Download

Latest stable version: 3.50.0
Release date: August 31, 2021

Sponsor Star

Requirements

Logtalk runs on any operating-system with a standards compliant modern Prolog compiler. The interface between Logtalk and a specific backend Prolog compiler is accomplished using a small adapter file. The Logtalk distribution includes adapter files for all supported Prolog compilers:

Be sure to install the Prolog systems that you want to use as backend compilers before installing Logtalk. In general, it is recommended that you install the most recent versions of the Prolog systems.

The experimental label means that some Logtalk features may not work as expected due to the backend Prolog compilers being under development and thus not stable and/or not (yet) providing required standard features. It may also apply to legacy Prolog compilers.

Previous Logtalk 3.x versions and legacy 2.x versions provide support for some other Prolog compilers, which are no longer supported due to lack of compliance with official and de facto standards.

License

Logtalk is an open source programming language, distributed under the Apache License 2.0. The copyright notice and license applies to all files in this release (including sources, documentation, and examples) unless otherwise explicitly stated (see the NOTICE.txt file for details on bundled third-party resources).

Git repo

The Logtalk git repo is currently hosted at GitHub. Follow these steps for running Logtalk development versions. See the release notes for the latest changes.

You may keep up to date on development changes by subscribing to the Logtalk commits RSS feed.

Sources

logtalk-3.50.0.tar.bz2
b87620ca75be4c9a4bb6c5b11080e1d5dd57783b153344716b3ec8fd63f18bb6 (SHA-256)

Includes the HTML versions of the Handbook and the APIs documentation. The bundled INSTALL.md file contains manual installation instructions.

Installers

Be sure to read the README.md, CUSTOMIZE.md, and QUICK_START.md files on the Logtalk user directory for important information, including instructions on how to customize and run Logtalk. For Windows users, this information is also available from the Logtalk program group in the Start Menu.

The following installers are available for the latest stable version:

macOS

Installs Logtalk on /opt/local/share/ with integration scripts for supported Prolog compilers on /opt/local/bin. Creates an /Applications/Logtalk folder with links to the installed files.

logtalk-3.50.0.pkg.zip
b427fb299d4cb7babe3aabefee74dca118e08cac6fd09958f558457f3f78d3f9 (SHA-256)

MacPorts

MacPorts users may use the command sudo port install logtalk (or sudo port upgrade logtalk) in order to install (or upgrade) Logtalk. Check first that the port is up-to-date.

Homebrew

Homebrew users may use the command brew install logtalk (or brew upgrade logtalk) in order to install (or upgrade) Logtalk. Check first that the formula is up-to-date.

Linux

Installs Logtalk on /usr/local/share with integration scripts for supported Prolog compilers on /usr/local/bin.

logtalk-3.50.0-1.noarch.rpm
570b28ff6b55c05de037d57af79cf4761be7e9a4412adacbd33530dceec48651 (SHA-256)

Package installation from the command-line is highly recommended:

$ sudo rpm -i logtalk-3.50.0-1.noarch.rpm

Logout and login after running the installer to activate the default values for the Logtalk environment variables.

Debian (e.g. Ubuntu)

Requires dpkg 1.15.0 or a later version. Installs Logtalk on /usr/share with integration scripts for supported Prolog compilers on /usr/bin.

logtalk_3.50.0-1_all.deb
5e32365b02e7d0d175fd560da171ac60d9edc99d984519402768a191fc316454 (SHA-256)

Package installation from the command-line is highly recommended:

$ sudo dpkg -i logtalk_3.50.0-1_all.deb

Logout and login after running the installer to activate the default values for the Logtalk environment variables.

Windows

Be sure to install a compatible Prolog compiler before running the Logtalk installer. Creates a Logtalk program group in the Start Menu with integration shortcuts for supported Prolog compilers and shortcuts for the accessing the Logtalk documentation. Can be used by both admin and non-admin users.

Installation video, courtesy of Paul Brown.

logtalk-3.50.0.exe
0a22a50f5f8193284617e2892a29ea84f5fd96dd12fd748975f4a50823db28e0 (SHA-256)
VirusTotal scan results

Logtalk is also available as a Chocolatey package and can be installed or updated using the choco install logtalk and choco upgrade logtalk commands. Alternatively, on Windows 10 or Windows Server 2019, you can use the Windows Subsystem for Linux (WSL) and install Logtalk using one of the Linux installers listed in this page.

Installing on Windows 10 requires temporarily turning off Ransomware protection (in the Windows Defender Security Center preferences) if enabled as the Logtalk installer creates the the Logtalk user directory inside the Documents directory by default.

Automatically generated installers for the latest git versions can be download from AppVeyor.

SWI-Prolog packs

Logtalk is also available as a SWI-Prolog pack. The pack is handy for deployment but not ideal for development, however, as all the files in the distribution (manuals, examples, …) are buried in a relatively deep sub-directory. The pack can be easily installed typing the query pack_install(logtalk) at the top-level (use the pack_info(logtalk) query after installation to find the installation directory). When upgrading an older pack, use pack_install(logtalk, [update(true)]) or simply pack_remove(logtalk) followed by pack_install(logtalk). See the pack specific README.md file for details. Also available as a manual download:

logtalk-3.50.0.tgz
e0d7e04c39c31e73549e119f5c3c5c74c514eba53d91359b1b0b775b575c7f97 (SHA-256)

In this case, change directory to the download directory, start SWI-Prolog, and run the query pack_install('logtalk-3.50.0.tgz').

There’s also an experimental pack that encapsulates de Logtalk compiler and runtime in a logtalk module. See the pack specific README.md file for details. This pack is only available as a manual download:

logtalk-experimental-3.50.0.tgz
4fd3e86a3ea5cc8d2a98fed37b81fa8d5a33fd5347b0c12049ea3271c97115d7 (SHA-256)

In this case, change directory to the download directory, start SWI-Prolog, and run the query pack_install('logtalk-experimental-3.50.0.tgz').

Arch Linux package

Logtalk is also available as an Arch Linux package contributed by Ebrahim Azarisooreh.

Documentation

HTML, ePub, PDF, and Texinfo versions of the Handbook (includes a tutorial, the User Manual, the Reference Manual, and the FAQ). Note that the HTML version is included in the source and binary packages.

logtalk-manuals-3.50.0.tgz
95d3207a438caa839a4555c0b97f2d94f6834b46c0022b718794e306c99e5062 (SHA-256)

Docker images

Nightly and stable Docker images are available using selected backend Prolog compilers.

Older versions

Older releases are available here (but note that time stamps do not match the release dates due to all the moving of these files between servers along the years).

Sponsorship

If you want to express you appreciation for Logtalk and help keep it a sustainable project, your sponsorship is much appreciated. Both one time sponsorships and recurring sponsorships are available, hopefully allow everyone to show their love and support for Logtalk.

Registration

Consider registering if you become a Logtalk user.