* lisp/progmodes/cc-mode.el (c-common-init): Bind case-fold-search to nil

Backport:  This fixes bug #53605.

diff --git a/lisp/progmodes/cc-mode.el b/lisp/progmodes/cc-mode.el
index 0aef94a4f2d0cb0490a365d62bbaa1a68e72b881..22ab277781abf5726b48ac7ab9e81e050d76760a 100644 (file)
--- a/lisp/progmodes/cc-mode.el
+++ b/lisp/progmodes/cc-mode.el
@@ -787,43 +787,44 @@ MODE is the symbol for the mode to initialize, like `c-mode'.  See
 `c-basic-common-init' for details.  It's only optional to be
 compatible with old code; callers should always specify it."
 
-  (unless mode
-    ;; Called from an old third party package.  The fallback is to
-    ;; initialize for C.
-    (c-init-language-vars-for 'c-mode))
-
-  (c-basic-common-init mode c-default-style)
-  (when mode
-    ;; Only initialize font locking if we aren't called from an old package.
-    (c-font-lock-init))
-
-  ;; Starting a mode is a sort of "change".  So call the change functions...
-  (save-restriction
-    (widen)
-    (setq c-new-BEG (point-min))
-    (setq c-new-END (point-max))
-    (save-excursion
-      (let (before-change-functions after-change-functions)
-       (mapc (lambda (fn)
-               (funcall fn (point-min) (point-max)))
-             c-get-state-before-change-functions)
-       (mapc (lambda (fn)
-               (funcall fn (point-min) (point-max)
-                        (- (point-max) (point-min))))
-             c-before-font-lock-functions))))
-
-  (set (make-local-variable 'outline-regexp) "[^#\n\^M]")
-  (set (make-local-variable 'outline-level) 'c-outline-level)
-  (set (make-local-variable 'add-log-current-defun-function)
-       (lambda ()
-        (or (c-cpp-define-name) (car (c-defun-name-and-limits nil)))))
-  (let ((rfn (assq mode c-require-final-newline)))
-    (when rfn
-      (if (boundp 'mode-require-final-newline)
-          (and (cdr rfn)
-               (set (make-local-variable 'require-final-newline)
-                    mode-require-final-newline))
-        (set (make-local-variable 'require-final-newline) (cdr rfn))))))
+  (let (case-fold-search)
+    (unless mode
+      ;; Called from an old third party package.  The fallback is to
+      ;; initialize for C.
+      (c-init-language-vars-for 'c-mode))
+
+    (c-basic-common-init mode c-default-style)
+    (when mode
+      ;; Only initialize font locking if we aren't called from an old package.
+      (c-font-lock-init))
+
+    ;; Starting a mode is a sort of "change".  So call the change functions...
+    (save-restriction
+      (widen)
+      (setq c-new-BEG (point-min))
+      (setq c-new-END (point-max))
+      (save-excursion
+       (let (before-change-functions after-change-functions)
+         (mapc (lambda (fn)
+                 (funcall fn (point-min) (point-max)))
+               c-get-state-before-change-functions)
+         (mapc (lambda (fn)
+                 (funcall fn (point-min) (point-max)
+                          (- (point-max) (point-min))))
+               c-before-font-lock-functions))))
+
+    (set (make-local-variable 'outline-regexp) "[^#\n\^M]")
+    (set (make-local-variable 'outline-level) 'c-outline-level)
+    (set (make-local-variable 'add-log-current-defun-function)
+        (lambda ()
+          (or (c-cpp-define-name) (car (c-defun-name-and-limits nil)))))
+    (let ((rfn (assq mode c-require-final-newline)))
+      (when rfn
+       (if (boundp 'mode-require-final-newline)
+            (and (cdr rfn)
+                (set (make-local-variable 'require-final-newline)
+                      mode-require-final-newline))
+          (set (make-local-variable 'require-final-newline) (cdr rfn)))))))
 
 (defun c-count-cfss (lv-alist)
   ;; LV-ALIST is an alist like `file-local-variables-alist'.  Count how many