HOST_ARCH?=$(shell uname -p)
TARGET_ARCH?=$(shell uname -p)
BUILD_TYPE?=Debug
CROSS_BUILD?=0
HOST_OS?=linux
TARGET_OS?=linux
PARALLEL_BUILD?=1
## TODO: fix obs build break
OBS_BUILD?=OFF
COVERAGE_BUILD?=0
BENCHMARK_ACL_BUILD?=0
OPTIONS?=
GENERATE_NNAPI_TESTS?=1
TFLITE_MAJOR_VER?=1
TFLITE_MINOR_VER?=13

# make TARGET and TYPE to lowercase
HOST_ARCH_LC=$(shell echo $(HOST_ARCH) | tr A-Z a-z)
TARGET_ARCH_LC=$(shell echo $(TARGET_ARCH) | tr A-Z a-z)
BUILD_TYPE_LC=$(shell echo $(BUILD_TYPE) | tr A-Z a-z)
# we need base name 'arm` for all arm arch
TARGET_ARCH_BASE=$(TARGET_ARCH_LC)
ifneq (,$(findstring arm64,$(TARGET_ARCH_BASE)))
	# arm64 as target-arch comes from Android
	TARGET_ARCH_BASE=arm64
	# For now Android is the only option for arm64
	TARGET_OS:=android
else ifneq (,$(findstring arm,$(TARGET_ARCH_BASE)))
	TARGET_ARCH_BASE=arm
else ifneq (,$(findstring aarch64,$(TARGET_ARCH_BASE)))
	# aarch64 as target-arch comes from all except for Android
	TARGET_ARCH_BASE=aarch64
endif
# Set CROSS_BUILD=1 when ROOTFS_DIR is given, and TARGET_ARCH is different to HOST_ARCH.
ifneq ($(ROOTFS_DIR),)
ifneq ($(TARGET_ARCH_LC),$(HOST_ARCH_LC))
  CROSS_BUILD=$(if $(wildcard $(ROOTFS_DIR)),1,0)
endif
endif
# the toolchain file, only for cross build
ifeq ($(CROSS_BUILD),1)
	TOOLCHAIN_FILE=cmake/buildtool/cross/toolchain_$(TARGET_ARCH_LC)-$(TARGET_OS).cmake
	OPTIONS+= -DCMAKE_TOOLCHAIN_FILE=$(TOOLCHAIN_FILE)
endif

ifeq ($(COVERAGE_BUILD),1)
	OPTIONS+= -DENABLE_COVERAGE=ON
else
	OPTIONS+= -DENABLE_COVERAGE=OFF
endif

ifeq ($(BENCHMARK_ACL_BUILD),1)
	OPTIONS+= -DBUILD_BENCHMARK_ACL=1
endif

ifneq ($(EXT_ACL_FOLDER),)
	OPTIONS+= -DBUILD_ARMCOMPUTE=OFF
	OPTIONS+= -DARMCompute_EXTDIR=$(EXT_ACL_FOLDER)
endif

ifneq ($(EXTERNAL_VOLUME),)
	OPTIONS+= -DNNFW_EXTERNALS_DIR=$(EXTERNAL_VOLUME)
endif

ifneq ($(OBS_BUILD),OFF)
	# Use pre-installed google test library
	OPTIONS+= -DBUILD_GTEST=FALSE
	OPTIONS+= -DBUILD_ARMCOMPUTE=FALSE
	OPTIONS+= -DDOWNLOAD_ARMCOMPUTE=FALSE
	OPTIONS+= -DDOWNLOAD_TENSORFLOW=FALSE
	# Use pre-installed tensorflow lite library
	OPTIONS+= -DBUILD_TENSORFLOW_LITE=FALSE
	# Disable logging runtime build for Tizen
	OPTIONS+= -DBUILD_LOGGING=FALSE
	OPTIONS+= -DBUILD_TOOLS=FALSE
	# Disable "tflite-run" and "tflite_benchmark_model" for Tizen
	OPTIONS+= -DBUILD_TFLITE_RUN=FALSE
	OPTIONS+= -DBUILD_TFLITE_BENCHMARK_MODEL=FALSE
endif

ifeq ($(GENERATE_NNAPI_TESTS),1)
	OPTIONS+= -DGENERATE_RUNTIME_NNAPI_TESTS=ON
endif

ifeq ($(PARALLEL_BUILD),1)
	# Get number of processors (linux only for now)
	ifeq ($(HOST_OS),linux)
		NPROCS?=$(shell grep -c ^processor /proc/cpuinfo)
	endif
endif

