4 files changed, 18 insertions, 16 deletions

diff --git a/lisp/dnd.el b/lisp/dnd.el
index 2b68b025ac1..3fda471497f 100644
--- a/lisp/dnd.el
+++ b/lisp/dnd.el
@@ -122,17 +122,17 @@ Return nil if URI is not a local file."
 
   ;; The hostname may be our hostname, in that case, convert to a local
   ;; file.  Otherwise return nil.  TODO:  How about an IP-address as hostname?
-  (let ((system-name (system-name)))
+  (let ((sysname (system-name)))
     (let ((hostname (when (string-match "^file://\\([^/]*\\)" uri)
                       (downcase (match-string 1 uri))))
-          (system-name-no-dot
-           (downcase (if (string-match "^[^\\.]+" system-name)
-                         (match-string 0 system-name)
-                       system-name))))
+          (sysname-no-dot
+           (downcase (if (string-match "^[^\\.]+" sysname)
+                         (match-string 0 sysname)
+                       sysname))))
       (when (and hostname
                  (or (string-equal "localhost" hostname)
-                     (string-equal (downcase system-name) hostname)
-                     (string-equal system-name-no-dot hostname)))
+                     (string-equal (downcase sysname) hostname)
+                     (string-equal sysname-no-dot hostname)))
         (concat "file://" (substring uri (+ 7 (length hostname))))))))
 
 (defsubst dnd-unescape-uri (uri)
diff --git a/lisp/gnus/message.el b/lisp/gnus/message.el
index d58a2922217..ee5d824a852 100644
--- a/lisp/gnus/message.el
+++ b/lisp/gnus/message.el
@@ -5849,7 +5849,7 @@ give as trustworthy answer as possible."
 
 (defun message-make-fqdn ()
   "Return user's fully qualified domain name."
-  (let* ((system-name (system-name))
+  (let* ((sysname (system-name))
          (user-mail (message-user-mail-address))
          (user-domain
           (if (and user-mail
@@ -5863,10 +5863,10 @@ give as trustworthy answer as possible."
            (not (string-match message-bogus-system-names message-user-fqdn)))
       ;; `message-user-fqdn' seems to be valid
       message-user-fqdn)
-     ((and (string-match message-valid-fqdn-regexp system-name)
-           (not (string-match message-bogus-system-names system-name)))
+     ((and (string-match message-valid-fqdn-regexp sysname)
+           (not (string-match message-bogus-system-names sysname)))
       ;; `system-name' returned the right result.
-      system-name)
+      sysname)
      ;; Try `mail-host-address'.
      ((and (boundp 'mail-host-address)
            (stringp mail-host-address)
@@ -5881,7 +5881,7 @@ give as trustworthy answer as possible."
       user-domain)
      ;; Default to this bogus thing.
      (t
-      (concat system-name
+      (concat sysname
               ".i-did-not-set--mail-host-address--so-tickle-me")))))
 
 (defun message-make-domain ()
diff --git a/lisp/gnus/nnvirtual.el b/lisp/gnus/nnvirtual.el
index d13b492ddb3..61bf5560e2e 100644
--- a/lisp/gnus/nnvirtual.el
+++ b/lisp/gnus/nnvirtual.el
@@ -99,7 +99,7 @@ component group will show up when you enter the virtual group.")
         (let ((vbuf (nnheader-set-temp-buffer
                      (get-buffer-create " *virtual headers*")))
               (carticles (nnvirtual-partition-sequence articles))
-              (system-name (system-name))
+              (sysname (system-name))
               cgroup carticle article result prefix)
           (while carticles
             (setq cgroup (caar carticles))
@@ -151,7 +151,7 @@ component group will show up when you enter the virtual group.")
                   ;; and clean up the xrefs.
                   (princ article nntp-server-buffer)
                   (nnvirtual-update-xref-header cgroup carticle
-                                                prefix (system-name))
+                                                prefix sysname)
                   (forward-line 1))
                 )
 
@@ -378,7 +378,7 @@ component group will show up when you enter the virtual group.")
       (mapc 'nnheader-insert-nov headers))))
 
 
-(defun nnvirtual-update-xref-header (group article prefix system-name)
+(defun nnvirtual-update-xref-header (group article prefix sysname)
   "Edit current NOV header in current buffer to have an xref to the component group, and also server prefix any existing xref lines."
   ;; Move to beginning of Xref field, creating a slot if needed.
   (beginning-of-line)
@@ -393,7 +393,7 @@ component group will show up when you enter the virtual group.")
     (forward-char -1)
     (delete-char 1))
 
-  (insert "Xref: " (system-name) " " group ":")
+  (insert "Xref: " sysname " " group ":")
   (princ article (current-buffer))
   (insert " ")
 
diff --git a/lisp/startup.el b/lisp/startup.el
index 8e981bbc64a..0c5e66a2e6e 100644
--- a/lisp/startup.el
+++ b/lisp/startup.el
@@ -358,6 +358,8 @@ this variable usefully is to set it while building and dumping Emacs."
   :set (lambda (_variable _value)
           (error "Customizing `site-run-file' does not work")))
 
+(make-obsolete-variable 'system-name "use (system-name) instead" "25.1")
+
 (defcustom mail-host-address nil
   "Name of this machine, for purposes of naming users.
 If non-nil, Emacs uses this instead of `system-name' when constructing