From bf6606f80cb697e63ca16c22ccde3bc2093d366e Mon Sep 17 00:00:00 2001
From: SPRESENSE <41312067+SPRESENSE@users.noreply.github.com>
Date: Thu, 5 Oct 2023 10:53:28 +0900
Subject: [PATCH] libxx: Use gnu++20 option only if using libcxx

Fix an issue that gnu++20 option is always used.
Essentially, when cxx is not used, gnu++17 should be retained.
---
 libs/libxx/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libs/libxx/Kconfig b/libs/libxx/Kconfig
index 2bc325d1af..87c8689e96 100644
--- a/libs/libxx/Kconfig
+++ b/libs/libxx/Kconfig
@@ -90,7 +90,8 @@ endif
 
 config CXX_STANDARD
 	string "Language standard"
-	default "gnu++20"
+	default "gnu++20" if LIBCXX
+	default "gnu++17" if !LIBCXX
 	---help---
 		Possible values:
 		gnu++98/c++98, gnu++11/c++11, gnu++14/c++14, gnu++17/c++17 and gnu++20/c++20