--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/c6x/genopt.sh	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,59 @@
+#!/bin/sh
+# Generate c6x-tables.opt from the lists in *.def.
+# Copyright (C) 2011-2017 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/>.
+
+cat <<EOF
+; -*- buffer-read-only: t -*-
+; Generated automatically by genopt.sh from c6x-isas.def.
+;
+; Copyright (C) 2011-2017 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/>.
+
+Enum
+Name(c6x_isa) Type(int)
+Known C6X ISAs (for use with the -march= option):
+
+EOF
+
+awk -F'[(, 	]+' 'BEGIN {
+    value = 0
+}
+/^C6X_ISA/ {
+    name = $2
+    gsub("\"", "", name)
+    print "EnumValue"
+    print "Enum(c6x_isa) String(" name ") Value(" value ")"
+    print ""
+    value++
+}' $1/c6x-isas.def