[thirdparty/gcc.git] / gcc / opt-functions.awk

#  Copyright (C) 2003-2016 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 3, 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; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

# Some common subroutines for use by opt[ch]-gen.awk.

# Define some helpful character classes, for portability.
BEGIN {
	lower = "abcdefghijklmnopqrstuvwxyz"
	upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
	digit = "0123456789"
	alnum = lower "" upper "" digit
}

# Return nonzero if FLAGS contains a flag matching REGEX.
function flag_set_p(regex, flags)
{
    # Ignore the arguments of flags with arguments.
    gsub ("\\([^)]+\\)", "", 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 ""
}

# Return a field initializer, with trailing comma, for a field that is
# 1 if FLAGS contains a flag matching REGEX and 0 otherwise.
function flag_init(regex, flags)
{
	if (flag_set_p(regex, flags))
		return "1 /* " regex " */, "
	else
		return "0, "
}

# 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)
	if (flags ~ "^{")
	{
		sub ("^{", "", flags)
		sub("}\\).*", "", flags)
	}
	else
		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("PchIgnore", flags, " | CL_PCH_IGNORE") \
	  test_flag("Driver", flags, " | CL_DRIVER") \
	  test_flag("Joined", flags, " | CL_JOINED") \
	  test_flag("JoinedOrMissing", flags, " | CL_JOINED") \
	  test_flag("Separate", flags, " | CL_SEPARATE") \
	  test_flag("Undocumented", flags,  " | CL_UNDOCUMENTED") \
	  test_flag("NoDWARFRecord", flags,  " | CL_NO_DWARF_RECORD") \
	  test_flag("Warning", flags,  " | CL_WARNING") \
	  test_flag("Optimization", flags,  " | CL_OPTIMIZATION")
	sub( "^0 \\| ", "", result )
	return result
}

# Return bit-field initializers for option flags FLAGS.
function switch_bit_fields (flags)
{
	vn = var_name(flags);
	if (host_wide_int[vn] == "yes")
		hwi = "Host_Wide_Int"
	else
		hwi = ""
	result = ""
	sep_args = opt_args("Args", flags)
	if (sep_args == "")
		sep_args = 0
	else
		sep_args--
	result = result sep_args ", "

	result = result \
	  flag_init("SeparateAlias", flags) \
	  flag_init("NegativeAlias", flags) \
	  flag_init("NoDriverArg", flags) \
	  flag_init("RejectDriver", flags) \
	  flag_init("RejectNegative", flags) \
	  flag_init("JoinedOrMissing", flags) \
	  flag_init("UInteger", flags) \
	  flag_init("Host_Wide_Int", hwi) \
	  flag_init("ToLower", flags) \
	  flag_init("Report", flags)

	sub(", $", "", 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 the name of the variable if FLAGS has a HOST_WIDE_INT variable. 
# Return the empty string otherwise.
function host_wide_int_var_name(flags)
{
	split (flags, array, "[ \t]+")
	if (array[1] == "HOST_WIDE_INT")
		return array[2]
	else
		return ""
}

# 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) \
		&& !flag_set_p("Alias.*", flags) \
		&& !flag_set_p("Ignore", flags))
}

# If FLAGS describes an option that needs state without a public
# variable name, return the name of that field, minus the initial
# "x_", 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 ("[^" alnum "]", "_", 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("Defer", flags))
		return "void *"
	else if (flag_set_p("Enum.*", flags)) {
		en = opt_args("Enum", flags);
		return enum_type[en] " "
	}
	else if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags))
		return "int "
	else if (flag_set_p("UInteger", flags))
		return "int "
	else
		return "const char *"
}

# Return the type of variable that should be associated with the given flags
# for use within a structure.  Simple variables are changed to signed char
# type instead of int to save space.
function var_type_struct(flags)
{
	if (flag_set_p("UInteger", flags))
		return "int "
	else if (flag_set_p("Enum.*", flags)) {
		en = opt_args("Enum", flags);
		return enum_type[en] " "
	}
	else if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags)) {
		if (flag_set_p(".*Mask.*", flags)) {
			if (host_wide_int[var_name(flags)] == "yes")
				return "HOST_WIDE_INT "
			else
				return "int "
		}
		else
			return "signed char "
	}
	else
		return "const char *"
}

