MIT/GNU Scheme

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MIT/GNU Scheme is an implementation of the Scheme programming language, providing an interpreter, compiler, source-code debugger, integrated Emacs-like editor, and a large runtime library. MIT/GNU Scheme is best suited to programming large applications with a rapid development cycle.

Release status and future plans

Current releases
Stable Testing
10.1.11 11.0.90

The releases provide binaries that run on i386, x86-64, and aarch64 machines running unix systems. They have been tested on GNU/Linux, NetBSD, and macOS systems. We no longer support OS/2, DOS, or Windows, though it's possible that this software could be used on Windows Subsystem for Linux (we haven't tried).

Recent release notes are here.

Other potential projects can be found on the tasks page.

Download

MIT/GNU Scheme is available in binary form for a variety of systems.

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.

Documentation for MIT/GNU Scheme is available online, as is documentation for most GNU software. The MIT/GNU Scheme documentation is available in HTML and PDF formats on this page, and in other formats as downloads.

Stable release 10.1.11
File Arch Instructions Notes
Unix binary i386 unix installation
Unix binary x86-64 unix installation
Portable SVM (any) unix installation For use on any 64-bit unix system.
macOS binary x86-64 Compiled on macOS 10.14.
Source (.tar.gz) For unix systems; uses linefeeds as line delimiters.
Change log
MD5 checksums
Documentation:
HTML (multi-page) PDF MIT/GNU Scheme User's Manual
HTML (multi-page) PDF MIT/GNU Scheme Reference
HTML (multi-page) PDF The FFI Reference Manual
HTML (multi-page) PDF The SOS Reference Manual
HTML (one page) PDF IMAIL User's Manual
HTML (one page) PDF MIT/GNU Scheme Blowfish Plugin Manual
HTML (one page) PDF MIT/GNU Scheme GDBM Plugin Manual
Testing release 11.0.90
File Arch Instructions Notes
Unix binary x86-64 unix installation
Unix binary aarch64le unix installation
Portable SVM (any) unix installation For use on any 64-bit unix system.
macOS binary x86-64 Compiled on macOS 10.15.
Source (.tar.gz) For unix systems; uses linefeeds as line delimiters.
Change log
MD5 checksums
Documentation:
HTML (one page) HTML (multi-page) PDF MIT/GNU Scheme User's Manual
HTML (one page) HTML (multi-page) PDF MIT/GNU Scheme Reference
HTML (one page) HTML (multi-page) PDF The FFI Reference Manual
HTML (one page) HTML (multi-page) PDF The SOS Reference Manual
HTML (one page) PDF IMAIL User's Manual
HTML (one page) PDF MIT/GNU Scheme Blowfish Plugin Manual
HTML (one page) PDF MIT/GNU Scheme GDBM Plugin Manual

Older versions can be downloaded here.

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.

Additional documentation

MIT/GNU Scheme mostly conforms to the R7RS (small) standard. It also fully supports these SRFIs:

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 14: Character-set Library
HTML 23: Error reporting mechanism
HTML 27: Sources of random bits
HTML 30: Nested multi-line comments
HTML 39: Parameter objects
HTML 62: S-expression comments
HTML 69: Basic hash tables
HTML 115: Scheme Regular Expressions
HTML 124: Ephemerons
HTML 125: Intermediate hash tables
HTML 128: Comparators (reduced)
HTML 131: ERR5RS Record Syntax (reduced)
HTML 133: Vector Library (R7RS-compatible)
HTML 143: Fixnums

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 are announced on the mit-scheme-announce mailing list.

Getting involved

Development of MIT/GNU Scheme, and GNU in general, is a volunteer effort, and you can contribute. For information, please read How to help GNU. If you'd like to get involved, it's a good idea to join the discussion mailing list (see above).

Development
For development sources, bug and patch trackers, and other information, please see the project page at Savannah.
Maintainer
MIT/GNU Scheme is currently being maintained by Chris Hanson. Please use the mailing lists for contact.

Licensing

MIT/GNU Scheme is free software; you can redistribute it and/or modify it under the terms of the GPL as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

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