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diff --git a/sysdeps/generic/libm-alias-float128.h b/sysdeps/generic/libm-alias-float128.h
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+++ b/sysdeps/generic/libm-alias-float128.h
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+/* Define aliases for libm _Float128 functions.
+   Copyright (C) 2017 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/>.  */
+
+#ifndef _LIBM_ALIAS_FLOAT128_H
+#define _LIBM_ALIAS_FLOAT128_H
+
+/* Define aliases for a _Float128 libm function that has internal name
+   FROM ## f128 ## R and public names TO ## suffix ## R for each
+   suffix of a supported floating-point type with the same format as
+   _Float128.  This should only be used for functions where such
+   public names exist for _FloatN types, not for
+   implementation-namespace exported names (where there is one name
+   per format, not per type) or for obsolescent functions not provided
+   for _FloatN types.  */
+#define libm_alias_float128_r(from, to, r)		\
+  weak_alias (from ## f128 ## r, to ## f128 ## r)
+
+/* Likewise, but without the R suffix.  */
+#define libm_alias_float128(from, to) libm_alias_float128_r (from, to, )
+
+#endif