Add load-prefer-newer option, to load .el if newer than .elc

* src/lread.c (Fload): Pass load_prefer_newer to openp.
Don't bother checking mtime if openp already did it.
(openp): Add `newer' argument, to check all suffixes
and find the newest file.
(syms_of_lread) <load_prefer_newer>: New option. 

* src/callproc.c (call_process):
* src/charset.c (load_charset_map_from_file):
* src/emacs.c (init_cmdargs):
* src/image.c (x_create_bitmap_from_file, x_find_image_file):
* src/lisp.h (openp):
* lread.c (Flocate_file_internal):
* src/process.c (Fformat_network_address):
* src/sound.c (Fplay_sound_internal):
* src/w32.c (check_windows_init_file):
* src/w32proc.c (sys_spawnve): Update for new arg spec of openp.

* lisp/Makefile.in (BYTE_COMPILE_FLAGS): Set load-prefer-newer to t.

* etc/NEWS: Mention this.

Fixes: debbugs:2061

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 5933f145b48..937b5c7c4c4 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,21 @@
 2013-12-18  Glenn Morris  <rgm@gnu.org>
 
+        * lread.c (Fload): Pass load_prefer_newer to openp.
+        Don't bother checking mtime if openp already did it.
+        (openp): Add `newer' argument, to check all suffixes
+        and find the newest file.
+        (syms_of_lread) <load_prefer_newer>: New option.  (Bug#2061)
+        * callproc.c (call_process):
+        * charset.c (load_charset_map_from_file):
+        * emacs.c (init_cmdargs):
+        * image.c (x_create_bitmap_from_file, x_find_image_file):
+        * lisp.h (openp):
+        * lread.c (Flocate_file_internal):
+        * process.c (Fformat_network_address):
+        * sound.c (Fplay_sound_internal):
+        * w32.c (check_windows_init_file):
+        * w32proc.c (sys_spawnve): Update for new arg spec of openp.
+
         * emacs.c (standard_args) [HAVE_NS]: Remove -disable-font-backend.
 
 2013-12-17  Eli Zaretskii  <eliz@gnu.org>