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Re: Idea of triggering bugs in users' Makefiles
From: |
Sergei Trofimovich |
Subject: |
Re: Idea of triggering bugs in users' Makefiles |
Date: |
Fri, 4 Feb 2022 18:36:39 +0000 |
On Fri, 04 Feb 2022 10:27:01 -0500
Paul Smith <psmith@gnu.org> wrote:
> On Fri, 2022-02-04 at 09:13 +0000, Sergei Trofimovich wrote:
> > 1. Enable parallel builds by GNU make by default
> >
> > 2. Do not run dependencies in deterministic order by default:
>
> GNU make (unlike Ninja) is bound by the POSIX standard in terms of its
> behaviors. The POSIX standard makes very clear the way in which make
> operates on prerequisites and neither of these changes are conforming
> to the standard.
>
> So, it's not possible to modify the default behavior of GNU make in
> these ways. Not to mention that GNU make is also a foundational
> component of hundreds of thousands of build systems and changes that
> would cause a large number of them to break isn't acceptable, even in
> pursuit of a good cause.
Sounds good.
> The idea of having a non-deterministic order of prerequisite builds is
> something others have suggested but no one has implemented. Of course
> it would not be possible to move the first prerequisite as that one is
> special but randomly rearranging the rest of them could be done. This
> would require an option to enable of course; it could not be the
> default behavior.
Thank you!
--
Sergei