[COMMIT] Don't sniff the file-name-coding-system for OS X; use utf-8.

[Aidan Kehoe]

APPROVE COMMIT

NOTE: This patch has been committed.

lisp/ChangeLog addition:

2007-06-03  Aidan Kehoe  <kehoea at parhasard.net>

	* mule/mule-cmds.el:
	* mule/mule-cmds.el (system-type-file-name-coding): New.
	* mule/mule-cmds.el (set-language-environment-coding-systems):
	Check system-type-file-name-coding for an entry before making the
	file-name coding system alias equivalent to the native coding
	system alias. 


XEmacs Trunk source patch:
Diff command:   cvs -q diff -Nu
Files affected: lisp/mule/mule-cmds.el
===================================================================
RCS

Index: lisp/mule/mule-cmds.el
===================================================================
RCS file: /pack/xemacscvs/XEmacs/xemacs/lisp/mule/mule-cmds.el,v
retrieving revision 1.31
diff -u -u -r1.31 mule-cmds.el
--- lisp/mule/mule-cmds.el	2006/12/30 17:04:32	1.31
+++ lisp/mule/mule-cmds.el	2007/06/03 17:14:32
@@ -73,6 +73,14 @@
   (let ((coding-system-for-read 'iso-2022-7bit))
     (find-file-read-only (expand-file-name "HELLO" data-directory))))
 
+(defvar system-type-file-name-coding
+  '((darwin . utf-8))
+  "A map from values of `system-type' to invariant file name coding systems.
+Used if a give system type does not vary in the coding system it uses for
+file names; otherwise, `language-info-alist' is consulted for this
+information.  This affects the `file-name' coding system alias, but not the
+`file-name-coding-system' variable, which in practice is mostly ignored. ")
+
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;;                       Language Support Functions                    ;;;
@@ -1377,7 +1385,11 @@
 	(error
 	 (warn "Invalid native-coding-system %s in language environment %s"
 	       native language-name)))
-      (define-coding-system-alias 'file-name 'native)
+      (define-coding-system-alias 'file-name 
+        (or 
+         (let ((fncs (assq system-type system-type-file-name-coding)))
+           (and fncs (cdr fncs)))
+         'native))
       ;; Set the default keyboard and terminal coding systems to the native
       ;; coding system of the language environment. 
       ;;

-- 
On the quay of the little Black Sea port, where the rescued pair came once
more into contact with civilization, Dobrinton was bitten by a dog which was
assumed to be mad, though it may only have been indiscriminating. (Saki)