Makefile和符号链接 [英] Makefile and symbolic links

问题描述

我遇到一个关于makefile的奇怪问题.我只是想在makefile中设置一个符号链接，但是在一台机器上(Linux 2.6.18-238.12.1.el5)收到一条错误消息

I'm experiencing a strange problem with a makefile. I simply want to set a symbolic link in the makefile but get an error message on one machine (Linux 2.6.18-238.12.1.el5)

make: execvp: ln: Too many levels of symbolic links

它在我的MacBook上运行正常.如果我在shell中执行相同的命令，它也可以正常工作.可能出什么问题了?是否有任何对ln重要的环境变量?

It works perfectly fine on my MacBook. It also works fine if I execute the same command in the shell. What could go wrong? Are there any environment variables important for ln?

推荐答案

错误消息中的execvp是关键.我相信这是在试图查找ln命令本身的同时，符号链接的级别太多了.

The execvp in the error message is the key, I think. I believe it is saying there are too many levels of symbolic links while trying to locate the ln command itself.

示例:

all:
    ln -nsf /tmp/foo /tmp/foo
    /tmp/foo/ln x y

使用此Makefile运行"make"时出现以下错误:

Running "make" with this Makefile errors out with:

make: execvp: /tmp/foo/ln: Too many levels of symbolic links

那么，您的Makefile究竟如何调用ln?您的PATH等中有什么?

So, how is your Makefile invoking ln, exactly? What is in your PATH etc.?

[更新]

我敢打赌，Makefile弄乱了您的PATH.这是一个Makefile，可再现您的确切错误消息:

I bet the Makefile is messing up your PATH. Here is a Makefile that reproduces your exact error message:

PATH=/tmp/foo

all:
    /bin/ln -nsf /tmp/foo /tmp/foo
    ln x y

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