本文给出万能Makefile的具体实现，以及对其中的关键点进行解析。所谓C++万能Makefile，即可编译链接所有的C++程序，而只需作很少的修改。
号称万能Makefile，一统江湖。我对原版的Makefile做了些修改。首先揭开它的庐山真面目：
#################################################### # Generic makefile - 万能Makefile # for compiling and linking C++ projects on Linux # Author: George Foot Modified:Jackie Lee #################################################### ### Customising # # Adjust the following if necessary; EXECUTABLE is the target # executable's filename, and LIBS is a list of libraries to link in # (e.g. alleg, stdcx, iostr, etc). You can override these on make's # command line of course, if you prefer to do it that way. # # EXECUTABLE := main # 可执行文件名 LIBDIR:= # 静态库目录 LIBS := # 静态库文件名 INCLUDES:=. # 头文件目录 SRCDIR:= # 除了当前目录外，其他的源代码文件目录 # # # Now alter any implicit rules' variables if you like, e.g.: CC:=g++ CFLAGS := -g -Wall -O3 CPPFLAGS := $(CFLAGS) CPPFLAGS += $(addprefix -I,$(INCLUDES)) CPPFLAGS += -MMD # # # The next bit checks to see whether rm is in your djgpp bin # # directory; if not it uses del instead, but this can cause (harmless) # # `File not found' error messages. If you are not using DOS at all, # # set the variable to something which will unquestioningly remove # # files. # RM-F := rm -f # # You shouldn't need to change anything below this point. # SRCS := $(wildcard *.cpp) $(wildcard $(addsuffix /*.cpp, $(SRCDIR))) OBJS := $(patsubst %.cpp,%.o,$(SRCS)) DEPS := $(patsubst %.o,%.d,$(OBJS)) MISSING_DEPS := $(filter-out $(wildcard $(DEPS)),$(DEPS)) MISSING_DEPS_SOURCES := $(wildcard $(patsubst %.d,%.cpp,$(MISSING_DEPS))) .PHONY : all deps objs clean veryclean rebuild info all: $(EXECUTABLE) deps : $(DEPS) objs : $(OBJS) clean : @$(RM-F) *.o @$(RM-F) *.d veryclean: clean @$(RM-F) $(EXECUTABLE) rebuild: veryclean all ifneq ($(MISSING_DEPS),) $(MISSING_DEPS) : @$(RM-F) $(patsubst %.d,%.o,$@) endif -include $(DEPS) $(EXECUTABLE) : $(OBJS) $(CC) -o $(EXECUTABLE) $(OBJS) $(addprefix -L,$(LIBDIR)) $(addprefix -l,$(LIBS)) info: @echo $(SRCS) @echo $(OBJS) @echo $(DEPS) @echo $(MISSING_DEPS) @echo $(MISSING_DEPS_SOURCES) |
注：1)命令行前的空白符必须为一个制表符(Tab)；如，@$(RM-F) *.o前不是空格，而是一个制表符；
