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diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 4fc10daa05477586fea99b6b3ca02a87d1102fa
diff --git a/gnulib/tests/test-trunc1.c b/gnulib/tests/test-trunc1.c
new file mode 100644
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--- /dev/null
+++ b/gnulib/tests/test-trunc1.c
@@ -0,0 +1,67 @@
+/* Test of rounding towards zero.
+   Copyright (C) 2007-2010 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>, 2007.  */
+
+#include <config.h>
+
+#include <math.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (trunc, double, (double));
+
+#include "isnand-nolibm.h"
+#include "nan.h"
+#include "macros.h"
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+   So we use -zero instead.  */
+double zero = 0.0;
+
+int
+main ()
+{
+  /* Zero.  */
+  ASSERT (trunc (0.0) == 0.0);
+  ASSERT (trunc (-zero) == 0.0);
+  /* Positive numbers.  */
+  ASSERT (trunc (0.3) == 0.0);
+  ASSERT (trunc (0.7) == 0.0);
+  ASSERT (trunc (1.0) == 1.0);
+  ASSERT (trunc (1.5) == 1.0);
+  ASSERT (trunc (1.999) == 1.0);
+  ASSERT (trunc (2.0) == 2.0);
+  ASSERT (trunc (65535.999) == 65535.0);
+  ASSERT (trunc (65536.0) == 65536.0);
+  ASSERT (trunc (2.341e31) == 2.341e31);
+  /* Negative numbers.  */
+  ASSERT (trunc (-0.3) == 0.0);
+  ASSERT (trunc (-0.7) == 0.0);
+  ASSERT (trunc (-1.0) == -1.0);
+  ASSERT (trunc (-1.5) == -1.0);
+  ASSERT (trunc (-1.999) == -1.0);
+  ASSERT (trunc (-2.0) == -2.0);
+  ASSERT (trunc (-65535.999) == -65535.0);
+  ASSERT (trunc (-65536.0) == -65536.0);
+  ASSERT (trunc (-2.341e31) == -2.341e31);
+  /* Infinite numbers.  */
+  ASSERT (trunc (1.0 / 0.0) == 1.0 / 0.0);
+  ASSERT (trunc (-1.0 / 0.0) == -1.0 / 0.0);
+  /* NaNs.  */
+  ASSERT (isnand (trunc (NaNd ())));
+
+  return 0;
+}