Logtalk 2.28.2 files.

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1711 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2006-11-07 17:11:47 +00:00
parent 297d94b096
commit 36a326908c
196 changed files with 4726 additions and 2865 deletions
--- a/Logtalk/scripts/cleandist.sh
+++ b/Logtalk/scripts/cleandist.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
--- a/Logtalk/scripts/cplgtdirs.js
+++ b/Logtalk/scripts/cplgtdirs.js
@@ -1,17 +1,22 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================

+if (ScriptEngineMajorVersion() < 5 || ScriptEngineMajorVersion() == 5 && ScriptEngineMinorVersion() < 6) {
+	WScript.Echo('Error! WSH 5.6 or later version needed for running this script.');
+	WScript.Quit(1);
+}
+
 var WshShell = new ActiveXObject("WScript.Shell");

 var WshSystemEnv = WshShell.Environment("SYSTEM");
 var WshUserEnv = WshShell.Environment("USER");
 var logtalk_home;
 var logtalk_user;
-	
+
 if (WshSystemEnv.Item("LOGTALKHOME"))
 	logtalk_home = WshSystemEnv.Item("LOGTALKHOME");
 else if (WshUserEnv.Item("LOGTALKHOME"))
@@ -46,10 +51,23 @@ else {
 }

 if (FSObject.FolderExists(logtalk_user)) {
-	WScript.Echo("Error! Logtalk user directory already exists!");
-	WScript.Echo("Please rename it or delete it and run this script again.");
+	var today = new Date();
+	var year  = today.getFullYear();
+	var month = today.getMonth() + 1;
+	var day = today.getDate();
+	if (day < 10)
+        day = "0" + day;
+	var hours = today.getHours();
+	if (hours < 10)
+        hours = "0" + hours;
+	var mins = today.getMinutes();
+	if (mins < 10)
+        mins = "0" + mins;
+	var secs = today.getSeconds();
+	date = year + "-" + month + "-" + day + " " + hours + "-" + mins + "-" + secs;
+	FSObject.MoveFolder(logtalk_user, logtalk_user + " backup " + date);
+	WScript.Echo("Created a backup of the existing " + logtalk_user + " directory.");
 	WScript.Echo("");
-	usage_help();
 }

 WScript.Echo("Creating LOGTALKUSER directory:");
@@ -61,12 +79,11 @@ FSObject.CreateFolder(logtalk_user);

 WScript.Echo("Copying Logtalk files and directories...");
 FSObject.CopyFolder(logtalk_home + "\\configs", logtalk_user + "\\configs");
-FSObject.CopyFile(logtalk_user + "\\configs\\xsb.config", logtalk_user + "\\configs\\xsb.P");
-FSObject.CopyFile(logtalk_user + "\\configs\\xsbcvs.config", logtalk_user + "\\configs\\xsbcvs.P");
+FSObject.CopyFile(logtalk_user + "\\configs\\xsb.config", logtalk_user + "\\configs\\xsb.pl");
 FSObject.CopyFolder(logtalk_home + "\\contributions", logtalk_user + "\\contributions");
 FSObject.CopyFolder(logtalk_home + "\\examples", logtalk_user + "\\examples");
 FSObject.CopyFolder(logtalk_home + "\\libpaths", logtalk_user + "\\libpaths");
-FSObject.CopyFile(logtalk_user + "\\libpaths\\libpaths.pl", logtalk_user + "\\libpaths\\libpaths.P");
+FSObject.CopyFile(logtalk_user + "\\libpaths\\libpaths.pl", logtalk_user + "\\libpaths\\libpaths_no_env_var.pl");
 FSObject.CopyFolder(logtalk_home + "\\library", logtalk_user + "\\library");
 FSObject.CopyFolder(logtalk_home + "\\xml", logtalk_user + "\\xml");

--- a/Logtalk/scripts/cplgtdirs.sh
+++ b/Logtalk/scripts/cplgtdirs.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -39,10 +39,10 @@ fi

 if [ -d "$LOGTALKUSER" ]
 then
-	echo "Error! Logtalk user directory already exists!"
-	echo "Please rename it or delete it and run this script again."
+	date=`eval date \"+%Y-%m-%d %H-%M-%S\"`
+	mv $LOGTALKUSER "$LOGTALKUSER backup $date"
+	echo "Created a backup of the existing $LOGTALKUSER directory."
 	echo
-	exit 1
 fi

 echo "Copying Logtalk files and directories..."
@@ -53,25 +53,25 @@ mkdir -p "$LOGTALKUSER"/libpaths
 mkdir -p "$LOGTALKUSER"/library
 mkdir -p "$LOGTALKUSER"/xml
 cp -RL "$LOGTALKHOME"/configs "$LOGTALKUSER"/
-ln -sf xsb.config "$LOGTALKUSER"/configs/xsb.P 
-ln -sf xsbcvs.config "$LOGTALKUSER"/configs/xsbcvs.P 
+ln -sf xsb.config "$LOGTALKUSER"/configs/xsb.pl
 cp -RL "$LOGTALKHOME"/contributions "$LOGTALKUSER"/
 cp -RL "$LOGTALKHOME"/examples "$LOGTALKUSER"/
 cp -RL "$LOGTALKHOME"/libpaths "$LOGTALKUSER"/
-sed 's_\$LOGTALKUSER_'$LOGTALKUSER'_' "$LOGTALKUSER"/libpaths/libpaths.pl > "$LOGTALKUSER"/libpaths/libpaths.P
+sed 's_\$LOGTALKUSER_'$LOGTALKUSER'_' "$LOGTALKUSER"/libpaths/libpaths.pl > "$LOGTALKUSER"/libpaths/libpaths_no_env_var.pl
 cp -RL "$LOGTALKHOME"/library "$LOGTALKUSER"/
 cp -RL "$LOGTALKHOME"/xml "$LOGTALKUSER"/
 chmod -R u+w "$LOGTALKUSER"
 rm -f "$LOGTALKUSER"/xml/lgt2*
 rm -f "$LOGTALKUSER"/xml/logtalk.dtd
 rm -f "$LOGTALKUSER"/xml/logtalk.xsd
-ln -sf "$LOGTALKHOME"/BIBLIOGRAPHY "$LOGTALKUSER"/BIBLIOGRAPHY
-ln -sf "$LOGTALKHOME"/INSTALL "$LOGTALKUSER"/INSTALL
-ln -sf "$LOGTALKHOME"/LICENSE "$LOGTALKUSER"/LICENSE
-ln -sf "$LOGTALKHOME"/QUICK_START "$LOGTALKUSER"/QUICK_START
-ln -sf "$LOGTALKHOME"/README "$LOGTALKUSER"/README
-ln -sf "$LOGTALKHOME"/RELEASE_NOTES "$LOGTALKUSER"/RELEASE_NOTES
-ln -sf "$LOGTALKHOME"/UPGRADING "$LOGTALKUSER"/UPGRADING
+ln -sf "$LOGTALKHOME"/BIBLIOGRAPHY.bib "$LOGTALKUSER"/BIBLIOGRAPHY.bib
+ln -sf "$LOGTALKHOME"/CUSTOMIZE.txt "$LOGTALKUSER"/CUSTOMIZE.txt
+ln -sf "$LOGTALKHOME"/INSTALL.txt "$LOGTALKUSER"/INSTALL.txt
+ln -sf "$LOGTALKHOME"/LICENSE.txt "$LOGTALKUSER"/LICENSE.txt
+ln -sf "$LOGTALKHOME"/QUICK_START.txt "$LOGTALKUSER"/QUICK_START.txt
+ln -sf "$LOGTALKHOME"/README.txt "$LOGTALKUSER"/README.txt
+ln -sf "$LOGTALKHOME"/RELEASE_NOTES.txt "$LOGTALKUSER"/RELEASE_NOTES.txt
+ln -sf "$LOGTALKHOME"/UPGRADING.txt "$LOGTALKUSER"/UPGRADING.txt
 ln -sf "$LOGTALKHOME"/manuals "$LOGTALKUSER"/manuals
 ln -sf "$LOGTALKHOME"/wenv "$LOGTALKUSER"/wenv
 ln -sf "$LOGTALKHOME"/xml/lgt2html.sh "$LOGTALKUSER"/xml/lgt2html
--- a/Logtalk/scripts/debian/control
+++ b/Logtalk/scripts/debian/control
@@ -1,5 +1,5 @@
 Package: logtalk
-Version: 2.27.1
+Version: 2.28.2
 Section: languages
 Priority: optional
 Architecture: all
--- a/Logtalk/scripts/lgt_install.js
+++ b/Logtalk/scripts/lgt_install.js
@@ -1,10 +1,15 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================

