需要一个可以处理丢失文件的makefile依赖规则 [英] Need a makefile dependency rule that can handle missing files

问题描述

我们在系统中使用GNU Make。在makefile的最后，我们有一个名为Makedepends的包，它使用-MM在gcc上打开一堆.d文件。然后，使用include $（CXXFILES：.cc = .d）行为.cc文件添加.d文件。但是当我们删除文件或移动文件时，依赖步骤中断，我们必须手动删除.d文件（即使是make clean也不起作用，因为依赖关系失败）

有没有办法生成这些依赖性的.d文件，还是包含这些依赖性的.d文件，它将优雅地处理文件删除或重定位？

编辑：例如：我有serial.cc和makefile生成一个serial.d文件，它对buffer.h有一个依赖，但是我改变它，所以我不需要buffer.h，我删除了buffer.h。下一次运行make时，它会阻塞，因为它包含仍然使serial.o依赖于buffer.h的.d文件。

解决方案

http://make.paulandlesley.org/autodep.html 有一个描述这个确切的问题，以及几种方法。第一个有点误导，但高级基本上是发生的。

We use GNU Make for our system. At the end of our makefiles, we have an include called Makedepends which generates a bunch of .d files using -MM switch on gcc. We then include the .d file for each .cc file using an include $(CXXFILES:.cc=.d) line. But when we delete file or move files, the dependancies step breaks and we have to manually delete the .d files (even a make clean doesn't work because the dependencies fail)

Is there a way to generate these dependency .d files or include these dependency .d files which will gracefully handle a file deletion or relocation?

EDIT: For example: I have serial.cc and the makefiles generate a serial.d file which has a dependency on buffer.h but then I change it so I don't need buffer.h any more and I delete buffer.h. Next time I run make, it will choke because it includes the .d file which still makes serial.o depend on buffer.h.

解决方案

http://make.paulandlesley.org/autodep.html has a description of this exact problem, and a couple of ways around it. The first is a bit misguided, but the "advanced" is essentially spot on.

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