# Given that an option has flags FLAGS, return an initializer for the
# "var_enum", "var_type" and "var_value" fields of its cl_options[] entry.
function var_set(flags)
{
	if (flag_set_p("Defer", flags))
		return "0, CLVC_DEFER, 0"
	s = nth_arg(1, opt_args("Var", flags))
	if (s != "")
		return "0, CLVC_EQUAL, " s
	s = opt_args("Mask", flags);
	if (s != "") {
		vn = var_name(flags);
		if (vn)
			return "0, CLVC_BIT_SET, OPTION_MASK_" s
		else
			return "0, CLVC_BIT_SET, MASK_" s
	}
	s = nth_arg(0, opt_args("InverseMask", flags));
	if (s != "") {
		vn = var_name(flags);
		if (vn)
			return "0, CLVC_BIT_CLEAR, OPTION_MASK_" s
		else
			return "0, CLVC_BIT_CLEAR, MASK_" s
	}
	if (flag_set_p("Enum.*", flags)) {
		en = opt_args("Enum", flags);
		return enum_index[en] ", CLVC_ENUM, 0"
	}
	if (var_type(flags) == "const char *")
		return "0, CLVC_STRING, 0"
	return "0, 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 "offsetof (struct gcc_options, x_" name ")"
	if (opt_args("Mask", flags) != "")
		return "offsetof (struct gcc_options, x_target_flags)"
	if (opt_args("InverseMask", flags) != "")
		return "offsetof (struct gcc_options, x_target_flags)"
	return "-1"
}

# Given the option called NAME return a sanitized version of its name.
function opt_sanitized_name(name)
{
	gsub ("[^" alnum "]", "_", name)
	return name
}

# Given the option called NAME return the appropriate enum for it.
function opt_enum(name)
{
	return "OPT_" opt_sanitized_name(name)
}

# Given the language called NAME return a sanitized version of its name.
function lang_sanitized_name(name)
{
    gsub( "[^" alnum "_]", "X", name )
    return name
}

# Search for a valid var_name among all OPTS equal to option NAME.
# If not found, return "".
function search_var_name(name, opt_numbers, opts, flags, n_opts)
{
    opt_var_name = var_name(flags[opt_numbers[name]]);
    if (opt_var_name != "") {
        return opt_var_name;
    }
    for (k = 0; k < n_opts; k++) {
        if (opts[k] == name && var_name(flags[k]) != "") {
            return var_name(flags[k]);
        }
    }
    return ""
}

# Handle LangEnabledBy(ENABLED_BY_LANGS, ENABLEDBY_NAME, ENABLEDBY_POSARG,
# ENABLEDBY_NEGARG). This function does not return anything.
function lang_enabled_by(enabledby_langs, enabledby_name, enabledby_posarg, enabledby_negarg)
{
    n_enabledby_arg_langs = split(enabledby_langs, enabledby_arg_langs, " ");
    if (enabledby_posarg != "" && enabledby_negarg != "") {
        with_args = "," enabledby_posarg "," enabledby_negarg
    } else if (enabledby_posarg == "" && enabledby_negarg == "") {
        with_args = ""
    } else {
        print "#error " opts[i] " LangEnabledBy("enabledby_langs","enabledby_name", " \
            enabledby_posarg", " enabledby_negargs                  \
            ") with three arguments, it should have either 2 or 4"
    }