+if (ScriptEngineMajorVersion() < 5 || ScriptEngineMajorVersion() == 5 && ScriptEngineMinorVersion() < 6) {
+	WScript.Echo('Error! WSH 5.6 or later version needed for running this script.');
+	WScript.Quit(1);
+}
+
 if (WScript.Arguments.Unnamed.Length > 0) {
 	usage_help();
 	WScript.Quit(0);
@@ -40,90 +45,78 @@ else {
 }
 WScript.Echo("");

-WshSystemEnv.Item("PATH") = WshSystemEnv.Item("PATH") + ";%LOGTALKHOME%\\scripts;%LOGTALKHOME%\\xml";
-WScript.Echo("Added Logtalk scripts and xml directories to the system PATH environment");
-WScript.Echo("variable.");
+FSObject.CopyFile(WshShell.CurrentDirectory + "\\scripts\\*.bat", FSObject.GetSpecialFolder(0));
+FSObject.CopyFile(WshShell.CurrentDirectory + "\\xml\\*.bat", FSObject.GetSpecialFolder(0));
+WScript.Echo("Copied Logtalk documenting batch scripts to the system's Windows folder");
 WScript.Echo("");

-FSObject.CopyFile(WshShell.CurrentDirectory + "\\BIBLIOGRAPHY", WshShell.CurrentDirectory + "\\BIBLIOGRAPHY.txt");
-FSObject.CopyFile(WshShell.CurrentDirectory + "\\INSTALL", WshShell.CurrentDirectory + "\\INSTALL.txt");
-FSObject.CopyFile(WshShell.CurrentDirectory + "\\LICENSE", WshShell.CurrentDirectory + "\\LICENSE.txt");
-FSObject.CopyFile(WshShell.CurrentDirectory + "\\QUICK_START", WshShell.CurrentDirectory + "\\QUICK_START.txt");
-FSObject.CopyFile(WshShell.CurrentDirectory + "\\README", WshShell.CurrentDirectory + "\\README.txt");
-FSObject.CopyFile(WshShell.CurrentDirectory + "\\RELEASE_NOTES", WshShell.CurrentDirectory + "\\RELEASE_NOTES.txt");
-FSObject.CopyFile(WshShell.CurrentDirectory + "\\UPGRADING", WshShell.CurrentDirectory + "\\UPGRADING.txt");
-
 var ProgramsPath = WshShell.SpecialFolders("AllUsersPrograms");

 if (!FSObject.FolderExists(ProgramsPath + "\\Logtalk")) 
 	FSObject.CreateFolder(ProgramsPath + "\\Logtalk");

 var link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk Web Site.url");
-
 link.TargetPath = "http://www.logtalk.org/";
 link.Save();

 link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk HTML Documentation.lnk");
-
 link.Description = "Browse Logtalk Documentation";
 link.TargetPath = WshShell.CurrentDirectory + "\\manuals\\index.html";
 link.Save();

 link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk ReadMe.lnk");
-
 link.Description = "Open Logtalk ReadMe";
 link.TargetPath = WshShell.CurrentDirectory + "\\README.txt";
 link.Save();

-link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk Install and configuration.lnk");
-
-link.Description = "Open Logtalk Install and configuration";
+link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk Installation and Configuration.lnk");
+link.Description = "Open Logtalk Install and configuration instructions";
 link.TargetPath = WshShell.CurrentDirectory + "\\INSTALL.txt";
 link.Save();

-link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk Quick Start.lnk");
+link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk Customization.lnk");
+link.Description = "Open Logtalk customization instructions";
+link.TargetPath = WshShell.CurrentDirectory + "\\CUSTOMIZE.txt";
+link.Save();

+link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk Quick Start.lnk");
 link.Description = "Open Logtalk Quick Start";
 link.TargetPath = WshShell.CurrentDirectory + "\\QUICK_START.txt";
 link.Save();

 link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk Bibliography.lnk");
-
 link.Description = "Open Logtalk Bibliography";
-link.TargetPath = WshShell.CurrentDirectory + "\\BIBLIOGRAPHY.txt";
+link.TargetPath = WshShell.CurrentDirectory + "\\BIBLIOGRAPHY.bib";
 link.Save();

 link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk License.lnk");
-
 link.Description = "Open Logtalk License";
 link.TargetPath = WshShell.CurrentDirectory + "\\LICENSE.txt";
 link.Save();

 link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk Release Notes.lnk");
-
 link.Description = "Open Logtalk Release Notes";
 link.TargetPath = WshShell.CurrentDirectory + "\\RELEASE_NOTES.txt";
 link.Save();

 link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk Upgrading.lnk");
-
 link.Description = "Open Logtalk Upgrading instructions";
 link.TargetPath = WshShell.CurrentDirectory + "\\UPGRADING.txt";
 link.Save();

 WScript.Echo('Logtalk basic installation completed. You will need to RESTART in order');
 WScript.Echo('to activate the new system environment variables and use the items in');
-WScript.Echo('the new Logtalk program group. See the Install and configuration file');
+WScript.Echo('the new Logtalk program group. See the INSTALL and CUSTOMIZATION files');
 WScript.Echo('for details on customizing your working environment.');
 WScript.Echo('');
 WScript.Echo('After restarting your computer, you may want to run some of the Prolog');
 WScript.Echo('integration scripts, which you will find on the same directory as this');
 WScript.Echo('installer script.');
 WScript.Echo('');
-WScript.Echo('Users must run the batch script cplgtdirs in order to copy the');
-WScript.Echo('Logtalk user-modifiable files to their home directories. The path');
-WScript.Echo('to the cplgtdirs, lgt2pdf, lgt2html, and lgt2xml batch scripts has');
-WScript.Echo('been added to the system path environment variable.');
+WScript.Echo('Users must run the batch script "cplgtdirs" once in order to copy the');
+WScript.Echo('Logtalk user-modifiable files to their home directories. The path to');
+WScript.Echo('the "cplgtdirs", "lgt2pdf", "lgt2html", and "lgt2xml" batch scripts');
+WScript.Echo('has been added to the system path environment variable.');
 WScript.Echo('');

 WScript.Quit(0);
--- a/Logtalk/scripts/lgt_install.sh
+++ b/Logtalk/scripts/lgt_install.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -23,20 +23,20 @@ echo
 echo "Installing Logtalk on $prefix ..."
 echo

-rm -rf $prefix/lgt2271
+rm -rf $prefix/lgt2282
 rm -f $prefix/logtalk

-mkdir $prefix/lgt2271
+mkdir $prefix/lgt2282

 cd ..
-cp -R * $prefix/lgt2271
+cp -R * $prefix/lgt2282

 cd $prefix
-chmod -R go-w,a+r lgt2271
-chmod a+x lgt2271
-chmod a+x lgt2271/scripts/*.sh
-chmod a+x lgt2271/xml/*.sh
-ln -sf lgt2271 logtalk
+chmod -R go-w,a+r lgt2282
+chmod a+x lgt2282
+chmod a+x lgt2282/scripts/*.sh
+chmod a+x lgt2282/xml/*.sh
+ln -sf lgt2282 logtalk

 mkdir -p bin
 cd bin
@@ -45,14 +45,14 @@ ln -sf ../logtalk/xml/lgt2pdf.sh lgt2pdf
 ln -sf ../logtalk/xml/lgt2html.sh lgt2html
 ln -sf ../logtalk/xml/lgt2xml.sh lgt2xml

-echo "Logtalk basic installation completed. See the INSTALL file for details"
-echo "on customizing your working environment."
+echo "Logtalk basic installation completed. See the INSTALL and CUSTOMIZATION"
+echo "files for details on customizing your working environment."
 echo
 echo "You may want to run some of the Prolog integration scripts, which you"
 echo "will find on the same directory as this installer script."
 echo
-echo "Users must define the environment variable LOGTALKHOME pointing"
-echo "to $prefix/logtalk and then run the shell script cplgtdirs"
+echo "Users must define the environment variable LOGTALKHOME pointing to"
+echo "$prefix/logtalk and then run the shell script cplgtdirs"
 echo "in order to copy the Logtalk user-modifiable files to their home"
 echo "directories."
 echo
--- a/Logtalk/scripts/logtalk.spec
+++ b/Logtalk/scripts/logtalk.spec
@@ -1,31 +1,31 @@
 Name: logtalk
 Summary: Logtalk - Open source object-oriented extension to Prolog
-Version: 2.27.1
+Version: 2.28.2
 Release: 1
 License: Artistic License 2.0
 Group: Development/Languages
 Packager: Paulo Moura <pmoura@logtalk.org>
-Source: http://www.logtalk.org/files/lgt2271.tgz
+Source: http://logtalk.org/files/lgt2282.tgz
 BuildArchitectures: noarch
-URL: http://www.logtalk.org/
+URL: http://logtalk.org/
 Prefix: /usr/local
 AutoReqProv: no
 %description
 Logtalk is an open source object-oriented extension to the Prolog programming language. Integrating logic programming with object-oriented and event-driven programming, it is compatible with most Prolog compilers. It supports both prototypes and classes. In addition, it supports component-based programming through category-based composition.
 %prep
-%setup -n lgt2271
+%setup -n lgt2282
 %build
 %install
-rm -rf /usr/local/lgt2271
+rm -rf /usr/local/lgt2282
 rm -f /usr/local/logtalk
-mkdir /usr/local/lgt2271
-cp -R * /usr/local/lgt2271
+mkdir /usr/local/lgt2282
+cp -R * /usr/local/lgt2282
 cd /usr/local
-chmod -R go-w,a+r lgt2271
-chmod a+x lgt2271
-chmod a+x lgt2271/scripts/*.sh
-chmod a+x lgt2271/xml/*.sh
-ln -sf lgt2271 logtalk
+chmod -R go-w,a+r lgt2282
+chmod a+x lgt2282
+chmod a+x lgt2282/scripts/*.sh
+chmod a+x lgt2282/xml/*.sh
+ln -sf lgt2282 logtalk
 cd bin
 ln -sf ../logtalk/scripts/cplgtdirs.sh cplgtdirs
 ln -sf ../logtalk/xml/lgt2pdf.sh lgt2pdf
@@ -34,26 +34,62 @@ ln -sf ../logtalk/xml/lgt2xml.sh lgt2xml
 %clean
 %files
 %defattr(-,root,users)
-%doc /usr/local/lgt2271/BIBLIOGRAPHY
-%doc /usr/local/lgt2271/INSTALL
-%doc /usr/local/lgt2271/LICENSE
-%doc /usr/local/lgt2271/QUICK_START
-%doc /usr/local/lgt2271/README
-%doc /usr/local/lgt2271/RELEASE_NOTES
-%doc /usr/local/lgt2271/UPGRADING
-/usr/local/lgt2271/compiler
-/usr/local/lgt2271/configs
-/usr/local/lgt2271/contributions
-/usr/local/lgt2271/examples
-/usr/local/lgt2271/libpaths
-/usr/local/lgt2271/library
-%docdir /usr/local/lgt2271/manuals
-/usr/local/lgt2271/manuals
-/usr/local/lgt2271/scripts
-/usr/local/lgt2271/wenv
-/usr/local/lgt2271/xml
+%doc /usr/local/lgt2282/BIBLIOGRAPHY.bib
+%doc /usr/local/lgt2282/CUSTOMIZE.txt
+%doc /usr/local/lgt2282/INSTALL.txt
+%doc /usr/local/lgt2282/LICENSE.txt
+%doc /usr/local/lgt2282/QUICK_START.txt
+%doc /usr/local/lgt2282/README.txt
+%doc /usr/local/lgt2282/RELEASE_NOTES.txt
+%doc /usr/local/lgt2282/UPGRADING.txt
+/usr/local/lgt2282/compiler
+/usr/local/lgt2282/configs
+/usr/local/lgt2282/contributions
+/usr/local/lgt2282/examples
+/usr/local/lgt2282/libpaths
+/usr/local/lgt2282/library
+%docdir /usr/local/lgt2282/manuals
+/usr/local/lgt2282/manuals
+/usr/local/lgt2282/scripts
+/usr/local/lgt2282/wenv
+/usr/local/lgt2282/xml
 /usr/local/logtalk
 /usr/local/bin/cplgtdirs
 /usr/local/bin/lgt2pdf
 /usr/local/bin/lgt2html
 /usr/local/bin/lgt2xml
+%post
+mkdir -p /etc/profile.d
+echo "# Logtalk environment setup" > /etc/profile.d/logtalk.sh
+echo "" >> /etc/profile.d/logtalk.sh
+echo "# Logtalk installation directory:" >> /etc/profile.d/logtalk.sh
+echo "export LOGTALKHOME=$RPM_INSTALL_PREFIX/logtalk" >> /etc/profile.d/logtalk.sh
+echo "" >> /etc/profile.d/logtalk.sh
+echo "# Default location for Logtalk end-user files:" >> /etc/profile.d/logtalk.sh
+echo "export LOGTALKUSER=$HOME/logtalk" >> /etc/profile.d/logtalk.sh
+chmod a+x /etc/profile.d/logtalk.sh
+echo "# Logtalk environment setup" > /etc/profile.d/logtalk.csh
+echo "" >> /etc/profile.d/logtalk.csh
+echo "# Logtalk installation directory:" >> /etc/profile.d/logtalk.csh
+echo "setenv LOGTALKHOME $RPM_INSTALL_PREFIX/logtalk" >> /etc/profile.d/logtalk.csh
+echo "" >> /etc/profile.d/logtalk.csh
+echo "# Default location for Logtalk end-user files:" >> /etc/profile.d/logtalk.csh
+echo "setenv LOGTALKUSER $HOME/logtalk" >> /etc/profile.d/logtalk.csh
+chmod a+x /etc/profile.d/logtalk.csh
+eval export LOGTALKHOME=$RPM_INSTALL_PREFIX/logtalk; cd $LOGTALKHOME/scripts; ./makeall_lgt.sh $RPM_INSTALL_PREFIX
+echo ""
+echo "Defined the following environment variables for all users:"
+echo ""
+echo "  Logtalk installation directory: LOGTALKHOME = $RPM_INSTALL_PREFIX/logtalk"
+echo "  Default Logtalk user files directory: LOGTALKUSER = $HOME/logtalk"
+echo ""
+echo "You may need to logout and login again or start a new shell in order to"
+echo "use the new environment variables."
+echo ""
+echo "You may change the default value of the LOGTALKUSER environment variable"
+echo "in your shell configuration files if you already use, or want to use, a 
+echo "different location for the Logtalk user files directory."
+echo ""
+%postun
+rm -f /etc/profile.d/logtalk.sh
+rm -f /etc/profile.d/logtalk.csh
--- a/Logtalk/scripts/make_ciaolgt.js
+++ b/Logtalk/scripts/make_ciaolgt.js
@@ -1,10 +1,15 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================

+if (ScriptEngineMajorVersion() < 5 || ScriptEngineMajorVersion() == 5 && ScriptEngineMinorVersion() < 6) {
+	WScript.Echo('Error! WSH 5.6 or later version needed for running this script.');
+	WScript.Quit(1);
+}
+
 if (WScript.Arguments.Unnamed.Length > 0) {
 	usage_help();
 	WScript.Quit(0);
@@ -57,10 +62,10 @@ if (!FSObject.FolderExists(logtalk_home + "\\bin"))

 var f = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_ciao.pl", true);

