dev-image = 5150-dev

%.bin: %.asm
	nasm $< -o $@

crc16.s: crc16.c
	ia16-elf-gcc -S -Os -o crc16.s crc16.c

crc16.bin: crc16.s
	ia16-elf-gcc -o crc16.bin -Os -nostdlib crc16.s

CC = ia16-elf-gcc
CXX = ia16-elf-gcc
LD = ia16-elf-gcc
CXXFLAGS = -mregparmcall -ffunction-sections -Os -flto
CFLAGS = -mregparmcall -ffunction-sections -Os -flto
LDFLAGS = -mregparmcall -Wl,--gc-sections -Os -nostdlib -flto

%.elf:
	$(LD) $(LDFLAGS) $(CPPFLAGS) -o $@ $^

%.com: %.elf
	ia16-elf-objcopy -O binary $< $@

bootsectors = fat12boot.bin wozmon.bin
$(bootsectors):
	ia16-elf-objcopy -O binary $< $@

fat12boot.elf: fat12boot.o fat12.o bootsect.S
fat12boot.elf: LDFLAGS += -T bootsect.ld

fat12boot.bin: fat12boot.elf

polmon.elf: LDFLAGS += -T flat1000.ld
polmon.elf: polmon.o stdlib.o

polio.elf: LDFLAGS += -T flat0600.ld
polio.elf: polio-main.o polio.s fat12.o paracomm.o

wozmon.o: polmon.cc
wozmon.o: CPPFLAGS = -DWOZMON=1
wozmon.o:
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -c -o $@ $<

wozmon.elf: wozmon.o bootsect.S
wozmon.elf: LDFLAGS += -T bootsect.ld
wozmon.elf: CPPFLAGS += -DNOBPB

wozmon.bin: wozmon.elf

paracli.elf: LDFLAGS += -T doscom.ld
paracli.elf: paracli.s paracomm.o

mushroom.elf: LDFLAGS += -T doscom.ld
mushroom.elf: mushroom.s paracomm.o

polos.img: fat12boot.bin polmon.com polio.com mushroom.com
	dd if=/dev/zero of=$@ bs=512 count=720
	mformat -i $@ -t 40 -h 2 -s 9
	mcopy -i $@ polio.com ::/
	mcopy -i $@ polmon.com ::/
	mcopy -i $@ mushroom.com ::/
	dd if=fat12boot.bin of=$@ conv=notrunc

.PHONY: clean
clean:			## Remove generated files
	rm -rf *.bin *.elf *.o *.com polos.img

.PHONY: dev-image
dev-image:
	docker build -t $(dev-image) --target dev .

.PHONY: dev
dev: dev-image	## Launch a dev container
	docker run -it --rm -v $(CURDIR):/workspace $(dev-image)


.PHONY: binaries
binaries:		## Build all small binaries
	docker build --build-arg TARGET=readfloppy.bin -o . --target=export .
	docker build --build-arg TARGET=writefloppy.bin -o . --target=export .
	docker build --build-arg TARGET=crc16.bin -o . --target=export .
	docker build --build-arg TARGET=wozmon.bin -o . --target=export .
	docker build --build-arg TARGET=hello.bin -o . --target=export .
	docker build --build-arg TARGET=copy.bin -o . --target=export .
	docker build --build-arg TARGET=call.bin -o . --target=export .
	docker build --build-arg TARGET=format.bin -o . --target=export .
	docker build --build-arg TARGET=readio.bin -o . --target=export .
	docker build --build-arg TARGET=writeio.bin -o . --target=export .

.PHONY: floppy
floppy:			## Make a bootable floppy image
	docker build --build-arg TARGET=polos.img -o . --target=export .


.PHONY: help
help:           ## Show this help
	@echo Noteworthy targets:
	@egrep '^[a-zA-Z_-]+:.*?## .*$$' $(firstword $(MAKEFILE_LIST)) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'
.DEFAULT_GOAL := help