    n_enabledby_array = split(enabledby_name, enabledby_array, " \\|\\| ");
    for (k = 1; k <= n_enabledby_array; k++) {
        enabledby_index = opt_numbers[enabledby_array[k]];
        if (enabledby_index == "") {
             print "#error " opts[i] " LangEnabledBy("enabledby_langs","enabledby_name", " \
                 enabledby_posarg", " enabledby_negargs"), unknown option '" enabledby_name "'"
        } else {
            for (j = 1; j <= n_enabledby_arg_langs; j++) {
                 lang_name = lang_sanitized_name(enabledby_arg_langs[j]);
                 lang_index = lang_numbers[enabledby_arg_langs[j]];
                 if (enables[lang_name,enabledby_array[k]] == "") {
                     enabledby[lang_name,n_enabledby_lang[lang_index]] = enabledby_array[k];
                     n_enabledby_lang[lang_index]++;
                 }
                 enables[lang_name,enabledby_array[k]] \
                     = enables[lang_name,enabledby_array[k]] opts[i] with_args ";";
            }
        }
    }
}
Commit	Line	Data
f1717362	1	# Copyright (C) 2003-2016 Free Software Foundation, Inc.
e8b212b8	2	# Contributed by Kelley Cook, June 2004.
	3	# Original code from Neil Booth, May 2003.
	4	#
	5	# This program is free software; you can redistribute it and/or modify it
	6	# under the terms of the GNU General Public License as published by the
8c4c00c1	7	# Free Software Foundation; either version 3, or (at your option) any
e8b212b8	8	# later version.
	9	#
	10	# This program is distributed in the hope that it will be useful,
	11	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	# GNU General Public License for more details.
	14	#
	15	# You should have received a copy of the GNU General Public License
8c4c00c1	16	# along with this program; see the file COPYING3. If not see
8c4c00c1	17	# <http://www.gnu.org/licenses/>.
e8b212b8	18
	19	# Some common subroutines for use by opt[ch]-gen.awk.
	20
ca40ed4b	21	# Define some helpful character classes, for portability.
	22	BEGIN {
	23	lower = "abcdefghijklmnopqrstuvwxyz"
	24	upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
	25	digit = "0123456789"
	26	alnum = lower "" upper "" digit
	27	}
	28
a150399d	29	# Return nonzero if FLAGS contains a flag matching REGEX.
	30	function flag_set_p(regex, flags)
	31	{
d3b7ee7c	32	# Ignore the arguments of flags with arguments.
	33	gsub ("\\([^)]+\\)", "", flags);
	34	return (" " flags " ") ~ (" " regex " ")
a150399d	35	}
	36
	37	# Return STRING if FLAGS contains a flag matching regexp REGEX,
	38	# otherwise return the empty string.
	39	function test_flag(regex, flags, string)
	40	{
	41	if (flag_set_p(regex, flags))
	42	return string
	43	return ""
	44	}
	45
ec840af4	46	# Return a field initializer, with trailing comma, for a field that is
	47	# 1 if FLAGS contains a flag matching REGEX and 0 otherwise.
	48	function flag_init(regex, flags)
	49	{
	50	if (flag_set_p(regex, flags))
	51	return "1 /* " regex " */, "
	52	else
	53	return "0, "
	54	}
	55
ff05e09e	56	# If FLAGS contains a "NAME(...argument...)" flag, return the value
	57	# of the argument. Return the empty string otherwise.
	58	function opt_args(name, flags)
	59	{
	60	flags = " " flags
	61	if (flags !~ " " name "\\(")
	62	return ""
	63	sub(".* " name "\\(", "", flags)
65441c28	64	if (flags ~ "^{")
	65	{
	66	sub ("^{", "", flags)
