我有以下目录结构
(root)
/ / \ \
/ | | \
src obj include bin
我想使用隐式规则来编译.cc
中root\src
到.o
个文件中的所有root\obj
个文件。
到目前为止,这是我的makefile:
basedir = .
incl = ${basedir}\include
obj = ${basedir}\obj
src = ${basedir}\src
lib = ${basedir}\lib
bin = ${basedir}\bin
CXX = gcc
LDLIBS = -lstdc++ -lmingw32 -lSDLmain -lSDL -lSDL_image -lchipmunk -lSDL_ttf \
-lSDL_mixer
LDFLAGS = -L${lib}
objects = $(addprefix ${obj}\, GameObject.o PhysicalObject.o \
Terrain.o Timer.o main.o ImageLoader.o Player.o )
sources = $(addprefix ${src}\, GameObject.cc PhysicalObject.cc \
Terrain.cc Timer.cc main.cc ImageLoader.cc Player.cc )
Cyborg : ${objects}
${CXX} ${objects} -o ${bin}\Cyborg.exe -L${lib} ${LDFLAGS} ${LDFLAGS}
${obj}\%.o : ${src}\%.c
${CXX} ${src}\$^ -c -o ${obj}\$@
.PHONY: clean
clean :
rm ${bin}\Cyborg.exe ${objects}
我得到的错误是make: *** No rule to make target .\obj\GameObject.o, needed by Cyborg. Stop.
知道出了什么问题吗?我很擅长制作文件,所以这可能非常明显。
答案 0 :(得分:3)
应用评论中的所有想法(并添加我自己的一些简单的想法),我们得到:
basedir = .
incl = ${basedir}/include
obj = ${basedir}/obj
src = ${basedir}/src
lib = ${basedir}/lib
bin = ${basedir}/bin
CXX = g++
LDLIBS = -lstdc++ -lmingw32 -lSDLmain -lSDL -lSDL_image -lchipmunk -lSDL_ttf \
-lSDL_mixer
LDFLAGS = -L${lib}
objects = $(addprefix ${obj}/, GameObject.o PhysicalObject.o \
Terrain.o Timer.o main.o ImageLoader.o Player.o )
sources = $(addprefix ${src}/, GameObject.cc PhysicalObject.cc \
Terrain.cc Timer.cc main.cc ImageLoader.cc Player.cc )
Cyborg : ${objects}
${CXX} ${objects} -o ${bin}/Cyborg.exe -L${lib} ${LDFLAGS} ${LDFLAGS}
${obj}/%.o : ${src}/%.c
${CXX} $^ -c -o $@
.PHONY: clean Cyborg
clean :
rm -f ${bin}\Cyborg.exe ${objects}
“make Cyborg”对这个Makefile做了什么?
答案 1 :(得分:1)
这可能需要几次迭代。
尝试一些简单的规则,以增加复杂性,并告诉我们结果:
./obj/GameObject.o : ./src/GameObject.cc
@echo trying to build $@ from $<
./obj/GameObject.o : ./obj/%.o : ./src/%.cc
@echo trying to build $@ from $<
$(objects) : ./obj/%.o : ./src/%.cc
@echo trying to build $@ from $<
./obj/%.o : ./src/%.cc
@echo trying to build $@ from $<
答案 2 :(得分:0)
${obj}\%.o : ${src}\%.c --> ${obj}\%.o : ${src}\%.cc
答案 3 :(得分:-2)
我和GNU make有类似的问题。尝试为对象制定明确的规则:
$(obj)\GameObject.o: $(src)\GameObject.cc
$(obj)\PhysicalObject.o: $(src)\PhysicalObject.cc
# and so on for each object