From fd93d2e60ea66fc3796904ff53ead3ef4755b137 Mon Sep 17 00:00:00 2001
From: Jeff King <peff@peff.net>
Date: Wed, 18 Apr 2012 14:08:49 -0700
Subject: argv-array: refactor empty_argv initialization

An empty argv-array is initialized to point to a static
empty NULL-terminated array.  The original implementation
separates the actual storage of the NULL-terminator from the
pointer to the list.  This makes the exposed type a "const
char **", which nicely matches the type stored by the
argv-array.

However, this indirection means that one cannot use
empty_argv to initialize a static variable, since it is
not a constant.

Instead, we can expose empty_argv directly, as an array of
pointers. The only place we use it is in the ARGV_ARRAY_INIT
initializer, and it decays to a pointer appropriately there.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/argv-array.c b/argv-array.c
index a4e0420..110a61b 100644
--- a/argv-array.c
+++ b/argv-array.c
@@ -2,8 +2,7 @@
 #include "argv-array.h"
 #include "strbuf.h"
 
-static const char *empty_argv_storage = NULL;
-const char **empty_argv = &empty_argv_storage;
+const char *empty_argv[] = { NULL };
 
 void argv_array_init(struct argv_array *array)
 {
diff --git a/argv-array.h b/argv-array.h
index 74dd2b1..c45c698 100644
--- a/argv-array.h
+++ b/argv-array.h
@@ -1,7 +1,7 @@
 #ifndef ARGV_ARRAY_H
 #define ARGV_ARRAY_H
 
-extern const char **empty_argv;
+extern const char *empty_argv[];
 
 struct argv_array {
 	const char **argv;
-- 
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