* src-release (GDB_SUPPORT_DIRS): Add libdecnumber.

* libdecnumber: New directory, imported from GCC.

libdecnumber/decExcept.h

@@ -0,0 +1,39 @@
+/* Temporary library support for decimal floating point.
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC 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 2, or (at your option)
+   any later version.
+
+   In addition to the permissions in the GNU General Public License, the
+   Free Software Foundation gives you unlimited permission to link the
+   compiled version of this file into combinations with other programs,
+   and to distribute those combinations without any restriction coming
+   from the use of this file.  (The General Public License restrictions
+   do apply in other respects; for example, they cover modification of
+   the file, and distribution when not linked into a combine
+   executable.)
+
+   GCC 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 GCC; see the file COPYING.  If not, write to the Free
+   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#include <fenv.h>
+#include "config.h"
+#include "decContext.h"
+
+#define DFP_EXCEPTIONS_ENABLED 1
+#define DFP_HANDLE_EXCEPTIONS(A) __dfp_raise_except(A)
+
+void __dfp_clear_except (void);
+int __dfp_test_except (int);
+void __dfp_raise_except (int);