c++ - 自动化我的 Makefile

Question

我正在学习创建 makefile。我的文件夹结构看起来像这样..

Project

    bin        //this is where the executable "e" is kept
          e
    obj        //this is where the obj files generated are kept
          Node.o
          Node1.o
    src        //this is where .cpp files resides
          Folder
                   Node.cpp
          Folder2
                   Node1.cpp
    include    //this is where .hhp files resides
          Folder
                   Node.hpp
          Folder2
                   Node1.hpp
    makefile

我正在使用 Ubuntu 12.04 并尝试使用 g++ 对其进行编译。 makefile 与以下文件夹一起位于项目文件夹中:src、include、obj 和 bin

我的 makefile 看起来像这样

CC = g++
DEBUG = -g
CFLAGS = -Wall -c $(DEBUG)
LFLAGS = -Wall $(DEBUG)
TARGET = bin/
OBJ = obj/
INCLUDE = include/
SRC = src/

SOURCES=$(wildcard $(SRC)**/*.cpp $(SRC)*.cpp)
HEADERS=$(wildcard include/**/*.hpp include/*.hpp)
OBJECTS=$(patsubst %.cpp,$(OBJ)%.o,$(notdir $(SOURCES)))

All : $(TARGET)e

$(TARGET)e : make_dir $(OBJECTS)
    $(CC) $(LFLAGS) $(OBJECTS) -o $@

$(OBJ)Node.o : $(SRC)Folder/Node.cpp $(HEADERS)      
    $(CC) $(CFLAGS) -I$(INCLUDE) $< -o $@
$(OBJ)Node1.o : $(SRC)Folder2/Node1.cpp $(HEADERS)
    $(CC) $(CFLAGS) -I$(INCLUDE) $< -o $@

make_dir:
    mkdir -p obj bin
clean :
    -rm -rf bin
    -rm -rf obj 
    -rm -f e *.o *~

这段代码运行得很好，但我想做的是替换下面的代码片段

$(OBJ)Node.o : $(SRC)Folder/Node.cpp $(HEADERS)      
    $(CC) $(CFLAGS) -I$(INCLUDE) $< -o $@
$(OBJ)Node1.o : $(SRC)Folder2/Node1.cpp $(HEADERS)
    $(CC) $(CFLAGS) -I$(INCLUDE) $< -o $@

更像一些东西

%.o : %.cpp $(HEADERS)      
    $(CC) $(CFLAGS) -I$(INCLUDE) $< -o $@ 

概括整个馈送和映射的东西。换句话说，以一种我不应该担心或编辑的方式自动化 makefile，直到层次结构被打乱。

Answer 1

$(OBJ)/%.o : $(SRC)Folder/%.cpp $(HEADERS)      
    $(CC) $(CFLAGS) -I$(INCLUDE) $< -o $@