kconfig: use default 'yy' prefix for lexer and parser

Flex and Bison provide an option to change the prefix of globally-
visible symbols.  This is useful to link multiple lexers and/or
parsers into the same executable.  However, Kconfig (and any other
host programs in kernel) uses a single lexer and parser.  I do not
see a good reason to change the default 'yy' prefix.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>

scripts/kconfig/Makefile

@@ -211,9 +211,6 @@ HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(srctree)/$(src)/check.sh $(HOSTCC)
 HOSTCFLAGS_zconf.lex.o	:= -I$(src)
 HOSTCFLAGS_zconf.tab.o	:= -I$(src)
 
-LEX_PREFIX_zconf	:= zconf
-YACC_PREFIX_zconf	:= zconf
-
 HOSTLOADLIBES_qconf	= $(KC_QT_LIBS)
 HOSTCXXFLAGS_qconf.o	= $(KC_QT_CFLAGS)
 

scripts/kconfig/zconf.l

@@ -106,11 +106,11 @@ n	[A-Za-z0-9_-]
 		current_pos.file = current_file;
 		current_pos.lineno = current_file->lineno;
 		if (id && id->flags & TF_COMMAND) {
-			zconflval.id = id;
+			yylval.id = id;
 			return id->token;
 		}
 		alloc_string(yytext, yyleng);
-		zconflval.string = text;
+		yylval.string = text;
 		return T_WORD;
 	}
 	.	warn_ignored_character(*yytext);
@@ -142,11 +142,11 @@ n	[A-Za-z0-9_-]
 	({n}|[/.])+	{
 		const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
 		if (id && id->flags & TF_PARAM) {
-			zconflval.id = id;
+			yylval.id = id;
 			return id->token;
 		}
 		alloc_string(yytext, yyleng);
-		zconflval.string = text;
+		yylval.string = text;
 		return T_WORD;
 	}
 	#.*	/* comment */
@@ -161,7 +161,7 @@ n	[A-Za-z0-9_-]
 <STRING>{
 	[^'"\\\n]+/\n	{
 		append_string(yytext, yyleng);
-		zconflval.string = text;
+		yylval.string = text;
 		return T_WORD_QUOTE;
 	}
 	[^'"\\\n]+	{
@@ -169,7 +169,7 @@ n	[A-Za-z0-9_-]
 	}
 	\\.?/\n	{
 		append_string(yytext + 1, yyleng - 1);
-		zconflval.string = text;
+		yylval.string = text;
 		return T_WORD_QUOTE;
 	}
 	\\.?	{
@@ -178,7 +178,7 @@ n	[A-Za-z0-9_-]
 	\'|\"	{
 		if (str == yytext[0]) {
 			BEGIN(PARAM);
-			zconflval.string = text;
+			yylval.string = text;
 			return T_WORD_QUOTE;
 		} else
 			append_string(yytext, 1);
@@ -261,7 +261,7 @@ void zconf_starthelp(void)
 
 static void zconf_endhelp(void)
 {
-	zconflval.string = text;
+	yylval.string = text;
 	BEGIN(INITIAL);
 }
 

scripts/kconfig/zconf.y

@@ -20,10 +20,10 @@
 
 int cdebug = PRINTD;
 
-extern int zconflex(void);
+int yylex(void);
+static void yyerror(const char *err);
 static void zconfprint(const char *err, ...);
 static void zconf_error(const char *err, ...);
-static void zconferror(const char *err);
 static bool zconf_endtoken(const struct kconf_id *id, int starttoken, int endtoken);
 
 struct symbol *symbol_hash[SYMBOL_HASHSIZE];
@@ -531,9 +531,9 @@ void conf_parse(const char *name)
 	_menu_init();
 
 	if (getenv("ZCONF_DEBUG"))
-		zconfdebug = 1;
-	zconfparse();
-	if (zconfnerrs)
+		yydebug = 1;
+	yyparse();
+	if (yynerrs)
 		exit(1);
 	if (!modules_sym)
 		modules_sym = sym_find( "n" );
@@ -546,9 +546,9 @@ void conf_parse(const char *name)
 	menu_finalize(&rootmenu);
 	for_all_symbols(i, sym) {
 		if (sym_check_deps(sym))
-			zconfnerrs++;
+			yynerrs++;
 	}
-	if (zconfnerrs)
+	if (yynerrs)
 		exit(1);
 	sym_set_change_count(1);
 }
@@ -573,7 +573,7 @@ static bool zconf_endtoken(const struct kconf_id *id, int starttoken, int endtok
 	if (id->token != endtoken) {
 		zconf_error("unexpected '%s' within %s block",
 			id->name, zconf_tokenname(starttoken));
-		zconfnerrs++;
+		yynerrs++;
 		return false;
 	}
 	if (current_menu->file != current_file) {
@@ -582,7 +582,7 @@ static bool zconf_endtoken(const struct kconf_id *id, int starttoken, int endtok
 		fprintf(stderr, "%s:%d: location of the '%s'\n",
 			current_menu->file->name, current_menu->lineno,
 			zconf_tokenname(starttoken));
-		zconfnerrs++;
+		yynerrs++;
 		return false;
 	}
 	return true;
@@ -603,7 +603,7 @@ static void zconf_error(const char *err, ...)
 {
 	va_list ap;
 
-	zconfnerrs++;
+	yynerrs++;
 	fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
 	va_start(ap, err);
 	vfprintf(stderr, err, ap);
@@ -611,7 +611,7 @@ static void zconf_error(const char *err, ...)
 	fprintf(stderr, "\n");
 }
 
-static void zconferror(const char *err)
+static void yyerror(const char *err)
 {
 	fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
 }