CC = arm-none-eabi-gcc
LD = arm-none-eabi-g++
CXX = arm-none-eabi-g++
OBJCOPY = arm-none-eabi-objcopy

linker_script = bootloader.ld
includes = 
sources =

CFLAGS = -march=armv6-m -g -ffunction-sections -fdata-sections -Os -Werror -Wall -flto
CXXFLAGS = $(CFLAGS) -std=c++20 -fno-exceptions -fcoroutines
CPPFLAGS = -MD -MP
LDFLAGS = -march=armv6-m \
		  -g --specs=nano.specs --specs=nosys.specs \
		  -Wl,--gc-sections -Os \
		  -Wl,--print-memory-usage -flto

includes += -Ihal/cmsis

sources += hal/lib/common/xil_assert.c
includes += -Ihal/lib/common

sources += hal/uart/xuartlite.c hal/uart/xuartlite_stats.c hal/uart/xuartlite_intr.c
includes += -Ihal/uart

bootloader_objects = uart.o bootloader.o vector_table.o $(sources:.c=.o)
app_objects = app_init.o crash.o main.o uart.o stdlib.o async.o trace.o $(sources:.c=.o)

CPPFLAGS += $(includes)

all: bootloader.elf app.bin

%.bin: %.elf
	$(OBJCOPY) -O binary $< $@

bootloader.elf: $(bootloader_objects) bootloader.ld
	$(LD) -Wl,-Tbootloader.ld $(LDFLAGS) -o $@ $(bootloader_objects)

app.elf: $(app_objects) app.ld
	$(LD) -Wl,-Tapp.ld $(LDFLAGS) -o $@ $(app_objects)

.PHONY: clean test

deps = $(app_objects:.o=.d) $(bootloader_objects:.o=.d)

clean:
	rm -rf *.elf *.bin $(tests) $(app_objects) $(bootloader_objects) $(deps)

HOSTCXX = clang++

tests = ring_buffer_test

test: $(tests)

ring_buffer_test: ring_buffer_test.cc
	$(HOSTCXX) -std=c++2a -o $@ $< -lgmock -lgtest -lgtest_main
	./$@

-include $(deps)