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+# BSD LICENSE
+#
+# Copyright(c) 2010-2012 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.
+#
+# version: DPDK.L.1.2.3-3
+
+# install helper .mk
+
+#
+# generate rules to install files in RTE_OUTPUT.
+#
+# arg1: relative install dir in RTE_OUTPUT
+# arg2: relative file name in a source dir (VPATH)
+#
+define install_rule
+$(addprefix $(RTE_OUTPUT)/$(1)/,$(notdir $(2))): $(2)
+ @echo " INSTALL-FILE $(addprefix $(1)/,$(notdir $(2)))"
+ @[ -d $(RTE_OUTPUT)/$(1) ] || mkdir -p $(RTE_OUTPUT)/$(1)
+ @cp -rf $$(<) $(RTE_OUTPUT)/$(1)
+endef
+
+$(foreach dir,$(INSTALL-DIRS-y),\
+ $(foreach file,$(INSTALL-y-$(dir)),\
+ $(eval $(call install_rule,$(dir),$(file)))))
+
+
+#
+# generate rules to install symbolic links of files in RTE_OUTPUT.
+#
+# arg1: relative install dir in RTE_OUTPUT
+# arg2: relative file name in a source dir (VPATH)
+#
+define symlink_rule
+$(addprefix $(RTE_OUTPUT)/$(1)/,$(notdir $(2))): $(2)
+ @echo " SYMLINK-FILE $(addprefix $(1)/,$(notdir $(2)))"
+ @[ -d $(RTE_OUTPUT)/$(1) ] || mkdir -p $(RTE_OUTPUT)/$(1)
+ $(Q)ln -nsf `$(RTE_SDK)/scripts/relpath.sh $$(<) $(RTE_OUTPUT)/$(1)` \
+ $(RTE_OUTPUT)/$(1)
+endef
+
+$(foreach dir,$(SYMLINK-DIRS-y),\
+ $(foreach file,$(SYMLINK-y-$(dir)),\
+ $(eval $(call symlink_rule,$(dir),$(file)))))
+
+
+# fast way, no need to do preinstall and postinstall
+ifeq ($(PREINSTALL)$(POSTINSTALL),)
+
+_postinstall: $(_INSTALL)
+ @touch _postinstall
+
+else # slower way
+
+_preinstall: $(PREINSTALL)
+ @touch _preinstall
+
+ifneq ($(_INSTALL),)
+$(_INSTALL): _preinstall
+else
+_INSTALL = _preinstall
+endif
+
+_install: $(_INSTALL)
+ @touch _install
+
+ifneq ($(POSTINSTALL),)
+$(POSTINSTALL): _install
+else
+POSTINSTALL = _install
+endif
+
+_postinstall: $(POSTINSTALL)
+ @touch _postinstall
+endif