Document `load-prefer-newer'.

* doc/emacs/building.texi (Lisp Libraries): Document
  `load-prefer-newer'.

It is already documented in lispref.

3 files changed, 12 insertions, 6 deletions

diff --git a/doc/emacs/ChangeLog b/doc/emacs/ChangeLog
index 3b81e731640..7f0ca7184e2 100644
--- a/doc/emacs/ChangeLog
+++ b/doc/emacs/ChangeLog
@@ -1,5 +1,7 @@
 2014-01-09  Rüdiger Sonderfeld  <ruediger@c-plusplus.de>
 
+	* building.texi (Lisp Libraries): Document `load-prefer-newer'.
+
 	* files.texi (File Conveniences): Document `image-next-frame',
 	`image-previous-frame', `image-goto-frame',
 	`image-increase-speed', `image-decrease-speed',
diff --git a/doc/emacs/building.texi b/doc/emacs/building.texi
index fdb38bfd4d1..1df4dcdf833 100644
--- a/doc/emacs/building.texi
+++ b/doc/emacs/building.texi
@@ -1348,6 +1348,7 @@ not from an existing Emacs buffer.
 
 @findex load
 @findex load-library
+@vindex load-prefer-newer
 @cindex load path for Emacs Lisp
   If an Emacs Lisp file is installed in the Emacs Lisp @dfn{load path}
 (defined below), you can load it by typing @kbd{M-x load-library},
@@ -1356,15 +1357,17 @@ command prompts for a @dfn{library name} rather than a file name; it
 searches through each directory in the Emacs Lisp load path, trying to
 find a file matching that library name.  If the library name is
 @samp{@var{foo}}, it tries looking for files named
-@file{@var{foo}.elc}, @file{@var{foo}.el}, and lastly just
-@file{@var{foo}}; the first one found is loaded.  This command prefers
-@file{.elc} files over @file{.el} files because compiled files load
-and run faster.  If it finds that @file{@var{lib}.el} is newer than
-@file{@var{lib}.elc}, it issues a warning, in case someone made
+@file{@var{foo}.elc}, @file{@var{foo}.el}, and @file{@var{foo}}.  The
+default behaviour is to load the first file found.  This command
+prefers @file{.elc} files over @file{.el} files because compiled files
+load and run faster.  If it finds that @file{@var{lib}.el} is newer
+than @file{@var{lib}.elc}, it issues a warning, in case someone made
 changes to the @file{.el} file and forgot to recompile it, but loads
 the @file{.elc} file anyway.  (Due to this behavior, you can save
 unfinished edits to Emacs Lisp source files, and not recompile until
-your changes are ready for use.)
+your changes are ready for use.)  However setting
+@code{load-prefer-newer} to a non-@code{nil} value will Emacs load the
+newest version of the file found.
 
   Emacs Lisp programs usually load Emacs Lisp files using the
 @code{load} function.  This is similar to @code{load-library}, but is
diff --git a/etc/NEWS b/etc/NEWS
index 7677991b902..4463d690079 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -242,6 +242,7 @@ etc.  You can customize this to specify a function that provides a
 default value from the regexp last history element, or from the symbol
 found at point.
 
++++
 *** `load-prefer-newer', affects how the `load' function chooses the
 file to load.  If this is non-nil, then when both .el and .elc
 versions of a file exist, and the caller did not explicitly specify