-f.WriteLine(":- ensure_loaded('\$LOGTALKUSER/configs/ciao_aux.config').");
+f.WriteLine(":- ensure_loaded('$LOGTALKUSER/configs/ciao_aux.config').");
 f.WriteLine(":- set_prolog_flag(multi_arity_warnings, off).");
-f.WriteLine(":- ensure_loaded('\$LOGTALKHOME/compiler/logtalk.pl').");
-f.WriteLine(":- ensure_loaded('\$LOGTALKUSER/libpaths/libpaths.pl').");
+f.WriteLine(":- ensure_loaded('$LOGTALKHOME/compiler/logtalk.pl').");
+f.WriteLine(":- ensure_loaded('$LOGTALKUSER/libpaths/libpaths.pl').");
 f.WriteLine(":- op(600, xfy, ::).");
 f.WriteLine(":- op(600, fy, ::).");
 f.WriteLine(":- op(600, fy, ^^).");
@@ -76,9 +81,9 @@ if (!FSObject.FolderExists(ProgramsPath + "\\Logtalk"))
 	FSObject.CreateFolder(ProgramsPath + "\\Logtalk");

 var link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk - CIAO.lnk");
-link.Arguments = "-l %LOGTALKHOME%\\bin\\logtalk_ciao.pl";
-link.Description = "Runs Logtalk with CIAO";
-link.IconLocation = "app.exe,1";
+link.Arguments = '-l "$LOGTALKHOME/bin/logtalk_ciao.pl"';
+link.Description = 'Runs Logtalk with CIAO';
+link.IconLocation = 'app.exe,1';
 link.TargetPath = prolog_path;
 link.WindowStyle = 1;
 link.WorkingDirectory = logtalk_home;
--- a/Logtalk/scripts/make_ciaolgt.sh
+++ b/Logtalk/scripts/make_ciaolgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -41,25 +41,26 @@ fi
 cd "$LOGTALKHOME"
 mkdir -p bin
 cd bin
-echo ":- ensure_loaded('\$LOGTALKUSER/configs/ciao_aux.config')." > logtalk_ciao.rc
-echo ":- set_prolog_flag(multi_arity_warnings, off)." >> logtalk_ciao.rc
-echo ":- ensure_loaded('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_ciao.rc
-echo ":- ensure_loaded('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_ciao.rc
-echo ":- op(600, xfy, ::)." >> logtalk_ciao.rc
-echo ":- op(600, fy, ::)." >> logtalk_ciao.rc
-echo ":- op(600, fy, ^^)." >> logtalk_ciao.rc
-echo ":- op(200, fy, +)." >> logtalk_ciao.rc
-echo ":- op(200, fy, ?)." >> logtalk_ciao.rc
-echo ":- op(200, fy, @)." >> logtalk_ciao.rc
-echo ":- op(200, fy, -)." >> logtalk_ciao.rc
+echo ":- ensure_loaded('\$LOGTALKUSER/configs/ciao_aux.config')." > logtalk_ciao.pl
+echo ":- set_prolog_flag(multi_arity_warnings, off)." >> logtalk_ciao.pl
+echo ":- ensure_loaded('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_ciao.pl
+echo ":- ensure_loaded('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_ciao.pl
+echo ":- op(600, xfy, ::)." >> logtalk_ciao.pl
+echo ":- op(600, fy, ::)." >> logtalk_ciao.pl
+echo ":- op(600, fy, ^^)." >> logtalk_ciao.pl
+echo ":- op(200, fy, +)." >> logtalk_ciao.pl
+echo ":- op(200, fy, ?)." >> logtalk_ciao.pl
+echo ":- op(200, fy, @)." >> logtalk_ciao.pl
+echo ":- op(200, fy, -)." >> logtalk_ciao.pl
 echo "#/bin/sh" > ciaolgt
-echo "ciaosh -l \$LOGTALKHOME/bin/logtalk_ciao.rc" >> ciaolgt
+echo "ciaosh -l \$LOGTALKHOME/bin/logtalk_ciao.pl" >> ciaolgt
 chmod a+x ciaolgt
 ln -sf $LOGTALKHOME/bin/ciaolgt $prefix/bin/ciaolgt
 echo "Done. A link to the script was been created in $prefix/bin."
-echo "Users must define the environment variables LOGTALKHOME and"
-echo "LOGTALKUSER in order to use the script. Users must run the"
-echo "the cplgtdirs script before using the ciaolgt script."
+echo "The first call to the script the must be made as root or using"
+echo "sudo."
 echo
-echo "The first call to script the must be made as root or using sudo."
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "once prior to using the ciaolgt script."
 echo
--- a/Logtalk/scripts/make_eclipselgt.js
+++ b/Logtalk/scripts/make_eclipselgt.js
@@ -1,10 +1,15 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================

+if (ScriptEngineMajorVersion() < 5 || ScriptEngineMajorVersion() == 5 && ScriptEngineMinorVersion() < 6) {
+	WScript.Echo('Error! WSH 5.6 or later version needed for running this script.');
+	WScript.Quit(1);
+}
+
 if (WScript.Arguments.Unnamed.Length > 0) {
 	usage_help();
 	WScript.Quit(0);
@@ -12,12 +17,12 @@ if (WScript.Arguments.Unnamed.Length > 0) {

 WScript.Echo('');
 WScript.Echo('Creating a shortcut named "Logtalk - ECLiPSe" for running Logtalk with');
-WScript.Echo('ECLiPSe 5.8 (edit this script if you are using a different version)...');
+WScript.Echo('ECLiPSe 5.10 (edit this script if you are using a different version)...');
 WScript.Echo('');

 var WshShell = new ActiveXObject("WScript.Shell");

-var prolog_path = WshShell.RegRead("HKLM\\Software\\IC-Parc\\Eclipse\\5.8\\ECLIPSEDIR") + "\\lib\\i386_nt\\eclipse.exe";
+var prolog_path = WshShell.RegRead("HKLM\\Software\\IC-Parc\\Eclipse\\5.10\\ECLIPSEDIR") + "\\lib\\i386_nt\\eclipse.exe";

 var FSObject = new ActiveXObject("Scripting.FileSystemObject");

@@ -55,13 +60,19 @@ logtalk_home = logtalk_home.replace(/\\/g, "\\\\");
 if (!FSObject.FolderExists(logtalk_home + "\\bin")) 
 	FSObject.CreateFolder(logtalk_home + "\\bin");

-var f = FSObject.CreateTextFile(logtalk_home + "\\bin\\lgtc_eclipse.pl", true);
+var f1 = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_comp_eclipse.pl", true);
+var f2 = FSObject.OpenTextFile(logtalk_home + "\\compiler\\logtalk.pl", 1);
+var line;

-f.WriteLine(":- pragma(system).");
-f.WriteLine(":- pragma(nodebug).");
-f.Close();
+f1.WriteLine(":- pragma(system).");
+f1.WriteLine(":- pragma(nodebug).");
+while (!f2.AtEndOfStream) {
+	line = f2.ReadLine();
+	f1.WriteLine(line);
+}

-WshShell.Run("cmd /c type " + logtalk_home + "\\compiler\\logtalk.pl" + " >> " + logtalk_home + "\\bin\\lgtc_eclipse.pl", true);
+f1.Close();
+f2.Close();

 f = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_eclipse.pl", true);

