CFLAGS  = -W -Wall -Wextra -Werror -Wundef -Wshadow -Wdouble-promotion
CFLAGS += -Wformat-truncation -fno-common # -Wconversion is not SDK-friendly
CFLAGS += -g3 -Os -ffunction-sections -fdata-sections
CFLAGS += -I. -Icmsis_core/CMSIS/Core/Include -Icmsis_n94/devices/MCXN947/
CFLAGS += -Icmsis_n94/devices/MCXN947/drivers
CFLAGS += -DCPU_MCXN947VDF -DCPU_MCXN947VDF_cm33 -DCPU_MCXN947VDF_cm33_core0
CFLAGS += -mcpu=cortex-m33 -mthumb -mfloat-abi=hard -mfpu=fpv5-d16 $(CFLAGS_EXTRA)
LDSCRIPT = link.ld
LDFLAGS ?= -T$(LDSCRIPT) -nostdlib -nostartfiles --specs nano.specs -lc -lgcc -Wl,--gc-sections -Wl,-Map=$@.map 

SOURCES = main.c hal.c
SOURCES += startup.c
CFLAGS += -D__ATOLLIC__ -D__STARTUP_CLEAR_BSS	# Make startup code work as expected

# Mongoose options are defined in mongoose_custom.h
#SOURCES += mongoose.c packed_fs.c

# Example specific build options. See README.md
CFLAGS += -DHTTP_URL=\"http://0.0.0.0/\" -DHTTPS_URL=\"https://0.0.0.0/\"

ifeq ($(OS),Windows_NT)
  RM = cmd /C del /Q /F /S
else
  RM = rm -rf
endif

all build example: firmware.bin

firmware.bin: firmware.elf
	arm-none-eabi-objcopy -O binary $< $@

firmware.elf: cmsis_core cmsis_n94 $(SOURCES) hal.h link.ld Makefile
	arm-none-eabi-gcc $(SOURCES) $(CFLAGS) $(LDFLAGS) -o $@
	arm-none-eabi-size $@

cmsis_core:     # ARM CMSIS core headers
	git clone -q --depth 1 -b 5.9.0 https://github.com/ARM-software/CMSIS_5 $@
cmsis_n94:
	wget -O $@.zip https://mcuxpresso.nxp.com/cmsis_pack/repo/NXP.MCXN947_DFP.17.0.0.pack
	mkdir $@ && cd $@ && unzip -q ../$@.zip
clean:
	$(RM) firmware.* *.su cmsis_core cmsis_n94 *.zip