diff --git a/br-ext-chip-xiongmai/configs/unknown_unknown_xm510_openipc_defconfig b/br-ext-chip-xiongmai/configs/unknown_unknown_xm510_openipc_defconfig
index 51d4dc40..9544e2a7 100644
--- a/br-ext-chip-xiongmai/configs/unknown_unknown_xm510_openipc_defconfig
+++ b/br-ext-chip-xiongmai/configs/unknown_unknown_xm510_openipc_defconfig
@@ -15,7 +15,7 @@ BR2_GCC_VERSION_7_X=y
 BR2_TOOLCHAIN_USES_MUSL=y
 BR2_TOOLCHAIN_BUILDROOT_MUSL=y
 BR2_TOOLCHAIN_BUILDROOT_LIBC="musl"
-# 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-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig b/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig
index 03b498bb..7c84164f 100644
--- a/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig
+++ b/br-ext-chip-xiongmai/configs/unknown_unknown_xm530_openipc_defconfig
@@ -15,7 +15,7 @@ BR2_GCC_VERSION_7_X=y
 BR2_TOOLCHAIN_USES_MUSL=y
 BR2_TOOLCHAIN_BUILDROOT_MUSL=y
 BR2_TOOLCHAIN_BUILDROOT_LIBC="musl"
-# 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-xiongmai/configs/unknown_unknown_xm550_openipc_defconfig b/br-ext-chip-xiongmai/configs/unknown_unknown_xm550_openipc_defconfig
index a62944ef..4c2b503f 100644
--- a/br-ext-chip-xiongmai/configs/unknown_unknown_xm550_openipc_defconfig
+++ b/br-ext-chip-xiongmai/configs/unknown_unknown_xm550_openipc_defconfig
@@ -15,7 +15,7 @@ BR2_GCC_VERSION_7_X=y
 BR2_TOOLCHAIN_USES_MUSL=y
 BR2_TOOLCHAIN_BUILDROOT_MUSL=y
 BR2_TOOLCHAIN_BUILDROOT_LIBC="musl"
-# BR2_TOOLCHAIN_BUILDROOT_CXX is not set
+BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
 BR2_TOOLCHAIN_BUILDROOT_USE_SSP=y