kconfig: fix `zconfdebug' extern declaration

This symbol is only exist if YYDEBUG is defined.

Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 4 insertions, 2 deletions

diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index a542c6ba84b3..6d38b7c9c824 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -68,10 +68,12 @@ struct kconf_id {
         enum symbol_type stype;
 };
 
+#ifdef YYDEBUG
+extern int zconfdebug;
+#endif
+
 int zconfparse(void);
 void zconfdump(FILE *out);
-
-extern int zconfdebug;
 void zconf_starthelp(void);
 FILE *zconf_fopen(const char *name);
 void zconf_initscan(const char *name);