ifeq ($(BUILDROOT),)
$(error BUILDROOT IS NOT SET!)
endif

CC := ${TARGET}-gcc

SRC := $(wildcard **/*.[cS]*)
OBJ := $(patsubst %, %.o, $(basename $(basename $(SRC))))

CFLAGS := -Wall -Wextra -pedantic -ffreestanding -mcmodel=large
CFLAGS += -ggdb -O0
ASFLAGS += -ggdb
CPPFLAGS += -I include
LDFLAGS := -n -nostdlib -lgcc -T Link.ld

kernel: $(OBJ)
	$(LINK.c) $^ -o $@

%.o: %.S.py
	python3 $^ | $(COMPILE.S) $(DEPFLAGS) -x assembler-with-cpp - -o $@

# Automatic dependency tracking
DEP := $(OBJ:.o=.d)
DEPFLAGS = -MT $@ -MMD -MP -MF $*.d
$(OBJ): CPPFLAGS += $(DEPFLAGS)
%.d: ;

DESTDIR ?= $(BUILDROOT)/sysroot

$(DESTDIR)$(PREFIX)/kernel: kernel
	install -D kernel $(DESTDIR)$(PREFIX)/kernel

install: $(DESTDIR)$(PREFIX)/kernel

clean:
	rm -rf $(OBJ) $(DEP) kernel

.PHONY: install

# Include automatic dependency rules
include $(DEP)