ヘッダの依存関係も解決してくれる Makefile

README.md

directory layout

• src
  • foo.cpp
  • foo.h
  • bar/buz/
    • qux.cpp
    • qux.h
• tests
  • foo_test.cpp
• obj
• bin

Makefile

CXX = clang++
TARGET = bin/main
DEBUG = -g -O0
#RELEASE = -O3
SRCDIRS  := $(shell find src -type d)
SRCS = $(foreach dir, $(SRCDIRS), $(wildcard $(dir)/*.cpp))
OBJS = $(subst src/,obj/,$(SRCS:.cpp=.o))
DEPS = $(subst src/,obj/,$(SRCS:.cpp=.dep))
INCLUDES = -I./src
CXXFLAGS = $(DEBUG) $(RELEASE) -Wall -std=c++11 $(INCLUDES)
LDFLAGS = 

TARGET_TEST = bin/test
CXXFLAGS_TEST = -g -O0 -Wall -std=c++11 $(INCLUDES) -I.
TARGET_OBJS_FOR_TEST = $(filter-out obj/main.o,$(OBJS))
SRCDIRS_TEST  := $(shell find tests -type d)
SRCS_TEST = $(foreach dir, $(SRCDIRS_TEST), $(wildcard $(dir)/*.cpp))
OBJS_TEST = $(subst tests/,obj/tests/,$(SRCS_TEST:.cpp=.o))
DEPS_TEST = $(subst tests/,obj/tests/,$(SRCS_TEST:.cpp=.dep))

UNAME = ${shell uname}
ifeq ($(UNAME),Darwin)
SED = gsed
endif
ifeq ($(UNAME),Linux)
SED = sed
endif

.PHONY: build
build: obj/ bin/ $(TARGET)

.PHONY: all
all: build

obj/:
	mkdir obj

bin/:
	mkdir bin

obj/%.o : src/%.cpp
	mkdir -p $(dir $@)
	$(CXX) $(CXXFLAGS) -c $< -o $@

$(TARGET): $(OBJS) $(DEPS)
	$(CXX) $(OBJS) $(LDFLAGS) \
	  $(INCLUDES) \
	  -o $(TARGET)

obj/tests/%.o : tests/%.cpp
	mkdir -p $(dir $@)
	$(CXX) $(CXXFLAGS_TEST) -c $(subst obj/tests/,tests/,$(subst .o,.cpp,$@)) -o $@

.PHONY: clean
clean:
	rm -f $(OBJS)
	rm -f $(DEPS)
	rm -f $(TARGET)
	rm -f $(OBJS_TEST)
	rm -f $(DEPS_TEST)
	rm -f $(TARGET_TEST)

.PHONY: run
run: $(TARGET)
	./$(TARGET)

.PHONY: test
test: build $(OBJS_TEST) $(DEPS_TEST)
	$(CXX) $(CXXFLAGS_TEST) $(TARGET_OBJS_FOR_TEST) $(OBJS_TEST) \
		$(LDFLAGS) -lgtest \
		-o $(TARGET_TEST)
	./$(TARGET_TEST)

-include $(DEPS)
-include $(DEPS_TEST)

obj/%.dep: src/%.cpp
	mkdir -p $(dir $@)
	$(CXX) -MM $(CXXFLAGS) $(CXXFLAGS_TEST) $< | $(SED) '1i$(dir $@)' | tr -d '\n' | tr -d '\\' > $@

obj/tests/%.dep: tests/%.cpp
	mkdir -p $(dir $@)
	$(CXX) -MM $(CXXFLAGS) $(CXXFLAGS_TEST) $< | $(SED) '1i$(dir $@)' | tr -d '\n' | tr -d '\\' > $@

obj/%.o: obj,%.dep