A prolog mode for Emacs, modified from Sicstus Prolog, itself modified from the Emacs original prolog mode.
Add the following lines to your .emacs, replacing <installation path>
by the directory where the archive has been extracted.
; - Prolog (load "<installation path>/prolog-mode/prolog.el")
This will autoload and use the prolog-mode when a file with the extension .pl or .pro or .chr is loaded. For .pl, it will do this except if the file begins with a perl shebang line. It will use Sicstus as default back-end except for .chr for which SWI Prolog is preferred.
To use GNU Prolog as default back-end:
(add-hook 'prolog-mode-hook
(lambda ()
(set-prolog-system 'gprolog)))
The back-end may be changed by clicking on the back-end related button on the mode line or with M-x set-prolog-system.
The current buffer is saved and consulted with C-c C-f. If it is the first time you consult this buffer for the selected back-end, you are requested for a Prolog session name: by default, the name of the back-end is used as session name. You can change the session afterward by clicking on the dedicated button on the mode line or with M-x set-prolog-session.
Download prolog-mode.tar.gz.