Makefile中定义一个宏开关

在Makefile中定义一个宏需这样这样执行

  $(CC) $(CFLAGS) $^ -o $@

main.c文件如下

#include 
int main()
{
#ifdef _YUQIANG
        printf("Hell Yuqiang \n");
#else
printf("Sorry to lost you \n");

#endif

}

Makefile文件如下

C = gcc
RM = rm

CFLAGS+=-D _YUQIANG

TARGETS := myapp

all:$(TARGETS)

$(TARGETS):main.c
        $(CC) $(CFLAGS) $^ -o $@


clean:
        -$(RM) -f *.o
        -$(RM) -f $(TARGETS)

make执行

makeclean 清除