diff --git a/sdk_container/src/third_party/portage-stable/eclass/toolchain-funcs.eclass b/sdk_container/src/third_party/portage-stable/eclass/toolchain-funcs.eclass
index 8398ee004a..4559894ca0 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/toolchain-funcs.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/toolchain-funcs.eclass
@@ -648,6 +648,7 @@ tc-ninja_magic_to_arch() {
 	case ${host} in
 		aarch64*)	echo arm64;;
 		alpha*)		echo alpha;;
+		arc*)		echo arc;;
 		arm*)		echo arm;;
 		avr*)		_tc_echo_kernel_alias avr32 avr;;
 		bfin*)		_tc_echo_kernel_alias blackfin bfin;;
@@ -736,6 +737,8 @@ tc-endian() {
 		aarch64*be)	echo big;;
 		aarch64)	echo little;;
 		alpha*)		echo little;;
+		arc*b*)		echo big;;
+		arc*)		echo little;;
 		arm*b*)		echo big;;
 		arm*)		echo little;;
 		cris*)		echo little;;