@@ -69,7 +80,7 @@ f.WriteLine(":- ensure_loaded(library(toplevel)).");
 f.WriteLine(":- cd('$LOGTALKUSER').");
 f.WriteLine(":- compile('configs/eclipseiso.config').");
 f.WriteLine(":- cd('$LOGTALKHOME').");
-f.WriteLine(":- compile('bin/lgtc_eclipse.pl').");
+f.WriteLine(":- compile('bin/logtalk_comp_eclipse.pl').");
 f.WriteLine(":- cd('$LOGTALKUSER').");
 f.WriteLine(":- compile('libpaths/libpaths.pl').");
 f.Close();
@@ -80,12 +91,12 @@ if (!FSObject.FolderExists(ProgramsPath + "\\Logtalk"))
 	FSObject.CreateFolder(ProgramsPath + "\\Logtalk");

 var link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk - ECLiPSe.lnk");
-link.Arguments = "-b %LOGTALKHOME%\\bin\\logtalk_eclipse.pl";
-link.Description = "Runs Logtalk with ECLiPSe";
-link.IconLocation = "app.exe,1";
+link.Arguments = '-b "%LOGTALKHOME%\\bin\\logtalk_eclipse.pl"';
+link.Description = 'Runs Logtalk with ECLiPSe';
+link.IconLocation = 'app.exe,1';
 link.TargetPath = prolog_path;
 link.WindowStyle = 1;
-link.WorkingDirectory = logtalk_home;
+link.WorkingDirectory = '%LOGTALKUSER%';
 link.Save();

 WScript.Echo('Done. The "Logtalk - ECLiPSe" shortcut was been added to the');
--- a/Logtalk/scripts/make_eclipselgt.sh
+++ b/Logtalk/scripts/make_eclipselgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -41,18 +41,24 @@ fi
 cd "$LOGTALKHOME"
 mkdir -p bin
 cd bin
-echo ":- pragma(system)." > logtalk_eclipse.pl
-echo ":- pragma(nodebug)." >> logtalk_eclipse.pl
-echo ":- ensure_loaded(library(toplevel))." >> logtalk_eclipse.pl
-echo ":- include('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_eclipse.pl
-echo ":- compile('\$LOGTALKUSER/configs/eclipseiso.config')." > logtalk_eclipse.rc
-echo ":- compile('\$LOGTALKHOME/bin/logtalk_eclipse.pl')." >> logtalk_eclipse.rc
-echo ":- compile('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_eclipse.rc
+
+echo ":- pragma(system)." > logtalk_comp_eclipse.pl
+echo ":- pragma(nodebug)." >> logtalk_comp_eclipse.pl
+echo ":- ensure_loaded(library(toplevel))." >> logtalk_comp_eclipse.pl
+echo ":- include('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_comp_eclipse.pl
+
+echo ":- compile('\$LOGTALKUSER/configs/eclipseiso.config')." > logtalk_eclipse.pl
+echo ":- compile('\$LOGTALKHOME/bin/logtalk_comp_eclipse.pl')." >> logtalk_eclipse.pl
+echo ":- compile('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_eclipse.pl
+
 echo "#/bin/sh" > eclipselgt
-echo "eclipse -b \$LOGTALKHOME/bin/logtalk_eclipse.rc" >> eclipselgt
+echo "eclipse -b \$LOGTALKHOME/bin/logtalk_eclipse.pl" >> eclipselgt
 chmod a+x eclipselgt
 ln -sf $LOGTALKHOME/bin/eclipselgt $prefix/bin/eclipselgt
+
 echo "Done. A link to the script was been created in $prefix/bin."
-echo "Users must define the environment variables LOGTALKHOME and"
-echo "LOGTALKUSER in order to use the script."
+echo
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "once prior to using the eclipselgt script."
 echo
--- a/Logtalk/scripts/make_gplgt.js
+++ b/Logtalk/scripts/make_gplgt.js
@@ -1,10 +1,15 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================

+if (ScriptEngineMajorVersion() < 5 || ScriptEngineMajorVersion() == 5 && ScriptEngineMinorVersion() < 6) {
+	WScript.Echo('Error! WSH 5.6 or later version needed for running this script.');
+	WScript.Quit(1);
+}
+
 if (WScript.Arguments.Unnamed.Length > 0) {
 	usage_help();
 	WScript.Quit(0);
@@ -57,11 +62,18 @@ if (!FSObject.FolderExists(logtalk_home + "\\bin"))

 FSObject.CopyFile(logtalk_home + "\\configs\\gnu.config", logtalk_home + "\\bin\\gnu.pl");

-var f = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_gp.pl", true);
-f.WriteLine(":- built_in.");
-f.Close();
+var f1 = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_gp.pl", true);
+var f2 = FSObject.OpenTextFile(logtalk_home + "\\compiler\\logtalk.pl", 1);
+var line;

-WshShell.Run("cmd /c type " + logtalk_home + "\\compiler\\logtalk.pl" + " >> " + logtalk_home + "\\bin\\logtalk_gp.pl", true);
+f1.WriteLine(":- built_in.");
+while (!f2.AtEndOfStream) {
+	line = f2.ReadLine();
+	f1.WriteLine(line);
+}
+
+f1.Close();
+f2.Close();

 var ProgramsPath = WshShell.SpecialFolders("AllUsersPrograms");

--- a/Logtalk/scripts/make_gplgt.sh
+++ b/Logtalk/scripts/make_gplgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -48,6 +48,8 @@ echo "gprolog --init-goal \"['\$LOGTALKUSER/configs/gnu.config', '\$LOGTALKHOME/
 chmod a+x gplgt
 ln -sf $LOGTALKHOME/bin/gplgt $prefix/bin/gplgt
 echo "Done. A link to the script was been created in $prefix/bin."
-echo "Users must define the environment variables LOGTALKHOME and"
-echo "LOGTALKUSER in order to use the script."
+echo
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "once prior to using the gplgt script."
 echo
--- a/Logtalk/scripts/make_plclgt.js
+++ b/Logtalk/scripts/make_plclgt.js
@@ -1,10 +1,15 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================

+if (ScriptEngineMajorVersion() < 5 || ScriptEngineMajorVersion() == 5 && ScriptEngineMinorVersion() < 6) {
+	WScript.Echo('Error! WSH 5.6 or later version needed for running this script.');
+	WScript.Quit(1);
+}
+
 if (WScript.Arguments.Unnamed.Length > 0) {
 	usage_help();
 	WScript.Quit(0);
@@ -64,7 +69,7 @@ logtalk_home = logtalk_home.replace(/\\/g, "\\\\");
 if (!FSObject.FolderExists(logtalk_home + "\\bin"))
 	FSObject.CreateFolder(logtalk_home + "\\bin");

-f = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_plc.rc", true);
+f = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_plc.pl", true);

 f.WriteLine(":- consult('$LOGTALKUSER/configs/k.config').");
 f.WriteLine(":- consult('$LOGTALKHOME/compiler/logtalk.pl').");
@@ -77,7 +82,7 @@ if (!FSObject.FolderExists(ProgramsPath + "\\Logtalk"))
 	FSObject.CreateFolder(ProgramsPath + "\\Logtalk");

 var link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk - K-Prolog.lnk");
-link.Arguments = "-h 2048k -l 1024k -g 2048k -e \"(consult('$LOGTALKHOME/bin/logtalk_plc.rc'), '$root').\"";
+link.Arguments = "-h 2048k -l 1024k -g 2048k -e \"(consult('$LOGTALKHOME/bin/logtalk_plc.pl'), '$root').\"";
 link.Description = "Runs Logtalk with K-Prolog";
 link.IconLocation = "app.exe,1";
 link.TargetPath = prolog_path;
--- a/Logtalk/scripts/make_plclgt.sh
+++ b/Logtalk/scripts/make_plclgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -41,14 +41,16 @@ fi
 cd "$LOGTALKHOME"
 mkdir -p bin
 cd bin
-echo ":- ensure_loaded('\$LOGTALKUSER/configs/k.config')." > logtalk_plc.rc
-echo ":- ensure_loaded('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_plc.rc
-echo ":- ensure_loaded('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_plc.rc
+echo ":- ensure_loaded('\$LOGTALKUSER/configs/k.config')." > logtalk_plc.pl
+echo ":- ensure_loaded('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_plc.pl
+echo ":- ensure_loaded('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_plc.pl
 echo "#/bin/sh" > plclgt
-echo "\$PLC/plc -h 2048k -l 1024k -g 2048k -e \"(consult('\\\$LOGTALKHOME/bin/logtalk_plc.rc'), '\\\$root').\"" >> plclgt
+echo "\$PLC/plc -h 2048k -l 1024k -g 2048k -e \"(consult('\\\$LOGTALKHOME/bin/logtalk_plc.pl'), '\\\$root').\"" >> plclgt
 chmod a+x plclgt
 ln -sf $LOGTALKHOME/bin/plclgt $prefix/bin/plclgt
 echo "Done. A link to the script was been created in $prefix/bin."
-echo "Users must define the environment variables LOGTALKHOME and"
-echo "LOGTALKUSER in order to use the script."
+echo
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "once prior to using the plclgt script."
 echo
--- a/Logtalk/scripts/make_qplgt.sh
+++ b/Logtalk/scripts/make_qplgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -56,6 +56,10 @@ rm ../configs/qu.qo
 rm ../compiler/logtalk.qo
 rm ../libpaths/libpaths.qo
 echo "Done. A link to the script was been created in $prefix/bin."
-echo "Users must define the environment variables LOGTALKHOME and"
-echo "LOGTALKUSER in order to use the script."
+echo "The script must be regenerated whenever changes are made to"
+echo "either the config file or the libpaths file."
+echo
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "once prior to using the qplgt script."
 echo
--- a/Logtalk/scripts/make_sicstuslgt.js
+++ b/Logtalk/scripts/make_sicstuslgt.js
@@ -1,10 +1,15 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================

