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[Emacs-diffs] emacs-25 9b1aab9: Port run-prolog EMACS to SWI-Prolog 7.2.
From: |
Paul Eggert |
Subject: |
[Emacs-diffs] emacs-25 9b1aab9: Port run-prolog EMACS to SWI-Prolog 7.2.3 |
Date: |
Mon, 11 Apr 2016 05:47:24 +0000 |
branch: emacs-25
commit 9b1aab91fc479be9a923af1874801eadc1c19b20
Author: Paul Eggert <address@hidden>
Commit: Paul Eggert <address@hidden>
Port run-prolog EMACS to SWI-Prolog 7.2.3
* lisp/progmodes/prolog.el (prolog-ensure-process):
Work around incompatibility of SWI-Prolog 7.2.3 and earlier
with the new way of dealing with the EMACS and INSIDE_EMACS
environment variables.
---
lisp/progmodes/prolog.el | 16 ++++++++++++++--
1 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/lisp/progmodes/prolog.el b/lisp/progmodes/prolog.el
index 9ee405b..212a5fa 100644
--- a/lisp/progmodes/prolog.el
+++ b/lisp/progmodes/prolog.el
@@ -1374,8 +1374,20 @@ the variable `prolog-prompt-regexp'."
()
(with-current-buffer (get-buffer-create "*prolog*")
(prolog-inferior-mode)
- (apply 'make-comint-in-buffer "prolog" (current-buffer)
- (prolog-program-name) nil (prolog-program-switches))
+
+ ;; The "INFERIOR=yes" hack is for SWI-Prolog 7.2.3 and earlier,
+ ;; which assumes it is running under Emacs if either INFERIOR=yes or
+ ;; if EMACS is set to a nonempty value. The EMACS setting is
+ ;; obsolescent, so set INFERIOR. Newer versions of SWI-Prolog should
+ ;; know about INSIDE_EMACS (which replaced EMACS) and should not need
+ ;; this hack.
+ (let ((process-environment
+ (if (getenv "INFERIOR")
+ process-environment
+ (cons "INFERIOR=yes" process-environment))))
+ (apply 'make-comint-in-buffer "prolog" (current-buffer)
+ (prolog-program-name) nil (prolog-program-switches)))
+
(unless prolog-system
;; Setup auto-detection.
(setq-local
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