	67	sub("}\\).*", "", flags)
	68	}
	69	else
	70	sub("\\).*", "", flags)
ff05e09e	71
	72	return flags
	73	}
	74
	75	# Return the Nth comma-separated element of S. Return the empty string
	76	# if S does not contain N elements.
	77	function nth_arg(n, s)
	78	{
	79	while (n-- > 0) {
	80	if (s !~ ",")
	81	return ""
	82	sub("[^,], ", "", s)
	83	}
	84	sub(",.*", "", s)
	85	return s
	86	}
	87
	88	# Return a bitmask of CL_* values for option flags FLAGS.
e8b212b8	89	function switch_flags (flags)
e8b212b8	90	{
e8b212b8	91	result = "0"
e8b212b8	92	for (j = 0; j < n_langs; j++) {
a150399d	93	regex = langs[j]
e8b212b8	94	gsub ( "\\+", "\\+", regex )
a150399d	95	result = result test_flag(regex, flags, " \| " macros[j])
e8b212b8	96	}
a150399d	97	result = result \
	98	test_flag("Common", flags, " \| CL_COMMON") \
	99	test_flag("Target", flags, " \| CL_TARGET") \
d8f2baf5	100	test_flag("PchIgnore", flags, " \| CL_PCH_IGNORE") \
e28aa114	101	test_flag("Driver", flags, " \| CL_DRIVER") \
a150399d	102	test_flag("Joined", flags, " \| CL_JOINED") \
ec840af4	103	test_flag("JoinedOrMissing", flags, " \| CL_JOINED") \
a150399d	104	test_flag("Separate", flags, " \| CL_SEPARATE") \
a150399d	105	test_flag("Undocumented", flags, " \| CL_UNDOCUMENTED") \
3fe1aabe	106	test_flag("NoDWARFRecord", flags, " \| CL_NO_DWARF_RECORD") \
87c75316	107	test_flag("Warning", flags, " \| CL_WARNING") \
ec840af4	108	test_flag("Optimization", flags, " \| CL_OPTIMIZATION")
	109	sub( "^0 \\\| ", "", result )
	110	return result
	111	}
	112
	113	# Return bit-field initializers for option flags FLAGS.
	114	function switch_bit_fields (flags)
	115	{
72ec6882	116	vn = var_name(flags);
	117	if (host_wide_int[vn] == "yes")
	118	hwi = "Host_Wide_Int"
	119	else
	120	hwi = ""
ec840af4	121	result = ""
e2028bfa	122	sep_args = opt_args("Args", flags)
ec840af4	123	if (sep_args == "")
	124	sep_args = 0
	125	else
e2028bfa	126	sep_args--
ec840af4	127	result = result sep_args ", "
	128
	129	result = result \
	130	flag_init("SeparateAlias", flags) \
	131	flag_init("NegativeAlias", flags) \
	132	flag_init("NoDriverArg", flags) \
	133	flag_init("RejectDriver", flags) \
	134	flag_init("RejectNegative", flags) \
	135	flag_init("JoinedOrMissing", flags) \
	136	flag_init("UInteger", flags) \
72ec6882	137	flag_init("Host_Wide_Int", hwi) \
cb14e058	138	flag_init("ToLower", flags) \
ec840af4	139	flag_init("Report", flags)
	140
	141	sub(", $", "", result)
e8b212b8	142	return result
	143	}
	144
ff05e09e	145	# If FLAGS includes a Var flag, return the name of the variable it specifies.
ff05e09e	146	# Return the empty string otherwise.
e8b212b8	147	function var_name(flags)
e8b212b8	148	{
ff05e09e	149	return nth_arg(0, opt_args("Var", flags))
e8b212b8	150	}
ff05e09e	151
72ec6882	152	# Return the name of the variable if FLAGS has a HOST_WIDE_INT variable.
	153	# Return the empty string otherwise.
	154	function host_wide_int_var_name(flags)
	155	{
	156	split (flags, array, "[ \t]+")
	157	if (array[1] == "HOST_WIDE_INT")
	158	return array[2]
	159	else
	160	return ""
	161	}
	162
d6907cfa	163	# Return true if the option described by FLAGS has a globally-visible state.
	164	function global_state_p(flags)
	165	{
	166	return (var_name(flags) != "" \
	167	\|\| opt_args("Mask", flags) != "" \
	168	\|\| opt_args("InverseMask", flags) != "")
	169	}
	170
	171	# Return true if the option described by FLAGS must have some state
