* mh-compat.el (mh-define-obsolete-variable-alias)

(mh-make-obsolete-variable): New macros to fix XEmacs compiler
warnings.

* mh-letter.el (mh-yank-hooks): Use new mh-make-obsolete-variable
macro.

* mh-e.el (mh-kill-folder-suppress-prompt-hooks): Use new
mh-define-obsolete-variable-alias macro.

* mh-compat.el (mh-cl-flet): New alias for cl-flet on Emacs 24 and
flet elsewhere.

* mh-thread.el (mh-thread-set-tables): Replace flet with new alias
mh-cl-flet.

* mh-show.el (mh-gnus-article-highlight-citation): Replace flet with
new alias mh-cl-flet.

* mh-mime.el (mh-display-with-external-viewer, mh-mime-display)
(mh-press-button, mh-push-button, mh-display-emphasis): Replace flet
with new alias mh-cl-flet.

* mh-e.el (mh-invisible-header-fields-internal): Remove trailing
  whitespace.

8 files changed, 161 insertions, 86 deletions

diff --git a/lisp/mh-e/ChangeLog b/lisp/mh-e/ChangeLog
index 94ecfa138fe..75a06d39697 100644
--- a/lisp/mh-e/ChangeLog
+++ b/lisp/mh-e/ChangeLog
@@ -1,3 +1,30 @@
+2012-11-25  Bill Wohler  <wohler@newt.com>
+
+        * mh-compat.el (mh-define-obsolete-variable-alias)
+        (mh-make-obsolete-variable): New macros to fix XEmacs compiler
+        warnings.
+
+        * mh-letter.el (mh-yank-hooks): Use new mh-make-obsolete-variable
+        macro.
+
+        * mh-e.el (mh-kill-folder-suppress-prompt-hooks): Use
+        new mh-define-obsolete-variable-alias macro.
+
+        * mh-compat.el (mh-cl-flet): New alias for cl-flet on Emacs 24 and
+        flet elsewhere.
+
+        * mh-thread.el (mh-thread-set-tables): Replace flet with new alias
+        mh-cl-flet.
+
+        * mh-show.el (mh-gnus-article-highlight-citation):  Replace flet with new alias
+        mh-cl-flet.
+
+        * mh-mime.el (mh-display-with-external-viewer, mh-mime-display)
+        (mh-press-button, mh-push-button, mh-display-emphasis): Replace
+        flet with new alias mh-cl-flet.
+
+        * mh-e.el (mh-invisible-header-fields-internal): Remove trailing whitespace.
+
 2012-11-25  Jeffrey C Honig  <jch@honig.net>
 
         * mh-comp.el: (mh-edit-again): Use the components file to specify
@@ -10,8 +37,7 @@
         (mh-find-components, mh-send-sub): Move code to locate components
         file into a new function.
         (mh-insert-auto-fields, mh-modify-header-field): New syntax for
-        calling mh-regexp-in-field-p.
-        (closes SF #1708292)
+        calling mh-regexp-in-field-p (closes SF #1708292).
 
 2012-10-23  Stefan Monnier  <monnier@iro.umontreal.ca>
 
diff --git a/lisp/mh-e/mh-comp.el b/lisp/mh-e/mh-comp.el
index d34de619268..3b24afd89ce 100644
--- a/lisp/mh-e/mh-comp.el
+++ b/lisp/mh-e/mh-comp.el
@@ -888,7 +888,7 @@ Optional argument BUFFER can be used to specify the buffer."
      (t
       (error "Can't find %s in %s or %s"
              mh-comp-formfile mh-user-path mh-lib)))))
-  
+
 (defun mh-send-sub (to cc subject config)
   "Do the real work of composing and sending a letter.
 Expects the TO, CC, and SUBJECT fields as arguments.
@@ -1204,7 +1204,7 @@ discarded."
                         (setq syntax-table mh-fcc-syntax-table))
                        (t
                         (setq syntax-table (syntax-table)))
-                       )))           
+                       )))
                 (if (and (mh-goto-header-field field)
                          (set-syntax-table syntax-table)
                          (re-search-forward
diff --git a/lisp/mh-e/mh-compat.el b/lisp/mh-e/mh-compat.el
index 4a93109e7a4..973a5ca5833 100644
--- a/lisp/mh-e/mh-compat.el
+++ b/lisp/mh-e/mh-compat.el
@@ -75,6 +75,12 @@ introduced in Emacs 22."
       'cancel-timer
     'delete-itimer))
 
