[PATCH] scripts/tags.sh: Fix the Kconfig tags generation when using latest ctags

[Kevin Hao <haokexin@gmail.com>]

The Kconfig language has already been built-in in the latest ctags, so
it would error exit if we try to define it as an user-defined language
via '--langdef=kconfig'. This results that there is no Kconfig tags in
the final tag file. Fix this by skipping the user Kconfig definition for
the latest ctags.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
---
 scripts/tags.sh | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/scripts/tags.sh b/scripts/tags.sh
index e137cf15aae9..c56b13ae3fdf 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -264,10 +264,12 @@ exuberant()
 	--$CTAGS_EXTRA=+fq --c-kinds=+px --fields=+iaS --langmap=c:+.h \
 	"${regex[@]}"
 
-	setup_regex exuberant kconfig
-	all_kconfigs | xargs $1 -a                              \
-	--langdef=kconfig --language-force=kconfig "${regex[@]}"
-
+	KCONFIG_ARGS=""
+	if ! $1 --list-languages | grep -iq kconfig; then
+		setup_regex exuberant kconfig
+		KCONFIG_ARGS="--langdef=kconfig --language-force=kconfig ${regex[@]}"
+	fi
+	all_kconfigs | xargs $1 -a $KCONFIG_ARGS
 }
 
 emacs()
-- 
2.38.1