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Re: reverse dependency order?

From: Tim Landscheidt
Subject: Re: reverse dependency order?
Date: Wed, 18 May 2016 04:02:37 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Dan Nicolaescu <address@hidden> wrote some time ago:

> I've run into situations where given:

> foo: a b c

> and "b" was missing a dependency on "a".

> The above did not fail with parallel make for years because "a" finished
> fast, before "b" actually needed to use it's result.

> It might be interesting to have a make flag that would reverse the order
> in which dependencies are considered, this will catch really fast
> missing dependencies even when building with "make -j1".

> Is something like that feasible?  Would it be easy to implement?

I asked that exact question in 2012
and even then there had already been requests for that "in
the past" :-).  I wrote a basic patch to reverse or random-
ize the order
but I don't think it applies cleanly anymore.


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