makefile 中定义宏位置需要注意一下

 1 CUR_DIR = $(shell pwd)
 2
 3 CFLAGS = -g -Wall
 4 GCC = gcc
 5 GXX = g++
 6
 7 TARGET = exe.out
 8
 9 SRC_FILES += $(shell find $(CUR_DIR) -name *.cc) 10           += $(shell find $(CUR_DIR) -name *.cpp)
11
12 OBJS = fatal-impl.o log.o
13
14 INCLUDE += -I.
15 RM = rm -f
16
17 LINK =
18 CFLAGS = -DNS3_LOG_ENABLE -g -Wall -O0
19
20 all: $(OBJS) test.o
21     $(GXX) $(CFLAGS) $^ -o $(TARGET) $(LINK)
22
23 test.o: test.cpp
24     $(GXX) -c $(CFLAGS) $^ -o [email protected]
25
26 $(OBJS): %.o : %.cc
27     $(GCC) -c $(CFLAGS) $(INCLUDE) $< -o [email protected]
28
29 .PHONY : clean
30 clean:
31     $(RM) $(OBJS)
32     $(RM) $(TARGET)

上面-D选项放在-c选项前宏定义不起作用，修改放在-c选项后面后ok，

相当于在需要编译的文件最开始位置添加#define xxx

makefile 中定义宏位置需要注意一下,布布扣,bubuko.com