+if (ScriptEngineMajorVersion() < 5 || ScriptEngineMajorVersion() == 5 && ScriptEngineMinorVersion() < 6) {
+	WScript.Echo('Error! WSH 5.6 or later version needed for running this script.');
+	WScript.Quit(1);
+}
+
 if (WScript.Arguments.Unnamed.Length > 0) {
 	usage_help();
 	WScript.Quit(0);
@@ -12,17 +17,41 @@ if (WScript.Arguments.Unnamed.Length > 0) {

 WScript.Echo('');
 WScript.Echo('Creating a shortcut named "Logtalk - SICStus Prolog" for running Logtalk with');
-WScript.Echo('SICStus Prolog 3.12 (edit the script if you are using other version)...');
+WScript.Echo('SICStus Prolog 4.0 or 3.12 (edit the script if you are using other version)...');
 WScript.Echo('');

 var WshShell = new ActiveXObject("WScript.Shell");

-var prolog_path = WshShell.RegRead("HKLM\\Software\\SICS\\SICStus3.12_win32\\SP_PATH") + "\\bin\\spwin.exe";
+var prolog_path;
+var prolog_path4;
+var prolog_path3;
+var config_file;
+
+try {
+	prolog_path4 = WshShell.RegRead("HKLM\\Software\\SICS\\SICStus4.0_win32\\SP_PATH") + "\\bin\\spwin.exe";
+}
+catch(e) {
+	prolog_path4 = "not_installed.lgt";
+}
+try {
+	prolog_path3 = WshShell.RegRead("HKLM\\Software\\SICS\\SICStus3.12_win32\\SP_PATH") + "\\bin\\spwin.exe";
+}
+catch(e) {
+	prolog_path3 = "not_installed.lgt";
+}

 var FSObject = new ActiveXObject("Scripting.FileSystemObject");

-if (!FSObject.FileExists(prolog_path)) {
-	WScript.Echo("Error! Cannot find spwin.exe at the expected place!");
+if (FSObject.FileExists(prolog_path4)) {
+	prolog_path = prolog_path4;
+	config_file = "sicstus4.config";
+}
+else if (FSObject.FileExists(prolog_path3)) {
+	prolog_path = prolog_path3;
+	config_file = "sicstus.config";
+}
+else {
+	WScript.Echo("Error! Cannot find spwin.exe at the expected places!");
 	WScript.Echo("Please, edit the script and update the location of the spwin.exe executable.");
 	WScript.Quit(1);
 }
@@ -57,7 +86,7 @@ if (!FSObject.FolderExists(logtalk_home + "\\bin"))

 var f = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_sicstus.pl", true);

-f.WriteLine(":- consult('$LOGTALKUSER/configs/sicstus.config').");
+f.WriteLine(":- consult('$LOGTALKUSER/configs/" + config_file + "').");
 f.WriteLine(":- consult('$LOGTALKHOME/compiler/logtalk.pl').");
 f.WriteLine(":- consult('$LOGTALKUSER/libpaths/libpaths.pl').");
 f.Close();
@@ -68,9 +97,9 @@ if (!FSObject.FolderExists(ProgramsPath + "\\Logtalk"))
 	FSObject.CreateFolder(ProgramsPath + "\\Logtalk");

 var link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk - SICStus Prolog.lnk");
-link.Arguments = "-l %LOGTALKHOME%\\bin\\logtalk_sicstus.pl";
-link.Description = "Runs Logtalk with SICStus Prolog";
-link.IconLocation = "app.exe,1";
+link.Arguments = '-l "%LOGTALKHOME%\\bin\\logtalk_sicstus.pl"';
+link.Description = 'Runs Logtalk with SICStus Prolog';
+link.IconLocation = 'app.exe,1';
 link.TargetPath = prolog_path;
 link.WindowStyle = 1;
 link.WorkingDirectory = logtalk_home;
--- a/Logtalk/scripts/make_sicstuslgt.sh
+++ b/Logtalk/scripts/make_sicstuslgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -41,15 +41,23 @@ fi
 cd "$LOGTALKHOME"
 mkdir -p bin
 cd bin
-echo ":- compile('\$LOGTALKUSER/configs/sicstus.config')." > logtalk_sicstus.rc
-echo ":- compile('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_sicstus.rc
-echo ":- compile('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_sicstus.rc
+if sicstus -f --goal "halt." 2>&1 | grep "SICStus 4" 2>&1 >/dev/null; then
+	echo ":- compile('\$LOGTALKUSER/configs/sicstus4.config')." > logtalk_sicstus.pl
+	sed -e '/call_with_args/ s//call/g' ../compiler/logtalk.pl > logtalk_comp_sicstus.pl
+	echo ":- compile('\$LOGTALKHOME/bin/logtalk_comp_sicstus.pl')." >> logtalk_sicstus.pl
+else
+	echo ":- compile('\$LOGTALKUSER/configs/sicstus.config')." > logtalk_sicstus.pl
+	echo ":- compile('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_sicstus.pl
+fi
+echo ":- compile('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_sicstus.pl

 echo "#/bin/sh" > sicstuslgt
-echo "sicstus -l \$LOGTALKHOME/bin/logtalk_sicstus.rc" >> sicstuslgt
+echo "sicstus -l \$LOGTALKHOME/bin/logtalk_sicstus.pl" >> sicstuslgt
 chmod a+x sicstuslgt
 ln -sf $LOGTALKHOME/bin/sicstuslgt $prefix/bin/sicstuslgt
 echo "Done. A link to the script was been created in $prefix/bin."
-echo "Users must define the environment variables LOGTALKHOME and"
-echo "LOGTALKUSER in order to use the script."
+echo
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "once prior to using the sicstuslgt script."
 echo
--- a/Logtalk/scripts/make_swilgt.js
+++ b/Logtalk/scripts/make_swilgt.js
@@ -1,6 +1,6 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================
@@ -55,18 +55,26 @@ logtalk_home = logtalk_home.replace(/\\/g, "\\\\");
 if (!FSObject.FolderExists(logtalk_home + "\\bin"))
 	FSObject.CreateFolder(logtalk_home + "\\bin");

-var f = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_swi.pl", true);
-f.WriteLine(":- system_module.");
-f.Close();
+var f1 = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_comp_swi.pl", true);
+var f2 = FSObject.OpenTextFile(logtalk_home + "\\compiler\\logtalk.pl", 1);
+var line;

-WshShell.Run("cmd /c type " + logtalk_home + "\\compiler\\logtalk.pl" + " >> " + logtalk_home + "\\bin\\logtalk_swi.pl", true);
+f1.WriteLine(":- system_module.");
+while (!f2.AtEndOfStream) {
+	line = f2.ReadLine();
+	f1.WriteLine(line);
+}

-f = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_swi.rc", true);
+f1.Close();
+f2.Close();
+
+f = FSObject.CreateTextFile(logtalk_home + "\\bin\\logtalk_swi.init", true);

