byte-compile-warning-prefix tweak

* lisp/emacs-lisp/bytecomp.el (byte-compile-warning-prefix): If not
compiling a file, try using load-file-name.

2 files changed, 9 insertions, 0 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 89cc2106ba0..41dc46021f6 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2012-09-13  Glenn Morris  <rgm@gnu.org>
+
+        * emacs-lisp/bytecomp.el (byte-compile-warning-prefix):
+        If not compiling a file, try using load-file-name.
+
 2012-09-13  Stefan Monnier  <monnier@iro.umontreal.ca>
 
         * emacs-lisp/edebug.el (edebug-outside-unread-command-events):
diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index 10bc37c6dcd..c42ae21aae5 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -1016,6 +1016,10 @@ Each function's symbol gets added to `byte-compile-noruntime-functions'."
                      ((bufferp byte-compile-current-file)
                       (format "Buffer %s:"
                               (buffer-name byte-compile-current-file)))
+                     ;; We might be simply loading a file that
+                     ;; contains explicit calls to byte-compile functions.
+                     ((stringp load-file-name)
+                      (format "%s:" (file-relative-name load-file-name dir)))
                      (t "")))
          (pos (if (and byte-compile-current-file
                        (integerp byte-compile-read-position))