diff --git a/toolchain/toolchain-external/toolchain-external.mk b/toolchain/toolchain-external/toolchain-external.mk
index ff4ae5e219..66ba23ad9b 100644
--- a/toolchain/toolchain-external/toolchain-external.mk
+++ b/toolchain/toolchain-external/toolchain-external.mk
@@ -617,12 +617,7 @@ endef
 #                       to the target filesystem.
 
 define TOOLCHAIN_EXTERNAL_INSTALL_TARGET_LIBS
-	$(Q)SYSROOT_DIR="$(call toolchain_find_sysroot,$(TOOLCHAIN_EXTERNAL_CC))" ; \
-	if test -z "$${SYSROOT_DIR}" ; then \
-		@echo "External toolchain doesn't support --sysroot. Cannot use." ; \
-		exit 1 ; \
-	fi ; \
-	ARCH_SYSROOT_DIR="$(call toolchain_find_sysroot,$(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS))" ; \
+	$(Q)ARCH_SYSROOT_DIR="$(call toolchain_find_sysroot,$(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS))" ; \
 	ARCH_LIB_DIR="$(call toolchain_find_libdir,$(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS))" ; \
 	SUPPORT_LIB_DIR="" ; \
 	if test `find $${ARCH_SYSROOT_DIR} -name 'libstdc++.a' | wc -l` -eq 0 ; then \
@@ -631,7 +626,6 @@ define TOOLCHAIN_EXTERNAL_INSTALL_TARGET_LIBS
 			SUPPORT_LIB_DIR=`readlink -f $${LIBSTDCPP_A_LOCATION} | sed -r -e 's:libstdc\+\+\.a::'` ; \
 		fi ; \
 	fi ; \
-	ARCH_SUBDIR=`echo $${ARCH_SYSROOT_DIR} | sed -r -e "s:^$${SYSROOT_DIR}(.*)/$$:\1:"` ; \
 	if test -z "$(BR2_STATIC_LIBS)" ; then \
 		$(call MESSAGE,"Copying external toolchain libraries to target...") ; \
 		for libs in $(LIB_EXTERNAL_LIBS); do \