-f.WriteLine(":- consult('$LOGTALKUSER/configs/swihook.pl').");
 f.WriteLine(":- consult('$LOGTALKUSER/configs/swi.config').");
-f.WriteLine(":- consult('$LOGTALKHOME/bin/logtalk_swi.pl').");
+f.WriteLine(":- consult('$LOGTALKHOME/bin/logtalk_comp_swi.pl').");
 f.WriteLine(":- consult('$LOGTALKUSER/libpaths/libpaths.pl').");
+f.WriteLine(":- consult('$LOGTALKUSER/configs/swihook.pl').");
+f.WriteLine(":- consult('$LOGTALKUSER/configs/xpcehook.pl').");
 f.Close();

 var ProgramsPath = WshShell.SpecialFolders("AllUsersPrograms");
@@ -75,9 +83,9 @@ if (!FSObject.FolderExists(ProgramsPath + "\\Logtalk"))
 	FSObject.CreateFolder(ProgramsPath + "\\Logtalk");

 var link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk - SWI-Prolog.lnk");
-link.Arguments = "-f %LOGTALKHOME%\\bin\\logtalk_swi.rc";
-link.Description = "Runs Logtalk with SWI-Prolog";
-link.IconLocation = "app.exe,1";
+link.Arguments = '-f "%LOGTALKHOME%\\bin\\logtalk_swi.init"';
+link.Description = 'Runs Logtalk with SWI-Prolog';
+link.IconLocation = 'app.exe,1';
 link.TargetPath = prolog_path;
 link.WindowStyle = 1;
 link.WorkingDirectory = logtalk_home;
--- a/Logtalk/scripts/make_swilgt.sh
+++ b/Logtalk/scripts/make_swilgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -41,20 +41,24 @@ fi
 cd "$LOGTALKHOME"
 mkdir -p bin
 cd bin
-echo ":- system_module." > logtalk_swi.pl
-cat ../compiler/logtalk.pl >> logtalk_swi.pl
-echo ":- consult('\$LOGTALKUSER/configs/swi.config')." > logtalk_swi.rc
-echo ":- consult('\$LOGTALKUSER/configs/swihook.pl')." >> logtalk_swi.rc
-echo ":- consult('\$LOGTALKHOME/bin/logtalk_swi.pl')." >> logtalk_swi.rc
-echo ":- consult('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_swi.rc
+echo ":- set_prolog_flag(generate_debug_info, false)." > logtalk_comp_swi.pl
+echo ":- system_module." >> logtalk_comp_swi.pl
+cat ../compiler/logtalk.pl >> logtalk_comp_swi.pl
+echo ":- consult('\$LOGTALKUSER/configs/swi.config')." > logtalk_swi.pl
+echo ":- consult('\$LOGTALKHOME/bin/logtalk_comp_swi.pl')." >> logtalk_swi.pl
+echo ":- consult('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_swi.pl
+echo ":- consult('\$LOGTALKUSER/configs/swihook.pl')." >> logtalk_swi.pl
+echo ":- consult('\$LOGTALKUSER/configs/xpcehook.pl')." >> logtalk_swi.pl
 echo "#/bin/sh" > swilgt
 case $( uname -s ) in
-	Darwin	) echo "swipl -f \$LOGTALKHOME/bin/logtalk_swi.rc" >> swilgt;;
-	*		) echo "pl -f \$LOGTALKHOME/bin/logtalk_swi.rc" >> swilgt;;
+	Darwin	) echo "swipl -f \$LOGTALKHOME/bin/logtalk_swi.pl" >> swilgt;;
+	*		) echo "pl -f \$LOGTALKHOME/bin/logtalk_swi.pl" >> swilgt;;
 esac
 chmod a+x swilgt
 ln -sf $LOGTALKHOME/bin/swilgt $prefix/bin/swilgt
 echo "Done. A link to the script was been created in $prefix/bin."
-echo "Users must define the environment variables LOGTALKHOME and"
-echo "LOGTALKUSER in order to use the script."
+echo
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "once prior to using the swilgt script."
 echo
--- a/Logtalk/scripts/make_xsblgt.sh
+++ b/Logtalk/scripts/make_xsblgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -41,23 +41,18 @@ fi
 cd "$LOGTALKHOME"
 mkdir -p bin
 cd bin
-cp ../compiler/logtalk.pl logtalk.P
-sed 's/^..lgt_current_object_.[(]user.*[)]/:- assertz(&)/' logtalk.P > temp1
-sed 's/^..lgt_current_object_.[(]debugger.*[)]/:- assertz(&)/' temp1 > temp2
-sed 's/^..lgt_dbg_leashing_.[(].*[)]/:- assertz(&)/g' temp2 > logtalk.P
-rm temp1
-rm temp2
-echo ":- reconsult('$LOGTALKUSER/configs/xsb.P')." > logtalkxsb.P
-echo ":- reconsult('$LOGTALKHOME/bin/logtalk.P')." >> logtalkxsb.P
-echo ":- reconsult('$LOGTALKUSER/libpaths/libpaths.P')." >> logtalkxsb.P
+echo ":- reconsult('~/logtalk/configs/xsb.pl')." > logtalk_xsb.pl
+echo ":- reconsult('$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_xsb.pl
+echo ":- reconsult('~/logtalk/libpaths/libpaths_no_env_var.pl')." >> logtalk_xsb.pl
 echo "#/bin/sh" > xsblgt
-echo "xsb -e \"reconsult('\$LOGTALKHOME/bin/logtalkxsb.P').\"" >> xsblgt
+echo "xsb -l -e \"reconsult('$LOGTALKHOME/bin/logtalk_xsb.pl').\"" >> xsblgt
 chmod a+x xsblgt
 ln -sf $LOGTALKHOME/bin/xsblgt $prefix/bin/xsblgt
 echo "Done. A link to the script was been created in $prefix/bin."
-echo "Users must define the environment variables LOGTALKHOME and"
-echo "LOGTALKUSER in order to use the script. Users must run the"
-echo "the cplgtdirs script before using the xsblgt script."
+echo "The first call to the script the must be made as root or using"
+echo "sudo."
 echo
-echo "The first call to the script must be made as root or using sudo."
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "prior to using the xsblgt script."
 echo
--- a/Logtalk/scripts/make_yaplgt.js
+++ b/Logtalk/scripts/make_yaplgt.js
@@ -1,10 +1,15 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================

+if (ScriptEngineMajorVersion() < 5 || ScriptEngineMajorVersion() == 5 && ScriptEngineMinorVersion() < 6) {
+	WScript.Echo('Error! WSH 5.6 or later version needed for running this script.');
+	WScript.Quit(1);
+}
+
 var prolog_path = "C:\\Yap\\bin\\yap.exe";

 if (WScript.Arguments.Unnamed.Length > 0) {
@@ -68,9 +73,9 @@ if (!FSObject.FolderExists(ProgramsPath + "\\Logtalk"))
 	FSObject.CreateFolder(ProgramsPath + "\\Logtalk");

 var link = WshShell.CreateShortcut(ProgramsPath + "\\Logtalk\\Logtalk - YAP.lnk");
-link.Arguments = "-l %LOGTALKHOME%\\bin\\logtalk_yap.pl";
-link.Description = "Runs Logtalk with YAP";
-link.IconLocation = "app.exe,1";
+link.Arguments = '-l "%LOGTALKHOME%\\bin\\logtalk_yap.pl"';
+link.Description = 'Runs Logtalk with YAP';
+link.IconLocation = 'app.exe,1';
 link.TargetPath = prolog_path;
 link.WindowStyle = 1;
 link.WorkingDirectory = logtalk_home;
--- a/Logtalk/scripts/make_yaplgt.sh
+++ b/Logtalk/scripts/make_yaplgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -41,15 +41,17 @@ fi
 cd "$LOGTALKHOME"
 mkdir -p bin
 cd bin
-echo ":- reconsult('\$LOGTALKUSER/configs/yap.config')." > logtalk_yap.rc
-echo ":- reconsult('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_yap.rc
-echo ":- reconsult('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_yap.rc
+echo ":- reconsult('\$LOGTALKUSER/configs/yap.config')." > logtalk_yap.pl
+echo ":- reconsult('\$LOGTALKHOME/compiler/logtalk.pl')." >> logtalk_yap.pl
+echo ":- reconsult('\$LOGTALKUSER/libpaths/libpaths.pl')." >> logtalk_yap.pl

