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.
SPRESENSE · Oct 5, 2023 · 15d704c · 15d704c
1 parent 2e93882
commit 15d704c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git 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