diff --git a/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516av300_openipc_defconfig b/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516av300_openipc_defconfig
index 77bc1535..cd57aa0d 100644
--- a/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516av300_openipc_defconfig
+++ b/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516av300_openipc_defconfig
@@ -14,7 +14,7 @@ BR2_GCC_VERSION_7_X=y
 BR2_TOOLCHAIN_USES_GLIBC=y
 BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
 BR2_TOOLCHAIN_BUILDROOT_LIBC="glibc"
-# BR2_TOOLCHAIN_BUILDROOT_CXX is not set
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
 BR2_TOOLCHAIN_BUILDROOT_USE_SSP=y
 
diff --git a/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516cv500_openipc_defconfig b/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516cv500_openipc_defconfig
index 25c08e7c..d52ade14 100644
--- a/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516cv500_openipc_defconfig
+++ b/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516cv500_openipc_defconfig
@@ -14,7 +14,7 @@ BR2_GCC_VERSION_7_X=y
 BR2_TOOLCHAIN_USES_GLIBC=y
 BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
 BR2_TOOLCHAIN_BUILDROOT_LIBC="glibc"
-# BR2_TOOLCHAIN_BUILDROOT_CXX is not set
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
 BR2_TOOLCHAIN_BUILDROOT_USE_SSP=y
 
diff --git a/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516dv300_openipc_defconfig b/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516dv300_openipc_defconfig
index feedec99..51d505da 100644
--- a/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516dv300_openipc_defconfig
+++ b/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516dv300_openipc_defconfig
@@ -14,7 +14,7 @@ BR2_GCC_VERSION_7_X=y
 BR2_TOOLCHAIN_USES_GLIBC=y
 BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
 BR2_TOOLCHAIN_BUILDROOT_LIBC="glibc"
-# BR2_TOOLCHAIN_BUILDROOT_CXX is not set
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
 BR2_TOOLCHAIN_BUILDROOT_USE_SSP=y
 
diff --git a/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516ev300_glibc_defconfig b/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516ev300_glibc_defconfig
index 5c25e4c2..2970ed6c 100644
--- a/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516ev300_glibc_defconfig
+++ b/br-ext-chip-hisilicon/configs/unknown_unknown_hi3516ev300_glibc_defconfig
@@ -20,7 +20,7 @@ BR2_GCC_VERSION_7_X=y
 BR2_TOOLCHAIN_USES_GLIBC=y
 BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
 BR2_TOOLCHAIN_BUILDROOT_LIBC="glibc"
-# BR2_TOOLCHAIN_BUILDROOT_CXX is not set
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
 BR2_TOOLCHAIN_BUILDROOT_USE_SSP=y