>From 69acbf9b8d4b8517eefa25be74e436f22b9b0428 Mon Sep 17 00:00:00 2001
From: Bruno Haible <address@hidden>
Date: Sun, 23 Feb 2020 12:13:40 +0100
Subject: [PATCH 04/29] c-vsnprintf: Use 'restrict'.

* lib/c-vsnprintf.h (c_vsnprintf): Use 'restrict'.
* modules/c-vsnprintf (configure.ac): Require AC_C_RESTRICT.
---
 ChangeLog           | 4 ++++
 lib/c-vsnprintf.h   | 3 ++-
 modules/c-vsnprintf | 1 +
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 277b594..1bc838e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2020-02-23  Bruno Haible  <address@hidden>
 
+	c-vsnprintf: Use 'restrict'.
+	* lib/c-vsnprintf.h (c_vsnprintf): Use 'restrict'.
+	* modules/c-vsnprintf (configure.ac): Require AC_C_RESTRICT.
+
 	c-snprintf: Use 'restrict'.
 	* lib/c-snprintf.h (c_snprintf): Use 'restrict'.
 	* modules/c-snprintf (configure.ac): Require AC_C_RESTRICT.
diff --git a/lib/c-vsnprintf.h b/lib/c-vsnprintf.h
index 97a2816..e296871 100644
--- a/lib/c-vsnprintf.h
+++ b/lib/c-vsnprintf.h
@@ -39,7 +39,8 @@
 extern "C" {
 #endif
 
-int c_vsnprintf (char *str, size_t size, const char *format, va_list args)
+extern int c_vsnprintf (char *restrict str, size_t size,
+                        const char *format, va_list args)
        _GL_ATTRIBUTE_FORMAT ((__printf__, 3, 0));
 
 #ifdef __cplusplus
diff --git a/modules/c-vsnprintf b/modules/c-vsnprintf
index 7846d9d..b227e92 100644
--- a/modules/c-vsnprintf
+++ b/modules/c-vsnprintf
@@ -10,6 +10,7 @@ Depends-on:
 c-vasnprintf
 
 configure.ac:
+AC_REQUIRE([AC_C_RESTRICT])
 
 Makefile.am:
 lib_SOURCES += c-vsnprintf.c
-- 
2.7.4