Makefile循环依赖项已删除 [英] Makefile circular dependency dropped

问题描述

我正在尝试为我的项目创建一个生成文件，但是在运行该文件时出现错误 像:

I am trying to create a makefile for my project, but while running it I am getting an error like:

make: Circular database.cpp <- database.cpp dependency dropped

make: database.cpp' is up to date.

这是我的Makefile:

Here is my Makefile:

HEADERFILES = $(wildcard *.h)
CPPFILES = $(wildcard *.cpp)
OBJFILES = $(patsubst %.cpp ,%.o ,$(wildcard *.cpp))
$(OBJFILES): $(CPPFILES) $(HEADERFILES)
    g++ -c -o $(OBJFILES) $(CPPFILES)
    ar rvs libdatabase.a $(OBJFILES) 

我只有一个.cpp和.h文件.请有人纠正它.

I have only one .cpp and .h file. Please someone correct it.

推荐答案

您的patsubst中有多余的空间，阻止了正确的匹配，因此OBJFILES是"database.cpp".您可以像这样纠正它:

You have an extra space in your patsubst which is preventing a correct match, so that OBJFILES is "database.cpp". You can correct it like so:

OBJFILES = $(patsubst %.cpp,%.o ,$(wildcard *.cpp))

但是，这仍然会使您留下一个makefile，当您向代码库中添加第二个源文件时，makefile将会严重失败.我建议您这样做:

But that still leaves you with a makefile that will fail badly when you add a second source file to the codebase. I suggest you do it this way:

$(OBJFILES): %.o : %.cpp $(HEADERFILES)
    g++ -c -o $@ $<
    ar rvs libdatabase.a $@

这篇关于Makefile循环依赖项已删除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！