new file mode 100644
--- /dev/null
+++ b/tests/test-dprintf-posix.c
@@ -0,0 +1,179 @@
+/* Test of POSIX compatible dprintf() function.
+   Copyright (C) 2007-2009 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ASSERT(expr) \
+  do									     \
+    {									     \
+      if (!(expr))							     \
+        {								     \
+          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          fflush (stderr);						     \
+          abort ();							     \
+        }								     \
+    }									     \
+  while (0)
+
+static void
+test_function (int (*my_dprintf) (int, const char *, ...))
+{
+  /* Here we don't test output that may be platform dependent.
+     The bulk of the tests is done as part of the 'vasnprintf-posix' module.  */
+
+  /* Test support of size specifiers as in C99.  */
+
+  my_dprintf (fileno (stdout), "%ju %d\n", (uintmax_t) 12345671, 33, 44, 55);
+
+  my_dprintf (fileno (stdout), "%zu %d\n", (size_t) 12345672, 33, 44, 55);
+
+  my_dprintf (fileno (stdout), "%tu %d\n", (ptrdiff_t) 12345673, 33, 44, 55);
+
+  /* Test the support of the 'a' and 'A' conversion specifier for hexadecimal
+     output of floating-point numbers.  */
+
+  /* Positive zero.  */
+  my_dprintf (fileno (stdout), "%a %d\n", 0.0, 33, 44, 55);
+
+  /* Positive infinity.  */
+  my_dprintf (fileno (stdout), "%a %d\n", 1.0 / 0.0, 33, 44, 55);
+
+  /* Negative infinity.  */
+  my_dprintf (fileno (stdout), "%a %d\n", -1.0 / 0.0, 33, 44, 55);
+
+  /* FLAG_ZERO with infinite number.  */
+  my_dprintf (fileno (stdout), "%010a %d\n", 1.0 / 0.0, 33, 44, 55);
+
+  /* Test the support of the %f format directive.  */
+
+  /* A positive number.  */
+  my_dprintf (fileno (stdout), "%f %d\n", 12.75, 33, 44, 55);
+
+  /* A larger positive number.  */
+  my_dprintf (fileno (stdout), "%f %d\n", 1234567.0, 33, 44, 55);
+
+  /* A negative number.  */
+  my_dprintf (fileno (stdout), "%f %d\n", -0.03125, 33, 44, 55);
+
+  /* Positive zero.  */
+  my_dprintf (fileno (stdout), "%f %d\n", 0.0, 33, 44, 55);
+
+  /* FLAG_ZERO.  */
+  my_dprintf (fileno (stdout), "%015f %d\n", 1234.0, 33, 44, 55);
+
+  /* Precision.  */
+  my_dprintf (fileno (stdout), "%.f %d\n", 1234.0, 33, 44, 55);
+
+  /* Precision with no rounding.  */
+  my_dprintf (fileno (stdout), "%.2f %d\n", 999.95, 33, 44, 55);
+
+  /* Precision with rounding.  */
+  my_dprintf (fileno (stdout), "%.2f %d\n", 999.996, 33, 44, 55);
+
+  /* A positive number.  */
+  my_dprintf (fileno (stdout), "%Lf %d\n", 12.75L, 33, 44, 55);
+
+  /* A larger positive number.  */
+  my_dprintf (fileno (stdout), "%Lf %d\n", 1234567.0L, 33, 44, 55);
+
+  /* A negative number.  */
+  my_dprintf (fileno (stdout), "%Lf %d\n", -0.03125L, 33, 44, 55);
+
+  /* Positive zero.  */
+  my_dprintf (fileno (stdout), "%Lf %d\n", 0.0L, 33, 44, 55);
+
+  /* FLAG_ZERO.  */
+  my_dprintf (fileno (stdout), "%015Lf %d\n", 1234.0L, 33, 44, 55);
+
+  /* Precision.  */
+  my_dprintf (fileno (stdout), "%.Lf %d\n", 1234.0L, 33, 44, 55);
+
+  /* Precision with no rounding.  */
+  my_dprintf (fileno (stdout), "%.2Lf %d\n", 999.95L, 33, 44, 55);
+
+  /* Precision with rounding.  */
+  my_dprintf (fileno (stdout), "%.2Lf %d\n", 999.996L, 33, 44, 55);
+
+  /* Test the support of the %F format directive.  */
+
+  /* A positive number.  */
+  my_dprintf (fileno (stdout), "%F %d\n", 12.75, 33, 44, 55);
+
+  /* A larger positive number.  */
+  my_dprintf (fileno (stdout), "%F %d\n", 1234567.0, 33, 44, 55);
+
+  /* A negative number.  */
+  my_dprintf (fileno (stdout), "%F %d\n", -0.03125, 33, 44, 55);
+
+  /* Positive zero.  */
+  my_dprintf (fileno (stdout), "%F %d\n", 0.0, 33, 44, 55);
+
+  /* FLAG_ZERO.  */
+  my_dprintf (fileno (stdout), "%015F %d\n", 1234.0, 33, 44, 55);
+
+  /* Precision.  */
+  my_dprintf (fileno (stdout), "%.F %d\n", 1234.0, 33, 44, 55);
+
+  /* Precision with no rounding.  */
+  my_dprintf (fileno (stdout), "%.2F %d\n", 999.95, 33, 44, 55);
+
+  /* Precision with rounding.  */
+  my_dprintf (fileno (stdout), "%.2F %d\n", 999.996, 33, 44, 55);
+
+  /* A positive number.  */
+  my_dprintf (fileno (stdout), "%LF %d\n", 12.75L, 33, 44, 55);
+
+  /* A larger positive number.  */
+  my_dprintf (fileno (stdout), "%LF %d\n", 1234567.0L, 33, 44, 55);
+
+  /* A negative number.  */
+  my_dprintf (fileno (stdout), "%LF %d\n", -0.03125L, 33, 44, 55);
+
+  /* Positive zero.  */
+  my_dprintf (fileno (stdout), "%LF %d\n", 0.0L, 33, 44, 55);
+
+  /* FLAG_ZERO.  */
+  my_dprintf (fileno (stdout), "%015LF %d\n", 1234.0L, 33, 44, 55);
+
+  /* Precision.  */
+  my_dprintf (fileno (stdout), "%.LF %d\n", 1234.0L, 33, 44, 55);
+
+  /* Precision with no rounding.  */
+  my_dprintf (fileno (stdout), "%.2LF %d\n", 999.95L, 33, 44, 55);
+
+  /* Precision with rounding.  */
+  my_dprintf (fileno (stdout), "%.2LF %d\n", 999.996L, 33, 44, 55);
+
+  /* Test the support of the POSIX/XSI format strings with positions.  */
+
+  my_dprintf (fileno (stdout), "%2$d %1$d\n", 33, 55);
+}
+
+int
+main (int argc, char *argv[])
+{
+  test_function (dprintf);
+  return 0;
+}