# Copyright JS Foundation and other contributors, http://js.foundation
#
# 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.

.DEFAULT_GOAL := all

ifeq ($(.DEFAULT_GOAL),)
  $(warning no default goal is set)
endif

BOARD ?= qemu_x86
CONF_FILE = prj.conf
export BOARD

TARGET_ZEPHYR ?= ./targets/zephyr
TARGET_ZEPHYR_SRC_DIR = $(TARGET_ZEPHYR)/src

COMPONENTS  ?= jerry-core jerry-ext
JERRYHEAP ?= 16
JERRYPROFILE ?= minimal

# Include functionality like regular expressions
# check Jerry script documentation
#
# -cp
# -cp_minimal
# -cp_minimal-mem_stats
# -mem_stats
# -mem_stress_test

ifndef ZEPHYR_BASE
$(error Missing Zephyr base, did you source zephyr-env.sh? )
endif

INTERM     = build/$(BOARD)/obj
OUTPUT     = build/$(BOARD)/zephyr

include $(OUTPUT)/Makefile.export

EXT_CFLAGS := -fno-asynchronous-unwind-tables -fno-omit-frame-pointer
EXT_CFLAGS += -fno-stack-protector -fno-strict-overflow -ffreestanding
EXT_CFLAGS += -fno-reorder-functions -fno-defer-pop -fdata-sections
EXT_CFLAGS += -ffunction-sections -fno-inline-functions

EXT_CFLAGS += $(KBUILD_CFLAGS) $(NOSTDINC_FLAGS) $(subst -I,-isystem,$(ZEPHYRINCLUDE))

EXT_CFLAGS += -Wall -Wno-format-zero-length -Wno-pointer-sign
EXT_CFLAGS += -Werror=format -Werror=implicit-int -Wno-unused-but-set-variable
EXT_CFLAGS += -Wno-main -Wno-strict-aliasing -Wno-old-style-declaration
EXT_CFLAGS += -Wno-error=format=
EXT_CFLAGS += -D_XOPEN_SOURCE=700

EXT_CFLAGS += -Wno-error=conversion

EXTERNAL_LIB = $(INTERM)/lib/libjerry-core.a $(INTERM)/lib/libjerry-ext.a

LIBS = jerry-core jerry-ext

BUILD_CONFIG = O="$(OUTPUT)" V=$(V) USER_LIBS="$(LIBS)" USER_LIB_INCLUDE_DIR="-L $(CURDIR)/$(INTERM)/lib" TARGET_ZEPHYR=$(TARGET_ZEPHYR)

.PHONY: all
all: zephyr

$(EXTERNAL_LIB):
ifdef V
	@echo "- JERRY SCRIPT -------------------------------------------------"
endif
	mkdir -p $(INTERM)
	mkdir -p $(OUTPUT)
	cmake -B$(INTERM) -H./ \
	 -DCMAKE_SYSTEM_NAME=Zephyr \
	 -DCMAKE_C_COMPILER="$(subst ccache ,,$(CC))" \
	 -DCMAKE_C_COMPILER_WORKS=TRUE \
	 -DENABLE_LTO=OFF \
	 -DJERRY_CMDLINE=OFF \
	 -DJERRY_PROFILE=$(JERRYPROFILE) \
	 -DJERRY_ERROR_MESSAGES=ON \
	 -DCMAKE_BUILD_TYPE=MinSizeRel \
	 -DCMAKE_VERBOSE_MAKEFILE=$(V) \
	 -DJERRY_GLOBAL_HEAP_SIZE=$(JERRYHEAP) \
	 -DEXTERNAL_COMPILE_FLAGS="$(EXT_CFLAGS)" \
	 $(EXT_JERRY_FLAGS)

	make -C $(INTERM) $(COMPONENTS) V=1

$(OUTPUT)/Makefile.export: $(OUTPUT)/Makefile
	make --no-print-directory -C $(OUTPUT) outputexports CMAKE_COMMAND=: >$@

$(OUTPUT)/Makefile:
	mkdir -p $(OUTPUT) && cmake -DBOARD=$(BOARD) -DCONF_FILE=$(CONF_FILE) -B$(OUTPUT) -Htargets/zephyr/

zephyr: jerry
ifdef V
	@echo "- ZEPHYR -------------------------------------------------------"
endif
	+make -C $(OUTPUT)
	@echo "Finished"
	@size $(OUTPUT)/zephyr/zephyr.elf

jerry: $(EXTERNAL_LIB)
	@touch $(EXTERNAL_LIB)

GENERIC_TARGETS = run qemugdb flash debug debugserver
KCONFIG_TARGETS = \
	initconfig config nconfig menuconfig xconfig gconfig \
	oldconfig silentoldconfig defconfig savedefconfig \
	allnoconfig allyesconfig alldefconfig randconfig \
	listnewconfig olddefconfig
CLEAN_TARGETS = mrproper

$(GENERIC_TARGETS): jerry
$(CLEAN_TARGETS): clean

$(GENERIC_TARGETS) $(KCONFIG_TARGETS) $(CLEAN_TARGETS):
ifdef V
	@echo "- ZEPHYR -------------------------------------------------------"
endif
	make -C $(OUTPUT) $@

dfu-x86: all
	@- dfu-util -a x86_app -D build/$(BOARD)/zephyr/zephyr.bin; \
	if [ $$? -eq 0 ] ; then echo "\nYour program will launch in 5 seconds." ; \
	else echo "\nProgram didn't flash, try pressing the reset buttons \nand wait a second for the bootloader to load, \nor flash again the factory bootloader."; fi

usage:
help:
	@echo Usage:
	@echo showconfig	 Show parameters and configuration
	@echo flash	         Flash into board
	@echo all	         Compile jerryscript and zephyr

showconfig:
	@echo "- CONFIGURATION ------------------------------------------------"
	@echo "INTERM           = $(INTERM)"
	@echo "OUTPUT           = $(OUTPUT)"
	@echo "CC               = $(CC) "
	@echo "BOARD            = $(ZEPHYR_BASE)/boards/$(BOARD)/Makefile.board "
	@echo "TOOLCHAIN        = $(ZEPHYR_BASE)/scripts/Makefile.toolchain.$(ZEPHYR_GCC_VARIANT) "
	@echo "TOOLCHAIN_CFLAGS = $(TOOLCHAIN_CFLAGS) "
	@echo "CROSS_COMPILE    = $(CROSS_COMPILE) "
	@echo "TOOLCHAIN_LIBS   = $(TOOLCHAIN_LIBS) "
	@echo "LIBS             = $(LIBS) "
	@echo "BUILD_CONFIG     = $(BUILD_CONFIG) "
	make -f $(TARGET_ZEPHYR)/Makefile $(BUILD_CONFIG) showconfig

clean:
ifdef V
	@echo "- CLEANING JERRY SCRIPT ----------------------------------------"
endif
	rm -rf $(INTERM) $(TARGET_ZEPHYR_SRC_DIR)/*.o
ifdef V
	@echo "- CLEANING ZEPHYR ----------------------------------------------"
endif
	make -f $(TARGET_ZEPHYR)/Makefile $(BUILD_CONFIG) clean

pristine: clean
ifdef V
	@echo "- CLEANING BUILD DIRECTORY -------------------------------------"
endif
	rm -rf build/
