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diff --git a/mk/rte.subdir.mk b/mk/rte.subdir.mk
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+#   BSD LICENSE
+#
+#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#
+# .mk to build subdirectories
+#
+
+include $(RTE_SDK)/mk/internal/rte.install-pre.mk
+include $(RTE_SDK)/mk/internal/rte.clean-pre.mk
+include $(RTE_SDK)/mk/internal/rte.build-pre.mk
+
+CLEANDIRS = $(addsuffix _clean,$(DIRS-y) $(DIRS-n) $(DIRS-))
+
+VPATH += $(SRCDIR)
+_BUILD = $(DIRS-y)
+_INSTALL = $(INSTALL-FILES-y) $(SYMLINK-FILES-y)
+_CLEAN = $(CLEANDIRS)
+
+.PHONY: all
+all: install
+
+.PHONY: install
+install: build _postinstall
+
+_postinstall: build
+
+.PHONY: build
+build: _postbuild
+
+.SECONDEXPANSION:
+.PHONY: $(DIRS-y)
+$(DIRS-y):
+	@[ -d $(CURDIR)/$@ ] || mkdir -p $(CURDIR)/$@
+	@echo "== Build $S/$@"
+	@$(MAKE) S=$S/$@ -f $(SRCDIR)/$@/Makefile -C $(CURDIR)/$@ all
+
+.PHONY: clean
+clean: _postclean
+
+%_clean:
+	@echo "== Clean $S/$*"
+	@if [ -f $(SRCDIR)/$*/Makefile -a -d $(CURDIR)/$* ]; then \
+		$(MAKE) S=$S/$* -f $(SRCDIR)/$*/Makefile -C $(CURDIR)/$* clean ; \
+	fi
+	@rm -f $(_BUILD_TARGETS) $(_INSTALL_TARGETS) $(_CLEAN_TARGETS)
+
+#
+# include .depdirs and define rules to order priorities between build
+# of directories.
+#
+include $(RTE_OUTPUT)/.depdirs
+
+define depdirs_rule
+$(1): $(sort $(patsubst $(S)/%,%,$(LOCAL_DEPDIRS-$(S)/$(1))))
+endef
+
+$(foreach d,$(DIRS-y),$(eval $(call depdirs_rule,$(d))))
+
+
+# use a "for" in a shell to process dependencies: we don't want this
+# task to be run in parallel.
+.PHONY: depdirs
+depdirs:
+	@for d in $(DIRS-y); do \
+		if [ -f $(SRCDIR)/$$d/Makefile ]; then \
+			$(MAKE) S=$S/$$d -f $(SRCDIR)/$$d/Makefile depdirs ; \
+		fi ; \
+	done
+
+.PHONY: depgraph
+depgraph:
+	@for d in $(DIRS-y); do \
+		echo "    \"$(S)\" -> \"$(S)/$$d\"" ; \
+		if [ -f $(SRCDIR)/$$d/Makefile ]; then \
+			$(MAKE) S=$S/$$d -f $(SRCDIR)/$$d/Makefile depgraph ; \
+		fi ; \
+	done
+
+include $(RTE_SDK)/mk/internal/rte.install-post.mk
+include $(RTE_SDK)/mk/internal/rte.clean-post.mk
+include $(RTE_SDK)/mk/internal/rte.build-post.mk
+
+.PHONY: FORCE
+FORCE: