http://people.csail.mit.edu/jaffer/SCM
	The SCM Implementation of Scheme
	Current Version Released Terms 5e5 2008-02-03 LGPL

SCM includes Hobbit, the Scheme-to-C compiler originally written by Tanel Tammet. Hobbit generates C files whose binaries can be dynamically or statically linked with a SCM executable. SCM includes linkable modules for sequence-comparison, arrays, records, and byte-number conversions; and modules for POSIX system calls and network-sockets, readline, ncurses, and Xlib.

On some platforms SCM supports unexec (developed for Emacs and bash), which dumps a executable image from a running SCM. This results in very low latency (12.ms) startup for SCM.

SCM supports the SLIB Scheme Library. Both SCM and SLIB are GNU packages.

News

• SCM is now a GNU package.
• SCM license is now LGPLv3.
• Documentation changed to GNU Free Documentation License.
• scm-discuss email group http://lists.gnu.org/mailman/listinfo/scm-discuss
• From Radey Shouman:

  repl.c (isymnames): Add name for IM_EVAL_VALUES.
  Fix igc prototype, avert warning.

  eval.c (scm_eval_values, ceval_1): Catch VALUES arity errors in top-level repl evaluations. Eg (list (values 1 2)) now throws an error even when typed to repl.

  scm.h (IM_EVAL_VALUES): Add isym for use by scm_eval_values.

• From Bob Schumaker:

  macos-config.h, unexmacosx.c, lastfile.c: Added from Emacs for MacOS (darwin).

  build.scm (C-libraries): Added dump and dlll darwin entries.
  (make-dll-archive, compile-dll-c-files): Added Darwin tagets.
  (manifest): Added entries for "macos-config.h" and "lastfile.c".

  Makefile (all): Make x.so only if /usr/X11R6/lib exists.
  (install, installlib): test -d is not needed with mkdir -p.

• Much more in SCM_ANNOUNCE.txt.

Quick Start

x86 MS-Windows

Obtain slib-3b1-1.exe (1.1.MB) and run.
Obtain scm-5e5-1.exe (475.kB) and run.
Release Notes:

• The Windows installers were packaged by the NSIS (Nullsoft Scriptable Install System).
• The SCM executable for MS-Windows was compiled by MinGw version 3.1.0
• SCM.EXE supports WB B-Tree Databases with SCM.

• The #! program implements "#!" (POSIX) shell-scripts for MS-DOS batch files.
  Fetch http://groups.csail.mit.edu/mac/ftpdir/scm/sharpbang.zip or http://groups.csail.mit.edu/mac/ftpdir/scm/#!.zip and unzip into a %PATH% directory.

x86 GNU/Linux with RPM

Obtain slib-3b1-1.noarch.rpm (590.kB) and scm-5e5-1.i386.rpm (960.kB) and install.
Release Note:

• The RPMs were created on Fedora Core 5 GNU/Linux.

Any

Obtain slib-3b1.zip (860.kB), and install.
Obtain scm-5e5.zip (840.kB) and build.
Alternatively, the build page will create custom batch scripts for compiling SCM.

Documentation

• Online SCM Manual; or scm.pdf
• Online Xlibscm Manual; or Xlibscm.pdf
• Online Hobbit Compiler Manual; or hobbit.pdf
• Online SLIB Manual; or slib.pdf
• Online Revised⁵ Report on the Algorithmic Language Scheme; or r5rs.pdf
• HTML labyrinth of the build relational database generated by the command:
  scm -r'db->html' -rbuild -e'(db->html-directory build "build")'

SCM Development

• Savannah: CVS Repository scm/scm
• Development Snapshot scm.zip (830.kB)
• SCM discussion mailing list

Related Sites and Software

• SLIB Scheme Library
• WB B-Tree Databases for SCM.
• Scheme - Dai Inukai gives excellent help and information about compiling, installing, and using SCM and other implementations on a variety of platforms.
• SCM for Macintosh (original site)
• Galapagos interactive multithreaded Scheme interpreter with turtle graphics for Windows 95.
• SCM for PocketPC running PocketConsole
• Guile Universal Scripting Language
• SCM interface to MYSQL

Miscellany

• About SCM Interpreter Speed
• SCM Interpreter Latency
• Using SCM in Engineering
• FTP Links to SCM and related software from this site and mirrors.
• htmls.zip, a collection of these html documentation files (600.kB)