60 lines
2.6 KiB
Plaintext
60 lines
2.6 KiB
Plaintext
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=================================================================
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Logtalk - Object oriented extension to Prolog
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Release 2.17.0
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Copyright (c) 1998-2004 Paulo Moura. All Rights Reserved.
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=================================================================
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Installing Logtalk is just a matter of decompressing the downloaded
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archive and copying the resulting directory to a suitable location.
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The Logtalk directory can reside in any user accessible location.
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This location depends on the working environment and on the number
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of users. The "misc" sub-directory contains some shell scripts for
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easy installation of Logtalk on Unix and Unix-like operating systems.
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INSTALLING FOR A SINGLE USER
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In the case of a single user, the Logtalk directory can simply be
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copied to the user home directory.
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INSTALLING FOR MULTIPLE USERS
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In the case of multiple users, the Logtalk directory can be copied to
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any location that its accessible by all the users.
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Regarding directory and file permissions, it is advisable to make all files
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read-only in order to avoid user tempering. However, the library and examples
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sub-directories (and possibly the compiler sub-directory, depending on the
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chosen Prolog compiler) must be user writable as compiling Logtalk source
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files generates intermediate Prolog files, which are written to the same
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location as the source files. However, making directories world-writable is a
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security risk. There are two alternatives. The first one is to pre-compile the
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library and all examples and to turn on the compiler option "smart_compilation"
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in order to avoid the need of recompilation when the files are loaded by the
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users. The second alternative is to copy the Logtalk xml, examples, and library
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directories to each user directory (the "misc" sub-directory contains a shell
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script for automating these copies).
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ENVIRONMENT VARIABLES
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In Unix and Unix-like systems is recommended that you define an environment
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variable named $LOGTALKHOME pointing to the Logtalk installation for use with
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your Prolog compilers. If you use a csh shell, add the following line to your
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~/.cshrc file:
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setenv LOGTALKHOME "/your/installation/directory/lgt2170"
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If you use a bash shell, add the following lines to your ~/.profile file:
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LOGTALKHOME="/your/installation/directory/lgt2170"
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export LOGTALKHOME
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When using the provided shell script for installing Logtalk, a symbolic link
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to the Logtalk installation directory is automatically created. The link is
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named "logtalk". In this case, use this symbolic link to define the
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environment variable in order to avoid breaking it when upgrading Logtalk.
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