--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/common/common-targhooks.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,83 @@
+/* Default common target hook functions.
+   Copyright (C) 2003-2017 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 3, or (at your option) any later
+version.
+
+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 COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "common/common-target.h"
+#include "common/common-targhooks.h"
+
+/* Determine the exception handling mechanism for the target.  */
+
+enum unwind_info_type
+default_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
+{
+  /* Obey the configure switch to turn on sjlj exceptions.  */
+#ifdef CONFIG_SJLJ_EXCEPTIONS
+  if (CONFIG_SJLJ_EXCEPTIONS)
+    return UI_SJLJ;
+#endif
+
+  /* ??? Change all users to the hook, then poison this.  */
+#ifdef DWARF2_UNWIND_INFO
+  if (DWARF2_UNWIND_INFO)
+    return UI_DWARF2;
+#endif
+
+  return UI_SJLJ;
+}
+
+/* To be used by targets that force dwarf2 unwind enabled.  */
+
+enum unwind_info_type
+dwarf2_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
+{
+  /* Obey the configure switch to turn on sjlj exceptions.  */
+#ifdef CONFIG_SJLJ_EXCEPTIONS
+  if (CONFIG_SJLJ_EXCEPTIONS)
+    return UI_SJLJ;
+#endif
+
+  return UI_DWARF2;
+}
+
+/* To be used by targets that force sjlj unwind enabled.  */
+
+enum unwind_info_type
+sjlj_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
+{
+  return UI_SJLJ;
+}
+
+/* Default version of TARGET_HANDLE_OPTION.  */
+
+bool
+default_target_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED,
+			      struct gcc_options *opts_set ATTRIBUTE_UNUSED,
+			      const struct cl_decoded_option *decoded ATTRIBUTE_UNUSED,
+			      location_t loc ATTRIBUTE_UNUSED)
+{
+  return true;
+}
+
+const struct default_options empty_optimization_table[] =
+  {
+    { OPT_LEVELS_NONE, 0, NULL, 0 }
+  };