Definitions for math handling on Arm.

diff --git a/sysdeps/arm/fpu/bits/mathdef.h b/sysdeps/arm/fpu/bits/mathdef.h
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+++ b/sysdeps/arm/fpu/bits/mathdef.h
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+/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#if !defined _MATH_H && !defined _COMPLEX_H
+# error "Never use <bits/mathdef.h> directly; include <math.h> instead"
+#endif
+
+#if defined  __USE_ISOC9X && defined _MATH_H && !defined _MATH_H_MATHDEF
+# define _MATH_H_MATHDEF       1
+
+/* GCC does not promote `float' values to `double'.  */
+typedef float float_t;         /* `float' expressions are evaluated as
+                                  `float'.  */
+typedef double double_t;       /* `double' expressions are evaluated as
+                                  `double'.  */
+
+/* Signal that types stay as they were declared.  */
+# define FLT_EVAL_METHOD       0
+
+/* Define `INFINITY' as value of type `float'.  */
+# define INFINITY      HUGE_VALF
+
+
+/* The values returned by `ilogb' for 0 and NaN respectively.  */
+# define FP_ILOGB0     0x80000001
+# define FP_ILOGBNAN   0x7fffffff
+
+/* Number of decimal digits for the `double' type.  */
+# define DECIMAL_DIG   15
+
+#endif /* ISO C99 */
+
+#ifndef __NO_LONG_DOUBLE_MATH
+/* Signal that we do not really have a `long double'.  This disables the
+   declaration of all the `long double' function variants.  */
+/* XXX The FPA does support this but the patterns in GCC are currently
+   turned off.  */
+# define __NO_LONG_DOUBLE_MATH 1
+#endif