### -*-makefile-*-

V			 = 0
vcond			 = $(call vcond_$V,$1,$2)
vcond_0			 = $1
vcond_1			 = $2
V_AT			 = $(call vcond,@)
vtag			 = \
	$(call vcond,@printf "  %-8s %s\n" "$1" "$(or $2,$@)";)

CC			 = gcc -m64
CFLAGS			 = -O2 -g -Wall -Werror

AS			 = gcc -m64
ASFLAGS			 = -O2 -g

LD			 = gcc -m64
LDFLAGS			 =

%.o: %.c
	$(call vtag,CC)$(CC) -c -o $@ $(CFLAGS) $<

%.o: %.S
	$(call vtag,AS)$(AS) -c -o $@ $(ASFLAGS) $<

all:: xchg
xchg: xchg.o main.o
	$(call vtag,LD)$(LD) -o $@ $^

clean::; rm -f xchg *.o