ARCHES = x86_64 i386

ARCH ?= x86_64

CC              = zig cc -target $(ARCH)-freestanding
LD              = ld -m elf_$(ARCH)
LDSCRIPT        = make/$(ARCH)/linker.ld

-include make/$(ARCH)/make.config

CFLAGS          ?= -Og -g
CFLAGS          := $(CFLAGS) $(ARCH_CFLAGS) \
                   -Wall -Wextra -pedantic -std=gnu11 -I../ext -Isrc -fPIE
LDFLAGS         := $(LDFLAGS) -T $(LDSCRIPT) 


TARGET := kernel

CFILES    := $(shell find src -path src/arch -prune -o -type f -name '*.c' -print)
ARCHFILES := $(ARCHFILES) $(shell find src/arch/$(ARCH) -type f -name '*.c' -print)
HFILES    := $(shell find src -type f -name '*.h')
OBJ       := $(patsubst src/%,obj/$(ARCH)/%.o,$(CFILES) $(ARCHFILES))

.PHONY: all clean obj $(ARCHES)

default: bin/$(TARGET)-$(ARCH)
all: $(ARCHES)

$(ARCHES):
	@$(MAKE) ARCH=$@

bin/$(TARGET)-$(ARCH): $(OBJ)
	@mkdir -p $(@D)
	$(LD) $(LDFLAGS) $(OBJ) -o $@

obj/$(ARCH)/%.c.o: src/%.c $(HFILES) $(ARCHHEADERS)
	@mkdir -p $(@D)
	$(CC) $(CFLAGS) -c $< -o $@

clean:
	rm -rf bin obj zig-cache