如何确保我的makefile检测到我的头文件和cpp文件中的更改? [英] How do I ensure my makefile detects changes in my header and cpp files?
问题描述
当前，每当我执行make我的makefile告诉我
Currently, whenever I do make my makefile tells me
make:`some/obj/file.o'是最新的.
make: `some/obj/file.o' is up to date.
无论我是否编辑了生成该目标文件所涉及的任何文件.如何使其检测变化?这是一个重现该问题的简单makefile:
regardless of whether I've edited any of the files involved in generating that object file. How do I make it detect changes? Here is a simple makefile that reproduces the problem:
SHELL := /bin/bash
src := src
sources := $(shell find $(srcDir) -name "*.cpp")
objects := $(sources:%.cpp=%.o)
-include $(sources:%.cpp=%.d)
all: prog
prog: $(objects)
g++ $(objects) -o /a.out
%.o: %.cpp
$(CXX) $(CXXFLAGS) -MMD -MP -c $< -I $(srcDir) -o $@
clean:
find $(srcDir) -type f -iname "*.o" -delete
find $(srcDir) -type f -iname "*.d" -delete
当前，我必须每次都运行make clean来重新编译它，这显然不理想！
currently I have to run make clean everytime to get it to recompile, which obviously isn't ideal!
这是我根据Chnossos的回答进行的尝试:
EXE := a.out
SRCDIR := src
SRC := $(shell find $(srcDir) -name "*.cpp")
DIR := .obj
OBJ := $(SRC:%.cpp=$(DIR)/%.o)
DEP := $(OBJ:.o=.d)
CXXFLAGS += -std=c++11
CXXFLAGS += -I /home/arman/lib/eigen-eigen-6b38706d90a9
CXXFLAGS += -I /home/arman/lib/boost_1_55_0
CXXFLAGS += -I /home/arman/lib/lodepng/
CXXFLAGS += -L /home/arman/lib/boost_1_55_0/stage/lib
CPPFLAGS += -MMD -MP
.PHONY: all clean
-include $(DEP)
all: $(EXE)
$(EXE): $(OBJ)
$(CXX) $(OBJ) -o $@
$(DIR)/%.o: %.cpp
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $@ -c $< -I $(SRCDIR)
clean:
$(RM) -f $(DIR)
我现在收到以下错误:
src/core/file1.cpp:839:1:致命错误:打开依赖文件.obj/./src/core/file1.d:没有此类文件或目录
src/core/file1.cpp:839:1: fatal error: opening dependency file .obj/./src/core/file1.d: No such file or directory
请注意，我具有以下目录结构:
Note that I have the following directory structure:
/prog/makefile->生成文件 /prog/dir1/->一些cpp/hpp文件 /prog/dir2/->更多cpp/hpp文件 /prog/->这里也有一些cpp/hpp文件
/prog/makefile -> The makefile /prog/dir1/ -> some cpp/hpp files /prog/dir2/ -> more cpp/hpp files /prog/ ->there are some cpp/hpp files here too
我有很多文件夹(不仅仅是dir1和dir2)，所以我不想每次都指定它们.
I have many folders (more than just dir1 and dir2) so I'd like to not have to specify them each time.
推荐答案
SRC := $(wildcard *.cpp)
OBJ := $(SRC:.cpp=.o)
DEP := $(OBJ:.o=.d)
CPPFLAGS += -MMD -MP -I.
.PHONY: all clean
all: prog
prog: $(OBJ)
$(CXX) $(LDFLAGS) $^ $(LDLIBS)
-include $(DEP)
clean:
$(RM) $(OBJ) $(DEP)
您还可以稍作努力将.o和.d文件编译到这样的隐藏文件夹中:
You can also with a little efforts compile your .o and .d files into a hidden folder like this :
EXE := a.out
SRC := $(wildcard *.cpp)
DIR := .obj
OBJ := $(SRC:%.cpp=$(DIR)/%.o)
DEP := $(OBJ:.o=.d)
CPPFLAGS += -MMD -MP -I.
.PHONY: all clean
all: $(EXE)
$(EXE): $(OBJ)
$(CXX) $(LDFLAGS) $^ $(LDLIBS) -o $@
$(DIR)/%.o: %.cpp | $(DIR)
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $@ -c $<
$(DIR):
@mkdir $@
-include $(DEP)
clean:
$(RM) -r $(DIR)
编辑:这是我尝试进行的修改:
EDIT: Here is my attempt for your edit :
一些简短的说明，$(LDLIBS)用于-l标志，而$(LDFLAGS)用于-L标志.
Some quick note, the $(LDLIBS) is here for your -l flags, whereas $(LDFLAGS) is meant for -L flags.
SRCDIR := src
OBJDIR := .obj
EXE := a.out
SRC := $(shell find $(SRCDIR) -name "*.cpp")
OBJ := $(SRC:$(SRCDIR)/%.cpp=$(OBJDIR)/%.o)
DEP := $(OBJ:.o=.d)
LDFLAGS += -L /home/arman/lib/boost_1_55_0/stage/lib
CXXFLAGS += -std=c++11
CPPFLAGS += -I $(SRCDIR)
CPPFLAGS += -I /home/arman/lib/eigen-eigen-6b38706d90a9
CPPFLAGS += -I /home/arman/lib/boost_1_55_0
CPPFLAGS += -I /home/arman/lib/lodepng/
CPPFLAGS += -MMD -MP
.PHONY: all clean
all: $(EXE)
$(EXE): $(OBJ)
$(CXX) $(LDFLAGS) $^ $(LDLIBS) -o $@
.SECONDEXPANSION:
$(OBJDIR)/%.o: $(SRCDIR)/%.cpp | $$(@D)/
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $@ -c $<
%/:
mkdir $@
-include $(DEP)
clean:
$(RM) -r $(OBJDIR)
如果有什么缺失，请告诉我.
Tell me if something is missing.
这篇关于如何确保我的makefile检测到我的头文件和cpp文件中的更改?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
