makefile 笔记

ASM
 = nasm

 ASMFLAGS
 = -I include/


 TARGET
 = boot.bin loader.bin


 .PHONY : everything clean all


 everything : $(TARGET)                                      
   #本例 make 和 make everything一样



 clean :                                                                    
  #执行 make clean 将会执行  rm -f $(TARGET) 即   rm -f  boot.bin loader.bin

rm -f $(TARGET)



 all : clean everything                                           
  #执行 make all  ，clean和everything所表示的动作将分别执行



 boot.bin : boot.asm include/load.inc include/fat12hdr.inc

$(ASM) $(ASMFLAGS) -o $@ $<                                                      
#等价于 nasm  -o  loader.bin  loader.asm



 loader.bin : loader.asm include/load.inc include/fat12hdr.inc include/pm.inc

$(ASM) $(ASMFLAGS) -o $@ $<

#make everything 即执行
#nasm  -I  include/  -o  boot.bin  boot.asm
#nasm  -I  include/  -o  loader.bin  loader.asm