# Makefile for CHIBI PC-09 Firmware

.PHONY: generate all clean
.IGNORE: clean
.DEFAULT_GOAL := all

# ------------------------------------------------------------------------------
# Project Defaults & Folders
# ------------------------------------------------------------------------------

TARGET   := boot
TARGREC  := $(TARGET).s19
TARGROM  := $(TARGET).bin
SRCDIR   := src/
BUILDDIR := build/
GENS     := $(SRCDIR)version.s $(SRCDIR)bbhash.s
SRCS     := $(wildcard $(SRCDIR)*.s)
OBJS     := $(patsubst $(SRCDIR)%.s,$(BUILDDIR)%.o,$(SRCS))
INCS     := $(wildcard $(SRCDIR)*.inc)

# ------------------------------------------------------------------------------
# Toolchain Definitions
# ------------------------------------------------------------------------------

AS  := lwasm
LD  := lwlink
FIX := objcopy

ASFLAGS := -f obj
LDFLAGS := -f srec -m map.txt -s linkscript

# ------------------------------------------------------------------------------
# Rules and Phony Targets
# ------------------------------------------------------------------------------

all: $(TARGROM)

# Fix srec into flashable bin file
$(TARGROM): $(TARGREC)
	$(FIX) -I srec -O binary $< $@

# Link objects
$(TARGREC): $(OBJS)
	$(LD) $(LDFLAGS) -o $@ $^

# Assemble objects
$(OBJS): $(BUILDDIR)%.o : $(SRCDIR)%.s
	-@mkdir -p $(BUILDDIR)
	$(AS) $(ASFLAGS) -o $@ $<

# Pseudo target for generation step
generate: $(GENS)

# Run generation scripts
$(GENS): bbmkhash
	./bbmkhash > src/bbhash.s
	./genver.sh

# Build bbmkcmds, used to generate src/cmds.s
bbmkhash: bbmkhash.c
	cc -o $@ $<

clean:
	@echo 'Cleaning up intermediary files...'
	@rm -rv $(TARGROM) $(TARGREC) map.txt $(BUILDDIR)
	@rm -rv $(GENS)