ifeq ($(strip $(DEVKITPPC)),)
$(error "Please set DEVKITPPC in your environment. export DEVKITPPC=<path to>devkitPPC")
endif

ifeq ($(filter $(DEVKITPPC)/bin,$(PATH)),)
export PATH:=$(DEVKITPPC)/bin:$(PATH)
endif

CC = powerpc-eabi-gcc
LINK = powerpc-eabi-ld
AS = powerpc-eabi-as
OBJCOPY = powerpc-eabi-objcopy
CFLAGS += -Wall -mbig-endian -mcpu=750 -meabi -std=c99 -O2
LDFLAGS += --script=ccd00.ld -EB -L"$(DEVKITPPC)/powerpc-eabi/lib" -Map=output.map -lm -lg -lc

CFILES = $(wildcard source/*.c)
BINFILES = $(wildcard data/*.bin)
OFILES = $(BINFILES:data/%.bin=build/%.bin.o)
OFILES += $(CFILES:source/%.c=build/%.o)
DFILES = $(CFILES:source/%.c=build/%.d)
SFILES = $(wildcard source/*.s)
OFILES += $(SFILES:source/%.s=build/%.o)
PROJECTNAME = ${shell basename "$(CURDIR)"}
CWD = "$(CURDIR)""

#---------------------------------------------------------------------------------
# canned command sequence for binary data, taken from devkitPPC
#---------------------------------------------------------------------------------
define bin2o
	bin2s $< | $(AS) -o $(@)
	echo "extern const u8" `(echo $(<F) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"_end[];" > source/`(echo $(<F) | tr . _)`.h
	echo "extern const u8" `(echo $(<F) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"[];" >> source/`(echo $(<F) | tr . _)`.h
	echo "extern const u32" `(echo $(<F) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`_size";" >> source/`(echo $(<F) | tr . _)`.h
endef

.PHONY:=all dirs

all: dirs $(PROJECTNAME).bin

dirs:
	mkdir -p build

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

$(PROJECTNAME).elf: $(OFILES)
	$(LINK) $(LDFLAGS) -o $(PROJECTNAME).elf $(filter-out build/crt0.o, $(OFILES))

clean:
	@rm -f build/*.o build/*.d
	@rm -f $(PROJECTNAME).elf $(PROJECTNAME).bin
	@echo "all cleaned up !"

-include $(DFILES)

build/%.o: source/%.c
	$(CC) $(CFLAGS) -c $< -o $@
	@$(CC) -MM $< > build/$*.d

build/%.o: source/%.s
	$(CC) $(CFLAGS) -xassembler-with-cpp -c $< -o $@
	@$(CC) -MM $< > build/$*.d

build/%.bin.o: data/%.bin
	@echo $(notdir $<)
	@$(bin2o)