diff --git a/libs/libxx/__config_site b/libs/libxx/__config_site
index 8843326f8a8d3..a151662f449f0 100644
--- a/libs/libxx/__config_site
+++ b/libs/libxx/__config_site
@@ -38,6 +38,9 @@
 #define _LIBCPP_ENABLE_HARDENED_MODE_DEFAULT 0
 #define _LIBCPP_ENABLE_DEBUG_MODE_DEFAULT 0
 
+#define _LIBCPP_DISABLE_DEPRECATION_WARNINGS 1
+#define _LIBCPP_AVAILABILITY_HAS_NO_VERBOSE_ABORT 1
+
 // __USE_MINGW_ANSI_STDIO gets redefined on MinGW
 #ifdef __clang__
 #  pragma clang diagnostic push