AS		= clang
CXX		= clang++
LD		= ld.lld
OBJCOPY		= llvm-objcopy

ARCH		= aarch64
TARGET		= ${ARCH}-none-elf
BOARD		= virt

ASFLAGS		= -target ${TARGET}
ASFILES		= boot.S

CXXFLAGS	= -target ${TARGET}
CXXFLAGS        +=-Wall -Wextra -Werror
CXXFLAGS        +=-nostdlib -fno-exceptions -std=c++11
CXXFLAGS	+=-ffreestanding -mgeneral-regs-only
CXXFLAGS	+=-Iinclude
CXXFILES	= kernel.cc uart_${BOARD}.cc

OBJS		= ${ASFILES:.S=.o} ${CXXFILES:.cc=.o}

-include	config.mk

.PHONY:	clean qemu gdb-remote

all: squat.img

squat.img: squat.elf
	${OBJCOPY} squat.elf -O binary squat.img

squat.elf: linker.ld ${OBJS}
	${LD} -T linker.ld -o squat.elf ${OBJS}

.S.o:
	${AS} ${ASFLAGS} -c $< -o $@

clean:
	rm -rf *.o squat.elf squat.img

qemu: squat.img
	qemu-system-${ARCH} -M ${BOARD} -cpu cortex-a53 \
			    -kernel squat.img -nographic -monitor none -serial stdio
gdb-remote: squat.img
	qemu-system-${ARCH} -s -S -M ${BOARD} -cpu cortex-a53 \
			    -kernel squat.img -nographic -monitor none -serial stdio