Package: swi-prolog-nox Version: 5.10.1-1 Severity: minor swi-prolog installs a symlink from /usr/bin/prolog to /usr/bin/swipl using the Debian alternatives mechanism. However, it behaves differently depending on whether it is invoked as "prolog" or "swipl". For example, if swi-prolog-x is installed, "swipl -g emacs" starts SWI Prolog's emacs-like editor, but "prolog -g emacs" gives an error.
The reason for this is that the swipl binary uses the name it is invoked with to locate its start-up file (see the description of the -F option in swipl(1)). Specifically, if invoked as "prolog", it looks for a start-up file under /usr/lib/swi-prolog/prolog.rc and various related names, none of which exist. This can be observed by running "strace prolog -g halt". If invoked as "swipl", it successfully loads /usr/lib/swi-prolog/swipl.rc Suggested fixes, all untested: * create a shell script wrapper that runs swipl and point the /usr/bin/prolog symlink at that. * create a symlink /usr/lib/swi-prolog/prolog.rc pointing to /usr/lib/swi-prolog/swipl.rc The binary /usr/bin/xpce in the swi-prolog-x package, which is also a symlink to the swipl binary, seems to be affected by similar problems: It tries to load /usr/lib/swi-prolog/xpce.rc, which doesn't exist (though /usr/lib/swi-prolog/xpce-6.6.66/pl/xpce.rc does). -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
