on x86 running other unix.
Source (.tar.gz)			For unix systems; uses linefeeds as line delimiters.
Source (.zip)			For Windows and OS/2 systems; uses CR/LF pairs as line delimiters.
Change log
MD5 checksums

Older versions can be downloaded here.

Code for running MIT/GNU Scheme under GNU Emacs is here (or byte-compiled); this has been tested on GNU Emacs versions 20.7 and 21.1, and should replace the file of the same name included with Emacs; it won't work with Emacs 19 or earlier. This doesn't work on Windows or OS/2.

Note that you cannot build a working system from the source unless you have a working MIT/GNU Scheme compiler to do the compilation. (This doesn't apply to the portable C source, which requires only a C compiler.) This means that if the above binaries don't work on your system, it is pointless to try building a custom set of binaries from the source code.

Documentation

Documentation for MIT/GNU Scheme is available online in HTML and PDF formats:

Core documentation:
HTML	PDF	MIT/GNU Scheme Reference
HTML	PDF	MIT/GNU Scheme User's Manual
HTML	PDF	The SOS Reference Manual
HTML	PDF	IMAIL User's Manual
Supported SRFIs:
HTML		0: `cond-expand`
HTML		1: List library
HTML		2: `and-let*`
HTML		6: Basic string ports
HTML		8: `receive`
HTML		9: Defining record types
HTML		23: Error reporting mechanism
HTML		27: Sources of random bits
HTML		30: Nested multi-line comments
HTML		62: S-expression comments
HTML		69: Basic hash tables

Contact us

Please report bugs using the bug-tracking system.
We can be contacted on the mit-scheme-devel mailing list.
New releases of MIT/GNU Scheme Scheme are announced on the mit-scheme-announce mailing list.

Our more general Scheme page is http://swiss.csail.mit.edu/projects/scheme/.
Older releases can be found at http://swiss.csail.mit.edu/ftpdir/mit-scheme/.