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Source file not shown in help next to symbol

From: Ivan Kanis
Subject: Source file not shown in help next to symbol
Date: Tue, 14 Jul 2015 17:12:04 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)


I have noticed this problem 2 years ago. When I C-h f on one of my
compiled function I do not get a link to the source code anymore.

My emacs compiled file are not on the same directory as my source file.
I do this so that I can run different version of emacs.

find-lisp-object-file-name is now returning nil. In the function the
variable file-name is correct.

The last condition is looking in the compiled file for the source file.
I haven't seen anything in the byte compiler that generates the string
";;; from file" that it uses to indicate the source. It seems like dead
code to me.

I just removed the last bit so that it works for me.

Let me know if you want me to commit this to master.


diff --git a/lisp/help-fns.el b/lisp/help-fns.el
index 1c7a68a..c1bcab6 100644
--- a/lisp/help-fns.el
+++ b/lisp/help-fns.el
@@ -275,19 +275,7 @@ suitable file is found, return nil."
             ;; The next three forms are from `find-source-lisp-file'.
-            (elc-file (locate-file
-                       (concat file-name
-                               (if (string-match "\\.el\\'" file-name)
-                                   "c"
-                                 ".elc"))
-                       load-path nil 'readable))
-            (str (when elc-file
-                   (with-temp-buffer
-                     (insert-file-contents-literally elc-file nil 0 256)
-                     (buffer-string))))
-            (src-file (and str
-                           (string-match ";;; from file \\(.*\\.el\\)" str)
-                           (match-string 1 str))))
+            (src-file (locate-library file-name load-path nil 'readable)))
        (and src-file (file-readable-p src-file) src-file))))))
 (defun help-fns--key-bindings (function)

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