	172	# associated with it.
	173	function needs_state_p(flags)
	174	{
3b0273a1	175	return (flag_set_p("Target", flags) \
	176	&& !flag_set_p("Alias.*", flags) \
	177	&& !flag_set_p("Ignore", flags))
d6907cfa	178	}
d6907cfa	179
2c5d2e39	180	# If FLAGS describes an option that needs state without a public
	181	# variable name, return the name of that field, minus the initial
	182	# "x_", otherwise return "". NAME is the name of the option.
d6907cfa	183	function static_var(name, flags)
	184	{
	185	if (global_state_p(flags) \|\| !needs_state_p(flags))
	186	return ""
ca40ed4b	187	gsub ("[^" alnum "]", "_", name)
d6907cfa	188	return "VAR_" name
	189	}
	190
0fe44c73	191	# Return the type of variable that should be associated with the given flags.
	192	function var_type(flags)
	193	{
f0da0668	194	if (flag_set_p("Defer", flags))
f0da0668	195	return "void *"
d62a5950	196	else if (flag_set_p("Enum.*", flags)) {
	197	en = opt_args("Enum", flags);
	198	return enum_type[en] " "
	199	}
f0da0668	200	else if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags))
0fe44c73	201	return "int "
	202	else if (flag_set_p("UInteger", flags))
	203	return "int "
	204	else
	205	return "const char *"
	206	}
	207
46f8e3b0	208	# Return the type of variable that should be associated with the given flags
9d2a6747	209	# for use within a structure. Simple variables are changed to signed char
46f8e3b0	210	# type instead of int to save space.
	211	function var_type_struct(flags)
	212	{
	213	if (flag_set_p("UInteger", flags))
	214	return "int "
a4a5a0e9	215	else if (flag_set_p("Enum.*", flags)) {
	216	en = opt_args("Enum", flags);
	217	return enum_type[en] " "
	218	}
e28aa114	219	else if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags)) {
72ec6882	220	if (flag_set_p(".Mask.", flags)) {
	221	if (host_wide_int[var_name(flags)] == "yes")
	222	return "HOST_WIDE_INT "
	223	else
	224	return "int "
	225	}
46f8e3b0	226	else
9d2a6747	227	return "signed char "
46f8e3b0	228	}
	229	else
	230	return "const char *"
	231	}
	232
ff05e09e	233	# Given that an option has flags FLAGS, return an initializer for the
d62a5950	234	# "var_enum", "var_type" and "var_value" fields of its cl_options[] entry.
e8b212b8	235	function var_set(flags)
e8b212b8	236	{
f0da0668	237	if (flag_set_p("Defer", flags))
d62a5950	238	return "0, CLVC_DEFER, 0"
ff05e09e	239	s = nth_arg(1, opt_args("Var", flags))
ff05e09e	240	if (s != "")
d62a5950	241	return "0, CLVC_EQUAL, " s
ff05e09e	242	s = opt_args("Mask", flags);
b3937ebd	243	if (s != "") {
	244	vn = var_name(flags);
	245	if (vn)
d62a5950	246	return "0, CLVC_BIT_SET, OPTION_MASK_" s
b3937ebd	247	else
d62a5950	248	return "0, CLVC_BIT_SET, MASK_" s
b3937ebd	249	}
ff05e09e	250	s = nth_arg(0, opt_args("InverseMask", flags));
383a5f1b	251	if (s != "") {
	252	vn = var_name(flags);
	253	if (vn)
d62a5950	254	return "0, CLVC_BIT_CLEAR, OPTION_MASK_" s
0fe44c73	255	else
d62a5950	256	return "0, CLVC_BIT_CLEAR, MASK_" s
	257	}
	258	if (flag_set_p("Enum.*", flags)) {
	259	en = opt_args("Enum", flags);
	260	return enum_index[en] ", CLVC_ENUM, 0"
383a5f1b	261	}
0fe44c73	262	if (var_type(flags) == "const char *")
d62a5950	263	return "0, CLVC_STRING, 0"
d62a5950	264	return "0, CLVC_BOOLEAN, 0"
e8b212b8	265	}
ff05e09e	266
d6907cfa	267	# Given that an option called NAME has flags FLAGS, return an initializer
