# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1316729609 -7200
# Node ID 4611f15ea1e851a19a8bdeb64b96606df502649d
# Parent  13505a7899dc8c0b328244c798ed34bf2a45f31a
strerror_r-posix: Avoid a link error on MSVC.

* m4/strerror_r.m4 (gl_PREREQ_STRERROR_R): Check for snprintf.
* lib/strerror_r.c (snprintf): Define to _snprintf if it doesn't exist.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-09-22  Bruno Haible  <bruno@clisp.org>
+
+	strerror_r-posix: Avoid a link error on MSVC.
+	* m4/strerror_r.m4 (gl_PREREQ_STRERROR_R): Check for snprintf.
+	* lib/strerror_r.c (snprintf): Define to _snprintf if it doesn't exist.
+
 2011-09-22  Bruno Haible  <bruno@clisp.org>
 
 	select: Avoid link errors on MSVC.
diff --git a/lib/strerror_r.c b/lib/strerror_r.c
--- a/lib/strerror_r.c
+++ b/lib/strerror_r.c
@@ -86,6 +86,12 @@
 
 #endif
 
+/* On MSVC, there is no snprintf() function, just a _snprintf().
+   It is of lower quality, but sufficient for the simple use here.  */
+#if !HAVE_SNPRINTF
+# define snprintf _snprintf
+#endif
+
 /* Copy as much of MSG into BUF as possible, without corrupting errno.
    Return 0 if MSG fit in BUFLEN, otherwise return ERANGE.  */
 static int
diff --git a/m4/strerror_r.m4 b/m4/strerror_r.m4
--- a/m4/strerror_r.m4
+++ b/m4/strerror_r.m4
@@ -1,4 +1,4 @@
-# strerror_r.m4 serial 13
+# strerror_r.m4 serial 14
 dnl Copyright (C) 2002, 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -43,6 +43,7 @@
   dnl glibc >= 2.3.4 and cygwin 1.7.9 have a function __xpg_strerror_r.
   AC_CHECK_FUNCS_ONCE([__xpg_strerror_r])
   AC_CHECK_FUNCS_ONCE([catgets])
+  AC_CHECK_FUNCS_ONCE([snprintf])
 ])
 
 # Detect if strerror_r works, but without affecting whether a replacement