2 files changed, 72 insertions, 0 deletions
diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/lib/copysignl.c b/gnulib/lib/copysignl.c
new file mode 100644
index 0000000..4432577
--- /dev/null
+++ b/gnulib/lib/copysignl.c
@@ -0,0 +1,72 @@
+/* Copy sign into another 'long double' number.
+   Copyright (C) 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>
+
+/* Specification.  */
+#include <math.h>
+
+#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+
+long double
+copysignl (long double x, long double y)
+{
+  return copysign (x, y);
+}
+
+#else
+
+# if defined __hpux && !defined __GNUC__
+
+#  include <float.h>
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L.  */
+static long double
+compute_minus_zerol (void)
+{
+  return -LDBL_MIN * LDBL_MIN;
+}
+#  define minus_zerol compute_minus_zerol ()
+
+/* HP cc on HP-UX 11 has a bug: When x is a positive zero, - x comes out
+   as a positive zero, rather than as a minus zero.  Work around it.  */
+static long double
+unary_minus (long double x)
+{
+  if (x == 0.0L)
+    {
+      if (signbit (x))
+        return 0.0L;
+      else
+        return minus_zerol;
+    }
+  else
+    return - x;
+}
+
+# endif
+
+long double
+copysignl (long double x, long double y)
+{
+# if defined __hpux && !defined __GNUC__
+  return (signbit (x) != signbit (y) ? unary_minus (x) : x);
+# else
+  return (signbit (x) != signbit (y) ? - x : x);
+# endif
+}
+
+#endif