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diff --git a/i686-linux-gnu-4.7/usr/include/x86_64-linux-gnu/bits/cmathcalls.h b/i686-linux-gnu-4.7/usr/include/x86_64-linux-gnu/bits/cmathcalls.h
new file mode 100644
index 0000000..e22b804
--- /dev/null
+++ b/i686-linux-gnu-4.7/usr/include/x86_64-linux-gnu/bits/cmathcalls.h
@@ -0,0 +1,130 @@
+/* Prototype declarations for complex math functions;
+   helper file for <complex.h>.
+   Copyright (C) 1997-2018 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* NOTE: Because of the special way this file is used by <complex.h>, this
+   file must NOT be protected from multiple inclusion as header files
+   usually are.
+
+   This file provides prototype declarations for the math functions.
+   Most functions are declared using the macro:
+
+   __MATHCALL (NAME, (ARGS...));
+
+   This means there is a function `NAME' returning `double' and a function
+   `NAMEf' returning `float'.  Each place `_Mdouble_' appears in the
+   prototype, that is actually `double' in the prototype for `NAME' and
+   `float' in the prototype for `NAMEf'.  Reentrant variant functions are
+   called `NAME_r' and `NAMEf_r'.
+
+   Functions returning other types like `int' are declared using the macro:
+
+   __MATHDECL (TYPE, NAME, (ARGS...));
+
+   This is just like __MATHCALL but for a function returning `TYPE'
+   instead of `_Mdouble_'.  In all of these cases, there is still
+   both a `NAME' and a `NAMEf' that takes `float' arguments.  */
+
+#ifndef _COMPLEX_H
+#error "Never use <bits/cmathcalls.h> directly; include <complex.h> instead."
+#endif
+
+#ifndef _Mdouble_complex_
+# define _Mdouble_complex_ _Mdouble_ _Complex
+#endif
+
+
+/* Trigonometric functions.  */
+
+/* Arc cosine of Z.  */
+__MATHCALL (cacos, (_Mdouble_complex_ __z));
+/* Arc sine of Z.  */
+__MATHCALL (casin, (_Mdouble_complex_ __z));
+/* Arc tangent of Z.  */
+__MATHCALL (catan, (_Mdouble_complex_ __z));
+
+/* Cosine of Z.  */
+__MATHCALL (ccos, (_Mdouble_complex_ __z));
+/* Sine of Z.  */
+__MATHCALL (csin, (_Mdouble_complex_ __z));
+/* Tangent of Z.  */
+__MATHCALL (ctan, (_Mdouble_complex_ __z));
+
+
+/* Hyperbolic functions.  */
+
+/* Hyperbolic arc cosine of Z.  */
+__MATHCALL (cacosh, (_Mdouble_complex_ __z));
+/* Hyperbolic arc sine of Z.  */
+__MATHCALL (casinh, (_Mdouble_complex_ __z));
+/* Hyperbolic arc tangent of Z.  */
+__MATHCALL (catanh, (_Mdouble_complex_ __z));
+
+/* Hyperbolic cosine of Z.  */
+__MATHCALL (ccosh, (_Mdouble_complex_ __z));
+/* Hyperbolic sine of Z.  */
+__MATHCALL (csinh, (_Mdouble_complex_ __z));
+/* Hyperbolic tangent of Z.  */
+__MATHCALL (ctanh, (_Mdouble_complex_ __z));
+
+
+/* Exponential and logarithmic functions.  */
+
+/* Exponential function of Z.  */
+__MATHCALL (cexp, (_Mdouble_complex_ __z));
+
+/* Natural logarithm of Z.  */
+__MATHCALL (clog, (_Mdouble_complex_ __z));
+
+#ifdef __USE_GNU
+/* The base 10 logarithm is not defined by the standard but to implement
+   the standard C++ library it is handy.  */
+__MATHCALL (clog10, (_Mdouble_complex_ __z));
+#endif
+
+/* Power functions.  */
+
+/* Return X to the Y power.  */
+__MATHCALL (cpow, (_Mdouble_complex_ __x, _Mdouble_complex_ __y));
+
+/* Return the square root of Z.  */
+__MATHCALL (csqrt, (_Mdouble_complex_ __z));
+
+
+/* Absolute value, conjugates, and projection.  */
+
+/* Absolute value of Z.  */
+__MATHDECL (_Mdouble_,cabs, (_Mdouble_complex_ __z));
+
+/* Argument value of Z.  */
+__MATHDECL (_Mdouble_,carg, (_Mdouble_complex_ __z));
+
+/* Complex conjugate of Z.  */
+__MATHCALL (conj, (_Mdouble_complex_ __z));
+
+/* Projection of Z onto the Riemann sphere.  */
+__MATHCALL (cproj, (_Mdouble_complex_ __z));
+
+
+/* Decomposing complex values.  */
+
+/* Imaginary part of Z.  */
+__MATHDECL (_Mdouble_,cimag, (_Mdouble_complex_ __z));
+
+/* Real part of Z.  */
+__MATHDECL (_Mdouble_,creal, (_Mdouble_complex_ __z));