Honor SOURCE_DATE_EPOCH variable to avoid non-determinism in generated
"autoloads" files.

--- a/lisp/emacs-lisp/autoload.el
+++ b/lisp/emacs-lisp/autoload.el
@@ -378,8 +378,12 @@
   "Insert the section-header line,
 which lists the file name and which functions are in it, etc."
   (insert generate-autoload-section-header)
-  (prin1 `(autoloads ,autoloads ,load-name ,file ,time)
-	 outbuf)
+  (let* ((env  (getenv "SOURCE_DATE_EPOCH"))
+         (time (if env
+                   (seconds-to-time (string-to-number env))
+                 time)))
+    (prin1 `(autoloads ,autoloads ,load-name ,file ,time)
+           outbuf))
   (terpri outbuf)
   ;; Break that line at spaces, to avoid very long lines.
   ;; Make each sub-line into a comment.
cted'>koszko</option>
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<div class='path'>path: <a href='/guix/log/?id=7e309e8a8d7882516b1d7f4815daf52f296bd46f'>root</a>/<a href='/guix/log/gnu?id=7e309e8a8d7882516b1d7f4815daf52f296bd46f'>gnu</a>/<a href='/guix/log/gnu/artwork.scm?id=7e309e8a8d7882516b1d7f4815daf52f296bd46f'>artwork.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/artwork.scm?id=7e309e8a8d7882516b1d7f4815daf52f296bd46f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-11-05 00:08:47 +0100'>2018-11-05</span></td><td><a href='/guix/commit/gnu/artwork.scm?id=688d1a01e45eb1277a6337987bfd53f3fe3caaec'>artwork: Clone over HTTPS.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-06-07 15:58:16 -0400'>2017-06-07</span></td><td><a href='/guix/commit/gnu/artwork.scm?id=94db92f78ec9c849f9c8da05d4d35356909f9fbe'>artwork: Use a descriptive name for the source directory.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>