New macros NULL_DEVICE and EXEC_SUFFIXES, to give the name of the

	equivalent of /dev/null, and the suffixes used by executable
	files.  This is simple, and helps people porting Emacs to other
	operating systems.
	* process.h (NULL_DEVICE): Give this a default value.
	* process.c (Fstart_process): Pass EXEC_SUFFIXES to openp.
	(Fprocess_send_eof): Use NULL_DEVICE instead of "/dev/null".
	* callproc.c (Fcall_process): Pass EXEC_SUFFIXES to openp.
	Use NULL_DEVICE instead of "/dev/null".
	* s/vms.h (NULL_DEVICE): #define this.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/s/vms.h b/src/s/vms.h
index 01041b3e140..dd4769a10bd 100644
--- a/src/s/vms.h
+++ b/src/s/vms.h
@@ -246,3 +246,5 @@ globalref char sdata[];
 /* Stdio FILE type has extra indirect on VMS, so must alter this macro.  */
 
 #define PENDING_OUTPUT_COUNT(FILE) ((*(FILE))->_ptr - (*(FILE))->_base)
+
+#define NULL_DEVICE "NLA0:"