Minor declare-function improvement

* lisp/emacs-lisp/bytecomp.el
(byte-compile-macroexpand-declare-function):
Handle declarations after calls.  (Bug#20509)

1 files changed, 11 insertions, 5 deletions

diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index f0d2ee48ed2..67744c69b14 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -2920,11 +2920,17 @@ for symbols generated by the byte compiler itself."
 
 ;; Special macro-expander used during byte-compilation.
 (defun byte-compile-macroexpand-declare-function (fn file &rest args)
-  (push (cons fn
-              (if (and (consp args) (listp (car args)))
-                  (list 'declared (car args))
-                t))                     ; Arglist not specified.
-        byte-compile-function-environment)
+  (let ((gotargs (and (consp args) (listp (car args))))
+	(unresolved (assq fn byte-compile-unresolved-functions)))
+    (when unresolved	      ; function was called before declaration
+      (if (and gotargs (byte-compile-warning-enabled-p 'callargs))
+	  (byte-compile-arglist-warn fn (car args) nil)
+	(setq byte-compile-unresolved-functions
+	      (delq unresolved byte-compile-unresolved-functions))))
+    (push (cons fn (if gotargs
+		       (list 'declared (car args))
+		     t))                     ; Arglist not specified.
+	  byte-compile-function-environment))
   ;; We are stating that it _will_ be defined at runtime.
   (setq byte-compile-noruntime-functions
         (delq fn byte-compile-noruntime-functions))