Makefile包含来自不同目录的makefile [英] Makefile include makefile from different directory

问题描述

我有两个文件，directoryA/Makefile和directoryB/Makefile.

directoryA/Makefile取决于较大而复杂的directoryB/Makefile中的目标.

directoryA/Makefile depends on targets in a rather large and complex directoryB/Makefile.

我可以进行递归制作

$(MAKE) -C directoryB

但是出于几个原因，这是不可取的.两个主要的原因:我不得不多次执行makefile，并且make无法正确知道何时需要重建目标.

But that is undesirable for several reasons. Two big reasons: I make have to execute the makefile several times, and make can't correctly know when rebuilding a target is necessary.

我想使用include指令.问题是双重的:

I would like to use the include directive. The problem is twofold:

1. directoryB/Makefile中的目标都是相对于该Makefile定义的.

1. The targets in directoryB/Makefile are all defined relative to that Makefile.

许多命令取决于工作目录为directoryB.

Many commands depend on the working directory being directoryB.

递归make解决了这两个问题，但是有很大的缺点(如前所述).使用include时是否有办法解决这两个问题?

Recursive make solves both of these problems, but with big disadvantages (mentioned earlier). Is there a way to solve both problems when using include?

推荐答案

很难不见directoryA/Makefile很难说，但是另一种选择是先include directoryB/Makefile然后

It's hard to say without seeing directoryA/Makefile, but another alternative is to have it include directoryB/Makefile, then

cd directoryB
make -f ../directoryA/Makefile

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