--- /dev/null
+#
+# Copyright 2017 Sandvine
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+SUBDIRS_CLEAN = $(addsuffix .clean, $(SUBDIRS))
+
+.PHONY: $(SUBDIRS) $(SUBDIRS_CLEAN) clean
+
+all: $(SUBDIRS)
+
+clean: $(SUBDIRS_CLEAN)
+
+$(SUBDIRS_CLEAN): %.clean:
+ @$(MAKE) --no-print-directory -C $* clean
+
+$(SUBDIRS):
+ @$(MAKE) --no-print-directory -C $@