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diff --git a/gcc/opt-functions.awk b/gcc/opt-functions.awk
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+#  Copyright (C) 2003,2004 Free Software Foundation, Inc.
+#  Contributed by Kelley Cook, June 2004.
+#  Original code from Neil Booth, May 2003.
+#
+# This program 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.
+# 
+# This program 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 this program; if not, write to the Free Software
+# Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+# Some common subroutines for use by opt[ch]-gen.awk.
+
+# Return nonzero if FLAGS contains a flag matching REGEX.
+function flag_set_p(regex, flags)
+{
+	return (" " flags " ") ~ (" " regex " ")
+}
+
+# Return STRING if FLAGS contains a flag matching regexp REGEX,
+# otherwise return the empty string.
+function test_flag(regex, flags, string)
+{
+	if (flag_set_p(regex, flags))
+		return string
+	return ""
+}
+
+# If FLAGS contains a "NAME(...argument...)" flag, return the value
+# of the argument.  Return the empty string otherwise.
+function opt_args(name, flags)
+{
+	flags = " " flags
+	if (flags !~ " " name "\\(")
+		return ""
+	sub(".* " name "\\(", "", flags)
+	sub("\\).*", "", flags)
+
+	return flags
+}
+
+# Return the Nth comma-separated element of S.  Return the empty string
+# if S does not contain N elements.
+function nth_arg(n, s)
+{
+	while (n-- > 0) {
+		if (s !~ ",")
+			return ""
+		sub("[^,]*, *", "", s)
+	}
+	sub(",.*", "", s)
+	return s
+}
+
+# Return a bitmask of CL_* values for option flags FLAGS.
+function switch_flags (flags)
+{
+	result = "0"
+	for (j = 0; j < n_langs; j++) {
+		regex = langs[j]
+		gsub ( "\\+", "\\+", regex )
+		result = result test_flag(regex, flags, " | " macros[j])
+	}
+	result = result \
+	  test_flag("Common", flags, " | CL_COMMON") \
+	  test_flag("Target", flags, " | CL_TARGET") \
+	  test_flag("Joined", flags, " | CL_JOINED") \
+	  test_flag("JoinedOrMissing", flags, " | CL_JOINED | CL_MISSING_OK") \
+	  test_flag("Separate", flags, " | CL_SEPARATE") \
+	  test_flag("RejectNegative", flags, " | CL_REJECT_NEGATIVE") \
+	  test_flag("UInteger", flags, " | CL_UINTEGER") \
+	  test_flag("Undocumented", flags,  " | CL_UNDOCUMENTED") \
+	  test_flag("Report", flags, " | CL_REPORT")
+	sub( "^0 \\| ", "", result )
+	return result
+}
+
+# If FLAGS includes a Var flag, return the name of the variable it specifies.
+# Return the empty string otherwise.
+function var_name(flags)
+{
+	return nth_arg(0, opt_args("Var", flags))
+}
+
+# Return true if the option described by FLAGS has a globally-visible state.
+function global_state_p(flags)
+{
+	return (var_name(flags) != "" \
+		|| opt_args("Mask", flags) != "" \
+		|| opt_args("InverseMask", flags) != "")
+}
+
+# Return true if the option described by FLAGS must have some state
+# associated with it.
+function needs_state_p(flags)
+{
+	return flag_set_p("Target", flags)
+}
+
+# If FLAGS describes an option that needs a static state variable,
+# return the name of that variable, otherwise return "".  NAME is
+# the name of the option.
+function static_var(name, flags)
+{
+	if (global_state_p(flags) || !needs_state_p(flags))
+		return ""
+	gsub ("[^A-Za-z0-9]", "_", name)
+	return "VAR_" name
+}
+
+# Return the type of variable that should be associated with the given flags.
+function var_type(flags)
+{
+	if (!flag_set_p("Joined.*", flags))
+		return "int "
+	else if (flag_set_p("UInteger", flags))
+		return "int "
+	else
+		return "const char *"
+}
+
+# Given that an option has flags FLAGS, return an initializer for the
+# "var_cond" and "var_value" fields of its cl_options[] entry.
+function var_set(flags)
+{
+	s = nth_arg(1, opt_args("Var", flags))
+	if (s != "")
+		return "CLVC_EQUAL, " s
+	s = opt_args("Mask", flags);
+	if (s != "") {
+		vn = var_name(flags);
+		if (vn)
+			return "CLVC_BIT_SET, OPTION_MASK_" s
+		else
+			return "CLVC_BIT_SET, MASK_" s
+	}
+	s = nth_arg(0, opt_args("InverseMask", flags));
+	if (s != "") {
+		vn = var_name(flags);
+		if (vn)
+			return "CLVC_BIT_CLEAR, OPTION_MASK_" s
+		else
+			return "CLVC_BIT_CLEAR, MASK_" s
+	}
+	if (var_type(flags) == "const char *")
+		return "CLVC_STRING, 0"
+	return "CLVC_BOOLEAN, 0"
+}
+
+# Given that an option called NAME has flags FLAGS, return an initializer
+# for the "flag_var" field of its cl_options[] entry.
+function var_ref(name, flags)
+{
+	name = var_name(flags) static_var(name, flags)
+	if (name != "")
+		return "&" name
+	if (opt_args("Mask", flags) != "")
+		return "&target_flags"
+	if (opt_args("InverseMask", flags) != "")
+		return "&target_flags"
+	return "0"
+}