+;; Emacs 24 renamed flet to cl-flet.
+(defalias 'mh-cl-flet
+  (if (fboundp 'cl-flet)
+      'cl-flet
+    'flet))
+
 (defun mh-display-color-cells (&optional display)
   "Return the number of color cells supported by DISPLAY.
 This function is used by XEmacs to return 2 when `device-color-cells'
@@ -242,6 +248,40 @@ This function returns nil on those systems."
 This function returns nil on those systems."
   nil)
 
+(defmacro mh-define-obsolete-variable-alias
+  (obsolete-name current-name &optional when docstring)
+  "Make OBSOLETE-NAME a variable alias for CURRENT-NAME and mark it obsolete.
+See documentation for `define-obsolete-variable-alias' for a description
+of the arguments OBSOLETE-NAME, CURRENT-NAME, and perhaps WHEN
+and DOCSTRING. This macro is used by XEmacs that lacks WHEN and
+DOCSTRING arguments."
+  (if (featurep 'xemacs)
+      `(define-obsolete-variable-alias ,obsolete-name ,current-name)
+    `(define-obsolete-variable-alias ,obsolete-name ,current-name ,when ,docstring)))
+
+(defmacro mh-make-obsolete-variable (obsolete-name current-name &optional when access-type)
+  "Make the byte-compiler warn that OBSOLETE-NAME is obsolete.
+See documentation for `make-obsolete-variable' for a description
+of the arguments OBSOLETE-NAME, CURRENT-NAME, and perhaps WHEN
+and ACCESS-TYPE. This macro is used by XEmacs that lacks WHEN and
+ACCESS-TYPE arguments."
+  (if (featurep 'xemacs)
+      `(make-obsolete-variable ,obsolete-name ,current-name)
+    `(make-obsolete-variable ,obsolete-name ,current-name ,when ,access-type)))
+
+(defmacro mh-make-obsolete-variable (obsolete-name current-name &optional when access-type)
+  "Make the byte-compiler warn that OBSOLETE-NAME is obsolete.
+See documentation for `make-obsolete-variable' for a description
+of the arguments OBSOLETE-NAME, CURRENT-NAME, and perhaps WHEN
+and ACCESS-TYPE. This macro is used by XEmacs that lacks WHEN and
+ACCESS-TYPE arguments and by Emacs versions that lack ACCESS-TYPE,
+introduced in Emacs 24."
+  (if (featurep 'xemacs)
+      `(make-obsolete-variable ,obsolete-name ,current-name)
+    (if (< emacs-major-version 24)
+        `(make-obsolete-variable ,obsolete-name ,current-name ,when)
+      `(make-obsolete-variable ,obsolete-name ,current-name ,when ,access-type))))
+
 (defun-mh mh-match-string-no-properties
   match-string-no-properties (num &optional string)
   "Return string of text matched by last search, without text properties.
diff --git a/lisp/mh-e/mh-e.el b/lisp/mh-e/mh-e.el
index 94905e7984f..20739ca9d82 100644
--- a/lisp/mh-e/mh-e.el
+++ b/lisp/mh-e/mh-e.el
@@ -2671,7 +2671,7 @@ of citations entirely, choose \"None\"."
     "X-MailScanner"                     ; ListProc(tm) by CREN
     "X-Mailutils-Message-Id"            ; GNU Mailutils
     "X-Majordomo:"                      ; Majordomo mailing list manager
-    "X-Match:"                          
+    "X-Match:"
     "X-MaxCode-Template:"               ; Paypal http://www.paypal.com
     "X-MB-Message-"                     ; AOL WebMail
     "X-MDaemon-Deliver-To:"
@@ -3276,7 +3276,7 @@ function used to insert the signature with
   :group 'mh-letter
   :package-version '(MH-E . "8.0"))
 
