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, 1 insertions, 1 deletions

diff --git a/src/sound.c b/src/sound.c
index f8c6b483056..e84f7415cd3 100644
--- a/src/sound.c
+++ b/src/sound.c
@@ -1332,7 +1332,7 @@ Internal use only, use `play-sound' instead.  */)
     {
       /* Open the sound file.  */
       current_sound->fd = openp (list1 (Vdata_directory),
-				 attrs[SOUND_FILE], Qnil, &file, Qnil);
+				 attrs[SOUND_FILE], Qnil, &file, Qnil, 0);
       if (current_sound->fd < 0)
 	sound_perror ("Could not open sound file");