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>

3 files changed, 19 insertions, 22 deletions

diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 61cdc5efb98a..2ad1cf57a55f 100644
--- a/scripts/kconfig/Makefile
+++ b/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)
 
diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
index c410d257da06..07e074dc68a1 100644
--- a/scripts/kconfig/zconf.l
+++ b/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);
 }
 
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index d2964c68f066..21ce883e5d9e 100644
--- a/scripts/kconfig/zconf.y
+++ b/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);
 }