	268	# for the "flag_var" field of its cl_options[] entry.
	269	function var_ref(name, flags)
e8b212b8	270	{
d6907cfa	271	name = var_name(flags) static_var(name, flags)
ff05e09e	272	if (name != "")
2c5d2e39	273	return "offsetof (struct gcc_options, x_" name ")"
ff05e09e	274	if (opt_args("Mask", flags) != "")
2c5d2e39	275	return "offsetof (struct gcc_options, x_target_flags)"
ff05e09e	276	if (opt_args("InverseMask", flags) != "")
2c5d2e39	277	return "offsetof (struct gcc_options, x_target_flags)"
2c5d2e39	278	return "-1"
e8b212b8	279	}
d4c7816a	280
	281	# Given the option called NAME return a sanitized version of its name.
	282	function opt_sanitized_name(name)
	283	{
ca40ed4b	284	gsub ("[^" alnum "]", "_", name)
d4c7816a	285	return name
	286	}
	287
	288	# Given the option called NAME return the appropriate enum for it.
	289	function opt_enum(name)
	290	{
	291	return "OPT_" opt_sanitized_name(name)
	292	}
d3b7ee7c	293
	294	# Given the language called NAME return a sanitized version of its name.
	295	function lang_sanitized_name(name)
	296	{
	297	gsub( "[^" alnum "_]", "X", name )
	298	return name
	299	}
1090f26f	300
	301	# Search for a valid var_name among all OPTS equal to option NAME.
	302	# If not found, return "".
	303	function search_var_name(name, opt_numbers, opts, flags, n_opts)
	304	{
	305	opt_var_name = var_name(flags[opt_numbers[name]]);
	306	if (opt_var_name != "") {
	307	return opt_var_name;
	308	}
	309	for (k = 0; k < n_opts; k++) {
	310	if (opts[k] == name && var_name(flags[k]) != "") {
	311	return var_name(flags[k]);
	312	}
	313	}
	314	return ""
	315	}
5493f55e	316
	317	# Handle LangEnabledBy(ENABLED_BY_LANGS, ENABLEDBY_NAME, ENABLEDBY_POSARG,
	318	# ENABLEDBY_NEGARG). This function does not return anything.
	319	function lang_enabled_by(enabledby_langs, enabledby_name, enabledby_posarg, enabledby_negarg)
	320	{
	321	n_enabledby_arg_langs = split(enabledby_langs, enabledby_arg_langs, " ");
1eaf1dbe	322	if (enabledby_posarg != "" && enabledby_negarg != "") {
	323	with_args = "," enabledby_posarg "," enabledby_negarg
	324	} else if (enabledby_posarg == "" && enabledby_negarg == "") {
	325	with_args = ""
5493f55e	326	} else {
5463f502	327	print "#error " opts[i] " LangEnabledBy("enabledby_langs","enabledby_name", " \
1eaf1dbe	328	enabledby_posarg", " enabledby_negargs \
	329	") with three arguments, it should have either 2 or 4"
	330	}
	331
	332	n_enabledby_array = split(enabledby_name, enabledby_array, " \\\|\\\| ");
	333	for (k = 1; k <= n_enabledby_array; k++) {
	334	enabledby_index = opt_numbers[enabledby_array[k]];
	335	if (enabledby_index == "") {
5463f502	336	print "#error " opts[i] " LangEnabledBy("enabledby_langs","enabledby_name", " \
5463f502	337	enabledby_posarg", " enabledby_negargs"), unknown option '" enabledby_name "'"
5493f55e	338	} else {
1eaf1dbe	339	for (j = 1; j <= n_enabledby_arg_langs; j++) {
	340	lang_name = lang_sanitized_name(enabledby_arg_langs[j]);
	341	lang_index = lang_numbers[enabledby_arg_langs[j]];
	342	if (enables[lang_name,enabledby_array[k]] == "") {
	343	enabledby[lang_name,n_enabledby_lang[lang_index]] = enabledby_array[k];
	344	n_enabledby_lang[lang_index]++;
	345	}
	346	enables[lang_name,enabledby_array[k]] \
	347	= enables[lang_name,enabledby_array[k]] opts[i] with_args ";";
5493f55e	348	}
5493f55e	349	}
	350	}
	351	}