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diff --git a/libgfortran/kinds-override.h b/libgfortran/kinds-override.h
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+/* Header used to override things detected by the mk-kinds-h.sh script.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+
+This file is part of the GNU Fortran runtime library (libgfortran).
+
+Libgfortran 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, or (at your option)
+any later version.
+
+Libgfortran 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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+
+/* What are the C types corresponding to the real(kind=10) and
+   real(kind=16) types? We currently rely on the following assumptions:
+     -- if real(kind=10) exists, i.e. if HAVE_GFC_REAL_10 is defined,
+        then it is necessarily the "long double" type
+     -- if real(kind=16) exists, then:
+         * if HAVE_GFC_REAL_10, real(kind=16) is "__float128"
+	 * otherwise, real(kind=16) is "long double"
+   To allow to change this in the future, we create the
+   GFC_REAL_16_IS_FLOAT128 macro that is used throughout libgfortran.  */
+
+#if defined(HAVE_GFC_REAL_16)
+# if defined(HAVE_GFC_REAL_10)
+#  define GFC_REAL_16_IS_FLOAT128
+#  if !defined(HAVE_FLOAT128)
+#   error "Where has __float128 gone?"
+#  endif
+# else
+#  define GFC_REAL_16_IS_LONG_DOUBLE
+# endif
+#endif
+