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diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/tests/test-ceil-ieee.c b/gnulib/tests/test-ceil-ieee.c
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+++ b/gnulib/tests/test-ceil-ieee.c
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+/* Test of rounding towards positive infinity.
+   Copyright (C) 2010-2011 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/>.  */
+
+#include <config.h>
+
+#include <math.h>
+
+#include "minus-zero.h"
+#include "macros.h"
+
+int
+main ()
+{
+  /* See IEEE 754, section 6.3:
+       "the sign of the result of the round floating-point number to
+        integral value operation is the sign of the operand. These rules
+        shall apply even when operands or results are zero or infinite."  */
+
+  /* Zero.  */
+  ASSERT (!signbit (ceil (0.0)));
+  ASSERT (!!signbit (ceil (minus_zerod)) == !!signbit (minus_zerod));
+  /* Positive numbers.  */
+  ASSERT (!signbit (ceil (0.3)));
+  ASSERT (!signbit (ceil (0.7)));
+  /* Negative numbers.  */
+  ASSERT (!!signbit (ceil (-0.3)) == !!signbit (minus_zerod));
+  ASSERT (!!signbit (ceil (-0.7)) == !!signbit (minus_zerod));
+
+  return 0;
+}