什么-j4值用于调用make? [英] what -j4 value is used to invoke make?

问题描述

如何从一条make规则中找出make -j参数的值是什么?是否有类似环境变量的内容?例如，如果我运行:

How can I figure out, from a make rule, what is the value of the make -j argument ? Is there something like an environment variable ? For instance if I run:

make -j4 something

我希望something规则显示4. GNU make手册页建议在父make与其可能用于提取此信息的孩子.但是如何?

I would like the something rule to display 4. The GNU make manual page suggests communication between the parent make and its children which could probably be used to extract this information. But how ?

推荐答案

事实证明，这实际上并不容易.

Turns out this isn't at all easy actually.

John Graham-Cunning写了一篇有关它的完整博客文章此处.

John Graham-Cunning wrote an entire blog post about it here.

这篇关于什么-j4值用于调用make?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！