makefile opencv的案例

 CXX = g++
 LIBS +=`pkg-config --libs opencv`
 INC +=`pkg-config --cflags opencv`
 CPPFLAGS += -g -std=c++ -Wall

 SRCS = detect.cpp
 TARGET = detect
 OBJS = detect.o

 $(TARGET):$(OBJS)
     $(CXX) $(INC) $(CPPFLAGS) $(OBJS) -o $(TARGET) $(LIBS)
 $(OBJS):%.o:%.cpp
     $(CXX) $(INC) $(CPPFLAGS) -c $< -o $@

 .PHONY:clean
 clean:
     rm -r *.o $(TARGET)

 CXX = g++
 LDLIBS += `pkg-config --libs opencv`
 INC += `pkg-config --cflags opencv`
 CPPFLAGS += -g -std=c++ -Wall -I./

 TARGET = edges
 OBJS = edges.o label.o
 SRCS = edges.cpp label.cpp
 HEAD = label.hpp

 $(TARGET):$(OBJS)
     $(CXX) -o $(TARGET) $(OBJS) $(LDLIBS)

 %.o:%.c $(HEAD)
     $(CXX) $(INC) $(CPPFLAGS) -c $> -o $@

 .PHONY:clean
 clean:
     rm -r *.o 

 CXX = g++
 INC += `pkg-config --cflags opencv`
 LIBS += `pkg-config --libs opencv`

 #dir
 DIR_INC = ./include
 DIR_SRC = ./src
 DIR_OBJ = ./obj
 DIR_BIN = ./bin

 CPPFLAGS += -g -std=c++ -Wall -I${DIR_INC}

 #SRC = $(wildcard ${DIR_SRC}/*.cpp)
 SRC1 = ${DIR_SRC}/detect.cpp ${DIR_SRC}/tools.cpp
 OBJ1 = $(patsubst %.cpp,${DIR_OBJ}/%.o,$(notdir ${SRC1}))
 BIN_TARGET1 = ${DIR_BIN}/detect

 SRC2 = ${DIR_SRC}/detect2.cpp ${DIR_SRC}/tools.cpp
 OBJ2 = $(patsubst %.cpp,${DIR_OBJ}/%.o,$(notdir ${SRC2}))
 BIN_TARGET2 = ${DIR_BIN}/detect2

 SRC3 = ${DIR_SRC}/detect_circle.cpp ${DIR_SRC}/tools.cpp
 OBJ3 = $(patsubst %.cpp,${DIR_OBJ}/%.o,$(notdir ${SRC3}))
 BIN_TARGET3 = ${DIR_BIN}/detect_circle

 SRC4 = ${DIR_SRC}/detect_circle2.cpp ${DIR_SRC}/tools.cpp
 OBJ4 = $(patsubst %.cpp,${DIR_OBJ}/%.o,$(notdir ${SRC4}))
 BIN_TARGET4 = ${DIR_BIN}/detect_circle2

 SRC5 = ${DIR_SRC}/hog_svm_test.cpp ${DIR_SRC}/tools.cpp
 OBJ5 = $(patsubst %.cpp,${DIR_OBJ}/%.o,$(notdir ${SRC5}))
 BIN_TARGET5 = ${DIR_BIN}/hog_svm_test

 SRC6 = ${DIR_SRC}/hog_svm_test2.cpp ${DIR_SRC}/tools.cpp
 OBJ6 = $(patsubst %.cpp,${DIR_OBJ}/%.o,$(notdir ${SRC6}))
 BIN_TARGET6 = ${DIR_BIN}/hog_svm_test2

 SRC7 = ${DIR_SRC}/hog_svm_test2.cpp ${DIR_SRC}/tools.cpp
 OBJ7 = $(patsubst %.cpp,${DIR_OBJ}/%.o,$(notdir ${SRC7}))
 BIN_TARGET7 = ${DIR_BIN}/hog_svm_test3

 detect:${BIN_TARGET1}

 detect2:${BIN_TARGET2}

 detect_circle:${BIN_TARGET3}

 detect_circle2:${BIN_TARGET4}

 hog_svm_test:${BIN_TARGET5}

 hog_svm_test2:${BIN_TARGET6}

 hog_svm_test3:${BIN_TARGET7}

 # echo:
 #     echo $(OBJ1)
 #     echo $(BIN_TARGET)
 #     echo $(notdir ${SRC1})

 ${BIN_TARGET1}:${OBJ1}
     $(CXX) -o $@  $(OBJ1)  $(LIBS)

 ${BIN_TARGET2}:${OBJ2}
     $(CXX) -o $@  $(OBJ2)  $(LIBS)

 ${BIN_TARGET3}:${OBJ3}
     $(CXX) -o $@  $(OBJ3)  $(LIBS)

 ${BIN_TARGET4}:${OBJ4}
     $(CXX) -o $@  $(OBJ4)  $(LIBS)

 ${BIN_TARGET5}:${OBJ5}
     $(CXX) -o $@  $(OBJ5)  $(LIBS)

 ${BIN_TARGET6}:${OBJ6}
     $(CXX) -o $@  $(OBJ6)  $(LIBS)

 ${BIN_TARGET7}:${OBJ7}
     $(CXX) -o $@  $(OBJ7)  $(LIBS)

 ${DIR_OBJ}/%.o:${DIR_SRC}/%.cpp
     $(CXX)  $(CPPFLAGS) -c  $< -o $@

 .PHONY:clean
 clean:
     find ${DIR_OBJ} -name *.o -exec rm -rf {} \;