NPROCS?=1
WORKHOME=Product
WORKFOLDER=$(TARGET_ARCH_LC)-$(TARGET_OS).$(BUILD_TYPE_LC)
WORKDIR=$(WORKHOME)/$(WORKFOLDER)

BUILD_ROOT=$(WORKDIR)/obj
INSTALL_ROOT=$(WORKDIR)/out

BUILD_FOLDER=$(WORKFOLDER)/obj
INSTALL_FOLDER=$(WORKFOLDER)/out
BUILD_ALIAS=$(WORKHOME)/obj
INSTALL_ALIAS=$(WORKHOME)/out

INSTALL_PATH?=$(CURDIR)/$(WORKDIR)/out

TIMESTAMP_CONFIGURE=$(WORKDIR)/CONFIGURE
TIMESTAMP_BUILD=$(WORKDIR)/BUILD
TIMESTAMP_INSTALL=$(WORKDIR)/INSTALL

all: build

###
### Command (public)
###
configure: configure_internal

build: build_internal

install: $(TIMESTAMP_INSTALL)

clean:
	rm -rf $(WORKDIR)

distclean:
	rm -rf $(WORKDIR)
	rm -rf externals/*.stamp
	rm -rf tests/nnapi/src/generated/

###
### Command (internal)
###
configure_internal:
	NNFW_BUILD_DIR="$(CURDIR)/$(BUILD_ROOT)" NNFW_INSTALL_PREFIX=$(INSTALL_PATH) ./nnfw configure \
		-DCMAKE_BUILD_TYPE=$(BUILD_TYPE_LC) -DTARGET_ARCH=$(TARGET_ARCH_LC) \
		-DHOST_OS=$(HOST_OS) \
		-DTARGET_OS=$(TARGET_OS) \
		-DTFLITE_MAJOR_VER=$(TFLITE_MAJOR_VER) \
		-DTFLITE_MINOR_VER=$(TFLITE_MINOR_VER) \
		$(OPTIONS)
	touch $(TIMESTAMP_CONFIGURE)

build_internal: $(BUILD_ROOT)
	cd $(BUILD_ROOT) && make -j $(NPROCS) all
	rm -rf $(BUILD_ALIAS)
	ln -s $(BUILD_FOLDER) $(BUILD_ALIAS)
	touch $(TIMESTAMP_BUILD)

install_internal:
	cd $(BUILD_ROOT) && make install
	rm -rf $(INSTALL_ALIAS)
	ln -s $(INSTALL_FOLDER) $(INSTALL_ALIAS)
	touch $(TIMESTAMP_INSTALL)

build_test_suite: install_internal
	@echo "packaging test suite"
	@rm -rf $(INSTALL_ROOT)/test-suite.tar.gz
	@tar -zcf test-suite.tar.gz tests/scripts tests/framework infra $(INSTALL_ALIAS) --dereference
	@mv test-suite.tar.gz $(INSTALL_ROOT)/.

build_coverage_suite: install_internal
	@echo "packaging test-coverage suite"
	@rm -rf $(INSTALL_ROOT)/coverage-suite.tar.gz
	@find Product -name "*.gcno" > include_lists.txt
	@pwd | grep -o '/' | wc -l > tests/scripts/build_path_depth.txt
	@tar -zcf coverage-suite.tar.gz tests/scripts tests/framework tools/lcov-to-cobertura-xml \
		nnas nnfw infra runtimes $(INSTALL_ALIAS) --dereference -T include_lists.txt
	@rm -rf include_lists.txt tests/scripts/build_path_depth.txt
	@mv coverage-suite.tar.gz $(INSTALL_ROOT)/.

###
### Timestamps
###
$(WORKDIR):
	mkdir -p $@

$(BUILD_ROOT): $(WORKDIR) configure_internal

$(TIMESTAMP_CONFIGURE): configure_internal

$(TIMESTAMP_BUILD): $(TIMESTAMP_CONFIGURE) build_internal

$(TIMESTAMP_INSTALL): $(TIMESTAMP_BUILD) install_internal