From c1e5ba4602fe6a18f2443dd803b64fcfb20d7254 Mon Sep 17 00:00:00 2001
From: Xiang Xiao <xiaoxiang@xiaomi.com>
Date: Sat, 30 Apr 2022 03:41:01 +0800
Subject: [PATCH] libxx: Always build libcxx with -std=c++17

since the implementation of barrier require
the aligned new which is defined in C++ 17

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
---
 libs/libxx/libcxx.defs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/libxx/libcxx.defs b/libs/libxx/libcxx.defs
index 8ce3667c8e6..c79a5eb82c8 100644
--- a/libs/libxx/libcxx.defs
+++ b/libs/libxx/libcxx.defs
@@ -45,7 +45,7 @@ distclean::
 	$(Q) $(DIRUNLINK) $(TOPDIR)/include/libcxx
 	$(call DELDIR, libcxx)
 
-CXXFLAGS += ${shell $(DEFINE) "$(CC)" _LIBCPP_BUILDING_LIBRARY}
+CXXFLAGS += -std=c++17 ${shell $(DEFINE) "$(CC)" _LIBCPP_BUILDING_LIBRARY}
 
 ifeq ($(CONFIG_LIBSUPCXX), y)
 CXXFLAGS += ${shell $(DEFINE) "$(CC)" __GLIBCXX__}