 echo "#/bin/sh" > yaplgt
-echo "yap -s 49152 -h 16384 -t 1024 -l \$LOGTALKHOME/bin/logtalk_yap.rc" >> yaplgt
+echo "yap -s 49152 -h 16384 -t 1024 -l \$LOGTALKHOME/bin/logtalk_yap.pl" >> yaplgt
 chmod a+x yaplgt
 ln -sf $LOGTALKHOME/bin/yaplgt $prefix/bin/yaplgt
 echo "Done. A link to the script was been created in $prefix/bin."
-echo "Users must define the environment variables LOGTALKHOME and"
-echo "LOGTALKUSER in order to use the script."
+echo
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "once prior to using the yaplgt script."
 echo
--- a/Logtalk/scripts/makeall_lgt.js
+++ b/Logtalk/scripts/makeall_lgt.js
@@ -1,10 +1,15 @@
 // =================================================================
 // Logtalk - Object oriented extension to Prolog
-// Release 2.27.1
+// Release 2.28.2
 //
 // Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 // =================================================================

+if (ScriptEngineMajorVersion() < 5 || ScriptEngineMajorVersion() == 5 && ScriptEngineMinorVersion() < 6) {
+	WScript.Echo('Error! WSH 5.6 or later version needed for running this script.');
+	WScript.Quit(1);
+}
+
 WScript.Echo('');
 WScript.Echo('Creating shortcuts for running Logtalk with selected Prolog compilers...');
 WScript.Echo('');
@@ -34,6 +39,9 @@ if (!FSObject.FolderExists(logtalk_home)) {
 	WScript.Quit(1);
 }

+WScript.Echo('Creating shortcut Logtalk - B-Prolog...');
+WshShell.Run("cscript %LOGTALKHOME%\\scripts\\make_bplgt.js", true);
+
 WScript.Echo('Creating shortcut Logtalk - CIAO...');
 WshShell.Run("cscript %LOGTALKHOME%\\scripts\\make_ciaolgt.js", true);
 	
@@ -52,24 +60,24 @@ WshShell.Run("cscript %LOGTALKHOME%\\scripts\\make_sicstuslgt.js", true);
 WScript.Echo('Creating shortcut Logtalk - SWI-Prolog...');
 WshShell.Run("cscript %LOGTALKHOME%\\scripts\\make_swilgt.js", true);

-WScript.Echo('Creating shortcut Logtalk - XSB CVS...');
-WshShell.Run("cscript %LOGTALKHOME%\\scripts\\make_xsbcvslgt.js", true);
+WScript.Echo('Creating shortcut Logtalk - XSB...');
+WshShell.Run("cscript %LOGTALKHOME%\\scripts\\make_xsblgt.js", true);

 WScript.Echo('Creating shortcut Logtalk - YAP...');
 WshShell.Run("cscript %LOGTALKHOME%\\scripts\\make_yaplgt.js", true);

 WScript.Echo('');
-WScript.Echo('Done.  Links to the created scripts was been added to the Start Menu');
-WScript.Echo('Programs.   Make sure that the environment variables LOGTALKHOME and');
-WScript.Echo('LOGTALKUSER are defined for all users wishing to use the shortcuts.');
+WScript.Echo('Done. Links to the created shortcuts are availasble from the Start Menu');
+WScript.Echo('Logtalk program group. Ensure that the environment variables LOGTALKHOME');
+WScript.Echo('and LOGTALKUSER are defined for all users wishing to use the shortcuts.');
 WScript.Echo('');
-WScript.Echo('Users must run the batch script "cplgtdirs" before using the Logtalk -');
-WScript.Echo('Prolog integration scripts.');
+WScript.Echo('Users must run the batch script "cplgtdirs" once prior to using the');
+WScript.Echo('Logtalk - Prolog integration scripts.');
 WScript.Echo('');
-WScript.Echo('If you get an unexpected failure to create a shortcut for one of the');
-WScript.Echo('above Prolog compilers, make sure that the Prolog compiler is properly');
-WScript.Echo('installed, consult the NOTES file on the scripts directory, and try to');
-WScript.Echo('run the corresponding script individually.');
+WScript.Echo('If you get an unexpected failure when creating or using a shortcut for');
+WScript.Echo('one of the above Prolog compilers, make sure that the Prolog compiler');
+WScript.Echo('is properly installed, consult the NOTES file on the scripts directory,');
+WScript.Echo('and try to run the corresponding script individually.');
 WScript.Echo('');

 WScript.Quit(0);
--- a/Logtalk/scripts/makeall_lgt.sh
+++ b/Logtalk/scripts/makeall_lgt.sh
@@ -2,7 +2,7 @@

 ## =================================================================
 ## Logtalk - Object oriented extension to Prolog
-## Release 2.27.1
+## Release 2.28.2
 ##
 ## Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ## =================================================================
@@ -38,71 +38,71 @@ if ! [ -d "$prefix" ]; then
 	exit 1
 fi

+./make_bplgt.sh $prefix > /dev/null 2> /dev/null
+if [ $? = 0 ] ; then
+	echo "bplgt script created"
+else
+	echo "bplgt script creation failed"
+fi
+
 ./make_ciaolgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? = 0 ] ; then
 	echo "ciaolgt script created"
 else
 	echo "ciaolgt script creation failed"
 fi

 ./make_eclipselgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? = 0 ] ; then
 	echo "eclipselgt script created"
 else
 	echo "eclipselgt script creation failed"
 fi

 ./make_gplgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? = 0 ] ; then
 	echo "gplgt script created"
 else
 	echo "gplgt script creation failed"
 fi

 ./make_plclgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? = 0 ] ; then
 	echo "plclgt script created"
 else
 	echo "plclgt script creation failed"
 fi

 ./make_qplgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? = 0 ] ; then
 	echo "qplgt script created"
 else
 	echo "qplgt script creation failed"
 fi

 ./make_sicstuslgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? = 0 ] ; then
 	echo "sicstuslgt script created"
 else
 	echo "sicstuslgt script creation failed"
 fi

 ./make_swilgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? = 0 ] ; then
 	echo "swilgt script created"
 else
 	echo "swilgt script creation failed"
 fi

 ./make_xsblgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? = 0 ] ; then
 	echo "xsblgt script created"
 else
 	echo "xsblgt script creation failed"
 fi

-./make_xsbcvslgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
-	echo "xsbcvslgt script created"
-else
-	echo "xsbcvslgt script creation failed"
-fi
-
 ./make_yaplgt.sh $prefix > /dev/null 2> /dev/null
-if [[ $? -eq 0 ]]; then
+if [ $? = 0 ] ; then
 	echo "yaplgt script created"
 else
 	echo "yaplgt script creation failed"
@@ -111,10 +111,14 @@ fi
 echo
 echo "Done. Links to the created scripts can be found on $prefix/bin."
 echo "Make sure that the Prolog compilers are also available on your "
-echo "execution path.  Users must define the environment variables "
-echo "LOGTALKHOME and LOGTALKUSER in order to use the scripts."
+echo "execution path."
 echo
-echo "If you get an unexpected failure to create a shortcut for one of the"
-echo "above Prolog compilers, please consult the NOTES file on the scripts"
-echo "directory or try to run the corresponding script individually."
+echo "If you got an unexpected failure when creating or using one of the"
+echo "Prolog integration scripts, make sure that the Prolog compiler is"
+echo "properly installed, consult the NOTES file on the scripts directory,"
+echo "and try to run the corresponding script individually."
+echo
+echo "Users should ensure that the environment variables LOGTALKHOME"
+echo "and LOGTALKUSER are defined and then run the \"cplgtdirs\" script"
+echo "once prior to using the Prolog integration scripts."
 echo