1 AS		= clang
2 CXX		= clang++
3 LD		= ld.lld
4 OBJCOPY		= llvm-objcopy
5 
6 ARCH		= aarch64
7 TARGET		= ${ARCH}-none-elf
8 BOARD		= virt
9 
10 ASFLAGS		= -target ${TARGET}
11 ASFILES		= boot.S
12 
13 CXXFLAGS	= -target ${TARGET}
14 CXXFLAGS        +=-Wall -Wextra -Werror
15 CXXFLAGS        +=-nostdlib -fno-exceptions -std=c++11
16 CXXFLAGS	+=-ffreestanding -mgeneral-regs-only
17 CXXFLAGS	+=-Iinclude
18 CXXFILES	= kernel.cc uart_${BOARD}.cc
19 
20 OBJS		= ${ASFILES:.S=.o} ${CXXFILES:.cc=.o}
21 
22 -include	config.mk
23 
24 .PHONY:	clean qemu gdb-remote
25 
26 all: squat.img
27 
28 squat.img: squat.elf
29 	${OBJCOPY} squat.elf -O binary squat.img
30 
31 squat.elf: linker.ld ${OBJS}
32 	${LD} -T linker.ld -o squat.elf ${OBJS}
33 
34 .S.o:
35 	${AS} ${ASFLAGS} -c $< -o $@
36 
37 clean:
38 	rm -rf *.o squat.elf squat.img
39 
40 qemu: squat.img
41 	qemu-system-${ARCH} -M ${BOARD} -cpu cortex-a53 \
42 			    -kernel squat.img -nographic -monitor none -serial stdio
43 gdb-remote: squat.img
44 	qemu-system-${ARCH} -s -S -M ${BOARD} -cpu cortex-a53 \
45 			    -kernel squat.img -nographic -monitor none -serial stdio