-(define-obsolete-variable-alias 'mh-kill-folder-suppress-prompt-hooks
+(mh-define-obsolete-variable-alias 'mh-kill-folder-suppress-prompt-hooks
   'mh-kill-folder-suppress-prompt-functions "24.3")
 (defcustom-mh mh-kill-folder-suppress-prompt-functions '(mh-search-p)
   "Abnormal hook run at the beginning of \\<mh-folder-mode-map>\\[mh-kill-folder].
diff --git a/lisp/mh-e/mh-letter.el b/lisp/mh-e/mh-letter.el
index 47554ce66a3..8965439a275 100644
--- a/lisp/mh-e/mh-letter.el
+++ b/lisp/mh-e/mh-letter.el
@@ -68,7 +68,7 @@ citation text as modified.
 
 This is a normal hook, misnamed for historical reasons.
 It is obsolete and is only used if `mail-citation-hook' is nil.")
-(make-obsolete-variable 'mh-yank-hooks 'mail-citation-hook "19.34")
+(mh-make-obsolete-variable 'mh-yank-hooks 'mail-citation-hook "19.34")
 
 
 
diff --git a/lisp/mh-e/mh-mime.el b/lisp/mh-e/mh-mime.el
index 66e1ba5ec69..5ce6159e2d5 100644
--- a/lisp/mh-e/mh-mime.el
+++ b/lisp/mh-e/mh-mime.el
@@ -268,10 +268,12 @@ usually reads the file \"/etc/mailcap\"."
               (buffer-read-only nil))
          (when (string-match "^[^% \t]+$" method)
            (setq method (concat method " %s")))
-         (flet ((mm-handle-set-external-undisplayer (handle function)
-                  (mh-handle-set-external-undisplayer folder handle function)))
-           (unwind-protect (mm-display-external part method)
-             (set-buffer-modified-p nil)))))
+         (mh-cl-flet
+          ((mm-handle-set-external-undisplayer
+            (handle function)
+            (mh-handle-set-external-undisplayer folder handle function)))
+          (unwind-protect (mm-display-external part method)
+            (set-buffer-modified-p nil)))))
    nil))
 
