--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2007-03-08  Bruno Haible  <bruno@clisp.org>
+
+	* modules/vprintf-posix: New file.
+	* lib/vprintf.c: New file.
+	* m4/vprintf-posix.m4: New file.
+	* m4/stdio_h.m4 (gl_STDIO_H_DEFAULTS): Set also GNULIB_VPRINTF_POSIX,
+	REPLACE_VPRINTF.
+	* lib/stdio_.h (vprintf): New declaration.
+	* modules/stdio (Makefile.am): Substitute also GNULIB_VPRINTF_POSIX,
+	REPLACE_VPRINTF.
+
 2007-03-08  Bruno Haible  <bruno@clisp.org>
 
 	* modules/fprintf-posix-tests: New file.

--- a/lib/stdio_.h
+++ b/lib/stdio_.h
@@ -68,6 +68,20 @@
      vfprintf (s, f, a))
 #endif
 
+#if @GNULIB_VPRINTF_POSIX@
+# if @REPLACE_VPRINTF@
+#  define vprintf rpl_vprintf
+extern int vprintf (const char *format, va_list args);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef vprintf
+# define vprintf(f,a) \
+    (GL_LINK_WARNING ("vprintf is not always POSIX compliant - " \
+                      "use gnulib module vprintf-posix for portable " \
+                      "POSIX compliance"), \
+     vprintf (f, a))
+#endif
+
 #if @GNULIB_SNPRINTF@
 # if @REPLACE_SNPRINTF@
 #  define snprintf rpl_snprintf

new file mode 100644
--- /dev/null
+++ b/lib/vprintf.c
@@ -0,0 +1,34 @@
+/* Formatted output to a stream.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <stdarg.h>
+
+/* Print formatted output to standard output.
+   Return string length of formatted string.  On error, return a negative
+   value.  */
+int
+vprintf (const char *format, va_list args)
+{
+  return vfprintf (stdout, format, args);
+}

--- a/m4/stdio_h.m4
+++ b/m4/stdio_h.m4
@@ -25,11 +25,13 @@
   GNULIB_SNPRINTF=0;       AC_SUBST([GNULIB_SNPRINTF])
   GNULIB_SPRINTF_POSIX=0;  AC_SUBST([GNULIB_SPRINTF_POSIX])
   GNULIB_VFPRINTF_POSIX=0; AC_SUBST([GNULIB_VFPRINTF_POSIX])
+  GNULIB_VPRINTF_POSIX=0;  AC_SUBST([GNULIB_VPRINTF_POSIX])
   GNULIB_VSNPRINTF=0;      AC_SUBST([GNULIB_VSNPRINTF])
   GNULIB_VSPRINTF_POSIX=0; AC_SUBST([GNULIB_VSPRINTF_POSIX])
   dnl Assume proper GNU behavior unless another module says otherwise.
   REPLACE_FPRINTF=0;       AC_SUBST([REPLACE_FPRINTF])
   REPLACE_VFPRINTF=0;      AC_SUBST([REPLACE_VFPRINTF])
+  REPLACE_VPRINTF=0;       AC_SUBST([REPLACE_VPRINTF])
   REPLACE_SNPRINTF=0;      AC_SUBST([REPLACE_SNPRINTF])
   HAVE_DECL_SNPRINTF=1;    AC_SUBST([HAVE_DECL_SNPRINTF])
   REPLACE_VSNPRINTF=0;     AC_SUBST([REPLACE_VSNPRINTF])

new file mode 100644
--- /dev/null
+++ b/m4/vprintf-posix.m4
@@ -0,0 +1,23 @@
+# vprintf-posix.m4 serial 1
+dnl Copyright (C) 2007 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_VPRINTF_POSIX],
+[
+  AC_REQUIRE([gl_FUNC_VFPRINTF_POSIX])
+  if test $gl_cv_func_vfprintf_posix = no; then
+    gl_REPLACE_VPRINTF
+  fi
+])
+
+AC_DEFUN([gl_REPLACE_VPRINTF],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+  AC_LIBOBJ([vprintf])
+  REPLACE_VPRINTF=1
+  gl_PREREQ_VPRINTF
+])
+
+AC_DEFUN([gl_PREREQ_VPRINTF], [:])

--- a/modules/stdio
+++ b/modules/stdio
@@ -25,10 +25,12 @@
 	      -e 's|@''GNULIB_SNPRINTF''@|$(GNULIB_SNPRINTF)|g' \
 	      -e 's|@''GNULIB_SPRINTF_POSIX''@|$(GNULIB_SPRINTF_POSIX)|g' \
 	      -e 's|@''GNULIB_VFPRINTF_POSIX''@|$(GNULIB_VFPRINTF_POSIX)|g' \
+	      -e 's|@''GNULIB_VPRINTF_POSIX''@|$(GNULIB_VPRINTF_POSIX)|g' \
 	      -e 's|@''GNULIB_VSNPRINTF''@|$(GNULIB_VSNPRINTF)|g' \
 	      -e 's|@''GNULIB_VSPRINTF_POSIX''@|$(GNULIB_VSPRINTF_POSIX)|g' \
 	      -e 's|@''REPLACE_FPRINTF''@|$(REPLACE_FPRINTF)|g' \
 	      -e 's|@''REPLACE_VFPRINTF''@|$(REPLACE_VFPRINTF)|g' \
+	      -e 's|@''REPLACE_VPRINTF''@|$(REPLACE_VPRINTF)|g' \
 	      -e 's|@''REPLACE_SNPRINTF''@|$(REPLACE_SNPRINTF)|g' \
 	      -e 's|@''HAVE_DECL_SNPRINTF''@|$(HAVE_DECL_SNPRINTF)|g' \
 	      -e 's|@''REPLACE_VSNPRINTF''@|$(REPLACE_VSNPRINTF)|g' \

new file mode 100644
--- /dev/null
+++ b/modules/vprintf-posix
@@ -0,0 +1,27 @@
+Description:
+POSIX compatible vprintf() function: print formatted output to standard output
+
+Files:
+lib/vprintf.c
+m4/vprintf-posix.m4
+m4/printf.m4
+
+Depends-on:
+stdio
+vfprintf-posix
+
+configure.ac:
+gl_FUNC_VPRINTF_POSIX
+gl_STDIO_MODULE_INDICATOR([vprintf-posix])
+
+Makefile.am:
+
+Include:
+<stdio.h>
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
+