kconfig: call env_write_dep() right after yyparse()

This allows preprocess.c to free up all of its resources when the parse
stage is finished. It also ensures conf_write_autoconf_cmd() produces
consistent results even if called multiple times for any reason.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/confdata.c

@@ -994,13 +994,9 @@ static int conf_write_autoconf_cmd(const char *autoconf_name)
 		return -1;
 	}
 
-	fputs(str_get(&autoconf_cmd), out);
-
-	fprintf(out, "\n%s: $(deps_config)\n\n", autoconf_name);
+	fprintf(out, "autoconfig := %s\n", autoconf_name);
 
-	env_write_dep(out, autoconf_name);
-
-	fprintf(out, "\n$(deps_config): ;\n");
+	fputs(str_get(&autoconf_cmd), out);
 
 	fflush(out);
 	ret = ferror(out); /* error check for all fprintf() calls */

scripts/kconfig/lkc_proto.h

@@ -46,7 +46,7 @@ enum variable_flavor {
 	VAR_RECURSIVE,
 	VAR_APPEND,
 };
-void env_write_dep(FILE *f, const char *auto_conf_name);
+void env_write_dep(struct gstr *gs);
 void variable_add(const char *name, const char *value,
 		  enum variable_flavor flavor);
 void variable_all_del(void);

scripts/kconfig/parser.y

@@ -482,7 +482,7 @@ void conf_parse(const char *name)
 
 	autoconf_cmd = str_new();
 
-	str_printf(&autoconf_cmd, "deps_config := \\\n");
+	str_printf(&autoconf_cmd, "\ndeps_config := \\\n");
 
 	zconf_initscan(name);
 
@@ -492,6 +492,13 @@ void conf_parse(const char *name)
 		yydebug = 1;
 	yyparse();
 
+	str_printf(&autoconf_cmd,
+		   "\n"
+		   "$(autoconfig): $(deps_config)\n"
+		   "$(deps_config): ;\n");
+
+	env_write_dep(&autoconf_cmd);
+
 	/* Variables are expanded in the parse phase. We can free them here. */
 	variable_all_del();
 

scripts/kconfig/preprocess.c

@@ -87,14 +87,17 @@ static char *env_expand(const char *name)
 	return xstrdup(value);
 }
 
-void env_write_dep(FILE *f, const char *autoconfig_name)
+void env_write_dep(struct gstr *s)
 {
 	struct env *e, *tmp;
 
 	list_for_each_entry_safe(e, tmp, &env_list, node) {
-		fprintf(f, "ifneq \"$(%s)\" \"%s\"\n", e->name, e->value);
-		fprintf(f, "%s: FORCE\n", autoconfig_name);
-		fprintf(f, "endif\n");
+		str_printf(s,
+			   "\n"
+			   "ifneq \"$(%s)\" \"%s\"\n"
+			   "$(autoconfig): FORCE\n"
+			   "endif\n",
+			   e->name, e->value);
 		env_del(e);
 	}
 }