 ;;;###mh-autoload
@@ -523,47 +525,48 @@ parsed and then displayed."
   (let ((handles ())
         (folder mh-show-folder-buffer)
         (raw-message-data (buffer-string)))
-    (flet ((mm-handle-set-external-undisplayer
-            (handle function)
-            (mh-handle-set-external-undisplayer folder handle function)))
-      (goto-char (point-min))
-      (unless (search-forward "\n\n" nil t)
-        (goto-char (point-max))
-        (insert "\n\n"))
-
-      (condition-case err
-          (progn
-            ;; If needed dissect the current buffer
-            (if pre-dissected-handles
-                (setq handles pre-dissected-handles)
-              (if (setq handles (mm-dissect-buffer nil))
-                  (mh-mm-uu-dissect-text-parts handles)
-                (setq handles (mm-uu-dissect)))
-              (setf (mh-mime-handles (mh-buffer-data))
-                    (mh-mm-merge-handles handles
-                                         (mh-mime-handles (mh-buffer-data))))
-              (unless handles
-                (mh-decode-message-body)))
-
-            (cond ((and handles
-                        (or (not (stringp (car handles)))
-                            (cdr handles)))
-                   ;; Go to start of message body
-                   (goto-char (point-min))
-                   (or (search-forward "\n\n" nil t)
-                       (goto-char (point-max)))
-
-                   ;; Delete the body
-                   (delete-region (point) (point-max))
-
-                   ;; Display the MIME handles
-                   (mh-mime-display-part handles))
-                  (t
-                   (mh-signature-highlight))))
-        (error
-         (message "Could not display body: %s" (error-message-string err))
-         (delete-region (point-min) (point-max))
-         (insert raw-message-data))))))
+    (mh-cl-flet
+     ((mm-handle-set-external-undisplayer
+       (handle function)
+       (mh-handle-set-external-undisplayer folder handle function)))
+     (goto-char (point-min))
+     (unless (search-forward "\n\n" nil t)
+       (goto-char (point-max))
+       (insert "\n\n"))
+
+     (condition-case err
+         (progn
+           ;; If needed dissect the current buffer
+           (if pre-dissected-handles
+               (setq handles pre-dissected-handles)
+             (if (setq handles (mm-dissect-buffer nil))
+                 (mh-mm-uu-dissect-text-parts handles)
+               (setq handles (mm-uu-dissect)))
+             (setf (mh-mime-handles (mh-buffer-data))
+                   (mh-mm-merge-handles handles
+                                        (mh-mime-handles (mh-buffer-data))))
+             (unless handles
+               (mh-decode-message-body)))
+
+           (cond ((and handles
+                       (or (not (stringp (car handles)))
+                           (cdr handles)))
+                  ;; Go to start of message body
+                  (goto-char (point-min))
+                  (or (search-forward "\n\n" nil t)
+                      (goto-char (point-max)))
+
+                  ;; Delete the body
+                  (delete-region (point) (point-max))
+
+                  ;; Display the MIME handles
+                  (mh-mime-display-part handles))
+                 (t
+                  (mh-signature-highlight))))
+       (error
+        (message "Could not display body: %s" (error-message-string err))
+        (delete-region (point-min) (point-max))
+        (insert raw-message-data))))))
 
 (defun mh-decode-message-body ()
   "Decode message based on charset.
@@ -1046,13 +1049,14 @@ attachment, the attachment is hidden."
         (function (get-text-property (point) 'mh-callback))
         (buffer-read-only nil)
         (folder mh-show-folder-buffer))
-    (flet ((mm-handle-set-external-undisplayer
-            (handle function)
-            (mh-handle-set-external-undisplayer folder handle function)))
-      (when (and function (eolp))
-        (backward-char))
-      (unwind-protect (and function (funcall function data))
-        (set-buffer-modified-p nil)))))
+    (mh-cl-flet
+     ((mm-handle-set-external-undisplayer
+       (handle function)
+       (mh-handle-set-external-undisplayer folder handle function)))
+     (when (and function (eolp))
+       (backward-char))
+     (unwind-protect (and function (funcall function data))
+       (set-buffer-modified-p nil)))))
 
 (defun mh-push-button (event)
   "Click MIME button for EVENT.
@@ -1066,9 +1070,11 @@ to click the MIME button."
           (mm-inline-media-tests mh-mm-inline-media-tests)
           (data (get-text-property (point) 'mh-data))
           (function (get-text-property (point) 'mh-callback)))
-      (flet ((mm-handle-set-external-undisplayer (handle func)
-               (mh-handle-set-external-undisplayer folder handle func)))
-        (and function (funcall function data))))))
+      (mh-cl-flet
+       ((mm-handle-set-external-undisplayer
+         (handle func)
+         (mh-handle-set-external-undisplayer folder handle func)))
+       (and function (funcall function data))))))
 
 (defun mh-handle-set-external-undisplayer (folder handle function)
   "Replacement for `mm-handle-set-external-undisplayer'.
@@ -1160,10 +1166,11 @@ this ;-)"
 (defun mh-display-emphasis ()
   "Display graphical emphasis."
   (when (and mh-graphical-emphasis-flag (mh-small-show-buffer-p))
-    (flet ((article-goto-body ()))      ; shadow this function to do nothing
-      (save-excursion
-        (goto-char (point-min))
-        (article-emphasize)))))
+    (mh-cl-flet
+     ((article-goto-body ()))      ; shadow this function to do nothing
+     (save-excursion
+       (goto-char (point-min))
+       (article-emphasize)))))
 
