#   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.
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#       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
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#   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,
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#   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.

.PHONY: showversion
showversion:
	@set -- \
		$$(sed -rne 's,^#define RTE_VER_[A-Z_]*[[:space:]]+([0-9]+).*,\1,p' \
			-e 's,^#define RTE_VER_SUFFIX[[:space:]]+"(.*)",\1,p' \
			$(RTE_SRCDIR)/lib/librte_eal/common/include/rte_version.h) ;\
		printf '%d.%02d.%d' "$$1" "$$2" "$$3"; \
		if [ -z "$$5" ]; then echo; \
		else printf '%s' "$$4"; \
			if [ $$5 -lt 16 ] ; then echo $$5; \
			else echo $$(($$5 - 16)); fi; \
		fi

.PHONY: showversionum
showversionum:
	@set -- \
		$$(sed -rne 's,^#define RTE_VER_[A-Z_]*[[:space:]]+([0-9]+).*,\1,p' \
			$(RTE_SRCDIR)/lib/librte_eal/common/include/rte_version.h); \
		printf '%02d%02d\n' "$$1" "$$2"

INSTALL_CONFIGS := $(sort $(filter-out %~,\
	$(patsubst $(RTE_SRCDIR)/config/defconfig_%,%,\
	$(wildcard $(RTE_SRCDIR)/config/defconfig_*))))
INSTALL_TARGETS := $(addsuffix _install,$(INSTALL_CONFIGS))

.PHONY: showconfigs
showconfigs:
	@$(foreach CONFIG, $(INSTALL_CONFIGS), echo $(CONFIG);)

.PHONY: notemplate
notemplate:
	@printf "No template specified. "
	@echo "Use T=template among the following list:"
	@$(MAKE) -rR showconfigs | sed 's,^,  ,'

.PHONY: config
ifeq ($(RTE_CONFIG_TEMPLATE),)
config: notemplate
else
config: $(RTE_OUTPUT)/include/rte_config.h $(RTE_OUTPUT)/Makefile
	$(Q)$(MAKE) depdirs
	@echo "Configuration done"
endif

$(RTE_OUTPUT):
	$(Q)mkdir -p $@

ifdef NODOTCONF
$(RTE_OUTPUT)/.config: ;
else
# Generate config from template, if there are duplicates keep only the last.
# To do so the temp config is checked for duplicate keys with cut/sort/uniq
# Then for each of those identified duplicates as long as there are more than
# just one left the last match is removed.
$(RTE_OUTPUT)/.config: $(RTE_CONFIG_TEMPLATE) FORCE | $(RTE_OUTPUT)
	$(Q)if [ "$(RTE_CONFIG_TEMPLATE)" != "" -a -f "$(RTE_CONFIG_TEMPLATE)" ]; then \
		$(CPP) -undef -P -x assembler-with-cpp \
		-ffreestanding \
		-o $(RTE_OUTPUT)/.config_tmp $(RTE_CONFIG_TEMPLATE) ; \
		config=$$(cat $(RTE_OUTPUT)/.config_tmp) ; \
		echo "$$config" | awk -F '=' 'BEGIN {i=1} \
			/^#/ {pos[i++]=$$0} \
			!/^#/ {if (!s[$$1]) {pos[i]=$$0; s[$$1]=i++} \
				else {pos[s[$$1]]=$$0}} END \
			{for (j=1; j<i; j++) print pos[j]}' \
			> $(RTE_OUTPUT)/.config_tmp ; \
		if ! cmp -s $(RTE_OUTPUT)/.config_tmp $(RTE_OUTPUT)/.config; then \
			cp $(RTE_OUTPUT)/.config_tmp $(RTE_OUTPUT)/.config ; \
			cp $(RTE_OUTPUT)/.config_tmp $(RTE_OUTPUT)/.config.orig ; \
		fi ; \
		rm -f $(RTE_OUTPUT)/.config_tmp ; \
	else \
		$(MAKE) -rRf $(RTE_SDK)/mk/rte.sdkconfig.mk notemplate; \
	fi
endif

# generate a Makefile for this build directory
# use a relative path so it will continue to work even if we move the directory
SDK_RELPATH=$(shell $(RTE_SDK)/scripts/relpath.sh $(abspath $(RTE_SRCDIR)) \
				$(abspath $(RTE_OUTPUT)))
OUTPUT_RELPATH=$(shell $(RTE_SDK)/scripts/relpath.sh $(abspath $(RTE_OUTPUT)) \
				$(abspath $(RTE_SRCDIR)))
$(RTE_OUTPUT)/Makefile: | $(RTE_OUTPUT)
	$(Q)$(RTE_SDK)/scripts/gen-build-mk.sh $(SDK_RELPATH) $(OUTPUT_RELPATH) \
		> $(RTE_OUTPUT)/Makefile

# clean installed files, and generate a new config header file
# if NODOTCONF variable is defined, don't try to rebuild .config
$(RTE_OUTPUT)/include/rte_config.h: $(RTE_OUTPUT)/.config
	$(Q)rm -rf $(RTE_OUTPUT)/include $(RTE_OUTPUT)/app \
		$(RTE_OUTPUT)/lib \
		$(RTE_OUTPUT)/hostlib $(RTE_OUTPUT)/kmod $(RTE_OUTPUT)/build
	$(Q)mkdir -p $(RTE_OUTPUT)/include
	$(Q)$(RTE_SDK)/scripts/gen-config-h.sh $(RTE_OUTPUT)/.config \
		> $(RTE_OUTPUT)/include/rte_config.h

# generate the rte_config.h
.PHONY: headerconfig
headerconfig: $(RTE_OUTPUT)/include/rte_config.h
	@true

# check that .config is present, and if yes, check that rte_config.h
# is up to date
.PHONY: checkconfig
checkconfig:
	@if [ ! -f $(RTE_OUTPUT)/.config ]; then \
		echo "No .config in build directory"; \
		exit 1; \
	fi
	$(Q)$(MAKE) -f $(RTE_SDK)/mk/rte.sdkconfig.mk \
		headerconfig NODOTCONF=1
	$(Q)$(MAKE) -s depdirs

.PHONY: FORCE
FORCE: