预编译头？我们真的需要它们 [英] Precompiled Headers? Do we really need them

问题描述

很久以前，我曾经使用预编译的头文件：a。加速编译和b。因为我支持多种开发工具，如CodeWarrior，MPW，VS，ProjectBuilder，gcc，intel编译器等。

Back a long time ago I used to use pre-compiled headers: a. to speed compilation and b. because I supported multiple development tools like CodeWarrior, MPW, VS, ProjectBuilder, gcc, intel compilers, etc, etc.

现在我有一个Mac Pro与32gb的RAM。

Now I have a Mac Pro with 32gb of RAM.

现在我只使用CMake。

Now I use just CMake.

那么我们真的需要预先编译的标题吗？

So do we really need pre-compiled headers any more?

见/知道？

如何创建跨平台预编译头？也许这也会简化我的生活。

How can one make a cross-platform pre-compiled header? Maybe that would simplify my life too.

推荐答案

没有这样的东西， TDD的支持者（测试驱动的开发）将会失败，如果他们的构建需要更长的时间几秒钟，因为它使他们的开发风格的转换慢得多。

There is no such thing as a build that is "Fast enough". Proponents of TDD (Test-Driven Development) will be upset if their build takes longer than a few seconds because it makes turnaround on their development style much slower.

我曾经参与过编译时间的项目，我们通过正确的方式使用预编译的头文件减半（或更好），所以好处可以相当特别是对于那些忽视构建时间一段时间的项目。

I've worked on projects with hours of compilation time that we halved (or better) by working with pre-compiled headers the right way, so the benefit can be quite large especially for projects that have neglected build times for a while.

然而，首选的解决方案仍然是，编译时间永远不会通过控制代码的物理依赖性远远不可能。

However, the preferred solution remains that compilation times never get that far out of hand, by controlling the physical dependencies of the code.

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