makefile

CROSS   =  arm-linux-
CFLAGS  = -nostdlib -nostdinc -Wall -g -O2 
INCLUDE = -I$(shell pwd)/inc
#LFLAGS  =  #-L

export 	CROSS INCLUDE CFLAGS 
#objs := start.o init.o  main.o led.o key.o adc.o Nand.o timer.o uart.o 

#模式匹配当前目录下所有.c 文件，wildcard为一个预定义的宏
C_sources_files  = $(wildcard *.c)
S_sources_files  = $(wildcard *.S)

#模式匹配，由当前目录下所有.c文件得到对应的.o文件
C_objs          = $(patsubst %.c,%.o,$(C_sources_files))
S_objs          = $(patsubst %.S,%.o,$(S_sources_files))

.PHONY :all
all:uCOS.bin

uCOS.bin: $(S_objs) $(C_objs) obj/libsys.a obj/libsrc.a obj/libucos.a
	${CROSS}ld -Tlink.lds  -o uCOS.elf $^  
#	${CROSS}gcc -Tlink.lds $(LFLAGS) $(INCLUDE) -o fdapp.elf $^  
	${CROSS}objcopy -O binary -S uCOS.elf $@ 
	${CROSS}objdump -D -m arm uCOS.elf > uCOS.dis  
	mv *.o ./obj
	mv *.bin ./obj
	mv *.elf ./obj
	mv *.dis ./obj	

.PHONY : obj/libsys.a
obj/libsys.a:
	cd sys; make; cd ..

.PHONY : obj/libsrc.a
obj/libsrc.a:
	cd src; make; cd ..

.PHONY : obj/libsrc.a
obj/libucos.a:
	cd ucos; make; cd ..

%.o:%.c  
	${CROSS}gcc $(CFLAGS) $(INCLUDE) -c -o $@ $< 

%.o:%.S  
	${CROSS}gcc $(CFLAGS) $(INCLUDE) -c -o $@ $< 

.PHONY:clean
clean:  
	make clean -C sys
	make clean -C src
	make clean -C ucos
	rm -f *.elf *.o *.bin *.dis
	rm -f ./obj/*.elf ./obj/*.bin ./obj/*.dis ./obj/*.o ./obj/*.a