 (defun mh-small-show-buffer-p ()
   "Check if show buffer is small.
diff --git a/lisp/mh-e/mh-show.el b/lisp/mh-e/mh-show.el
index ee516f8ede8..4fb9fad0919 100644
--- a/lisp/mh-e/mh-show.el
+++ b/lisp/mh-e/mh-show.el
@@ -899,13 +899,14 @@ See also `mh-folder-mode'.
   (interactive)
   ;; Don't allow Gnus to create buttons while highlighting, maybe this is bad
   ;; style?
-  (flet ((gnus-article-add-button (&rest args) nil))
-    (let* ((modified (buffer-modified-p))
-           (gnus-article-buffer (buffer-name))
-           (gnus-cite-face-list `(,@(cdr gnus-cite-face-list)
-                                    ,(car gnus-cite-face-list))))
-      (gnus-article-highlight-citation t)
-      (set-buffer-modified-p modified))))
+  (mh-cl-flet
+   ((gnus-article-add-button (&rest args) nil))
+   (let* ((modified (buffer-modified-p))
+          (gnus-article-buffer (buffer-name))
+          (gnus-cite-face-list `(,@(cdr gnus-cite-face-list)
+                                 ,(car gnus-cite-face-list))))
+     (gnus-article-highlight-citation t)
+     (set-buffer-modified-p modified))))
 
 (provide 'mh-show)
 
diff --git a/lisp/mh-e/mh-thread.el b/lisp/mh-e/mh-thread.el
index 48c06c3df87..ba2c61f1708 100644
--- a/lisp/mh-e/mh-thread.el
+++ b/lisp/mh-e/mh-thread.el
@@ -645,19 +645,20 @@ Only information about messages in MSG-LIST are added to the tree."
 
 (defun mh-thread-set-tables (folder)
   "Use the tables of FOLDER in current buffer."
-  (flet ((mh-get-table (symbol)
-                       (with-current-buffer folder
-                         (symbol-value symbol))))
-    (setq mh-thread-id-hash (mh-get-table 'mh-thread-id-hash))
-    (setq mh-thread-subject-hash (mh-get-table 'mh-thread-subject-hash))
-    (setq mh-thread-id-table (mh-get-table 'mh-thread-id-table))
-    (setq mh-thread-id-index-map (mh-get-table 'mh-thread-id-index-map))
-    (setq mh-thread-index-id-map (mh-get-table 'mh-thread-index-id-map))
-    (setq mh-thread-scan-line-map (mh-get-table 'mh-thread-scan-line-map))
-    (setq mh-thread-subject-container-hash
-          (mh-get-table 'mh-thread-subject-container-hash))
-    (setq mh-thread-duplicates (mh-get-table 'mh-thread-duplicates))
-    (setq mh-thread-history (mh-get-table 'mh-thread-history))))
+  (mh-cl-flet
+   ((mh-get-table (symbol)
+                  (with-current-buffer folder
+                    (symbol-value symbol))))
+   (setq mh-thread-id-hash (mh-get-table 'mh-thread-id-hash))
+   (setq mh-thread-subject-hash (mh-get-table 'mh-thread-subject-hash))
+   (setq mh-thread-id-table (mh-get-table 'mh-thread-id-table))
+   (setq mh-thread-id-index-map (mh-get-table 'mh-thread-id-index-map))
+   (setq mh-thread-index-id-map (mh-get-table 'mh-thread-index-id-map))
+   (setq mh-thread-scan-line-map (mh-get-table 'mh-thread-scan-line-map))
+   (setq mh-thread-subject-container-hash
+         (mh-get-table 'mh-thread-subject-container-hash))
+   (setq mh-thread-duplicates (mh-get-table 'mh-thread-duplicates))
+   (setq mh-thread-history (mh-get-table 'mh-thread-history))))
 
 (defun mh-thread-process-in-reply-to (reply-to-header)
   "Extract message id's from REPLY-TO-HEADER.