________________________________________________________________________

This file is part of Logtalk <https://logtalk.org/>  
SPDX-FileCopyrightText: 1998-2026 Paulo Moura <pmoura@logtalk.org>  
SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
________________________________________________________________________


This directory contains Prolog integration shell scripts and supporting
Prolog files. The POSIX scripts assume that Bash is installed and that
the Prolog compilers are available in the system path. The PowerShell
scripts requires PowerShell 7.x or a later version.

On POSIX and Windows systems, the Logtalk installers make the following
integration scripts available from the command-line (you may need to adjust
your system path):

* B-Prolog (8.1 or later):           `bplgt`
* Ciao Prolog (1.22.0 or later):     `ciaolgt`    (experimental; first run may require `sudo`)
* CxProlog (0.98.1 or later):        `cxlgt`
* ECLiPSe (6.1#143 or later):        `eclipselgt`
* GNU Prolog (1.4.5 or later):       `gplgt`
* JIProlog (4.1.7.1 or later):       `jiplgt`     (first run may require `sudo`)
* Quintus Prolog (3.3 or later):     `quintuslgt`
* SICStus Prolog (4.1.0 or later):   `sicstuslgt`
* SWI-Prolog (6.6.0 or later):       `swilgt`
* Tau Prolog (0.3.2 or later):       `taulgt`
* Trealla Prolog (2.84.29 or later): `tplgt`
* XSB (3.8.0 or later):              `xsblgt`     (first run may require `sudo`)
* XVM (10.0.0 or later):             `xvmlgt`
* YAP (6.3.4 or later):              `yaplgt`

Om Windows, you may need to type the `.ps1` extension (e.g. `swilgt.ps1`).

For more information about these scripts and their dependencies, consult
the corresponding `man` page (e.g., `man yaplgt`). HTML versions of the
`man` pages are also available at:

https://logtalk.org/documentation.html#man-pages

On Windows systems, the Logtalk installer also makes Prolog integration
shortcuts available from the `Start Menu/Programs/Logtalk` menu.

The first run of the Ciao Prolog, XSB, or JIProlog integration scripts may
require a user with administrative rights. On POSIX systems, run them **once**
as root or using `sudo`. In Windows systems, the first run of the integration
shortcuts must be made from an administrative account (right-click on the
shortcut and select the "Run as administrator" option).

The GNU Prolog integration script provides adequate performance for
development. But for production environments, improved performance can be
achieved by generating a new GNU-Prolog top-level that includes Logtalk.
See the `adapters/NOTES.md` file for details.

The Tau Prolog integration scripts require that the `NODE_PATH` environment
variable be set to the `node_modules` directory path where you installed
Tau Prolog and its dependencies.

The environment variables `LOGTALKHOME` and `LOGTALKUSER` should be defined
in order to run the integration scripts (see the `INSTALL.md` file for details
on setting these variables). When the scripts detect an outdated Logtalk user
directory, they create a new one by running the `logtalk_user_setup.sh` or
`logtalk_user_setup.ps1` script (a backup is automatically created of the old
directory).

Note that the integration scripts and shortcuts may fail if you use non-
standard locations for your Prolog compilers. Edit the scripts and the
shortcuts if necessary.

Depending on the size and complexity of your Logtalk applications and the
used Prolog backend compiler, you may need to change the integration scripts
in order to allocate more memory to the backend Prolog compilers. Please
consult the documentation on the backend Prolog compilers you intend to use
for details.

All the scripts accept command-line options, which are passed straight to
the backend Prolog compiler. For example (on a POSIX operating-system and
using SWI-Prolog as the backend compiler):

	% swilgt -g "write('Hello world'), nl"

Keep in mind, however, that the integration scripts already use the backend
Prolog command-line option that allows an initialization file to be loaded in
order to bootstrap Logtalk. See the script files for details.
