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Re: add order-only-prerequisites example
From: |
Paul D. Smith |
Subject: |
Re: add order-only-prerequisites example |
Date: |
Mon, 30 Aug 2004 21:48:02 -0400 |
%% Dan Jacobson <address@hidden> writes:
Paul> Sometimes features are advanced enough that providing a simple
Paul> example
dj> Well still, a few-liner showing how
dj> a: b|c
dj> differs from
dj> a: b c
dj> wouldn't hurt.
True.
dj> Occasionally, however, you have a situation where you want to
dj> impose a specific ordering on the rules to be invoked _without_
dj> forcing the target to be updated if one of those rules is
dj> executed. In that case, you want to define "order-only"
dj> prerequisites.
dj> Without plenty of interspersed examples, that still will take deep
dj> concentration to understand, even more if the reader is not a native
dj> English speaker.
Undoubtedly. Order-only prerequisites are definitely an advanced
feature. I doubt most people are really able to grok them until they
run across a real-life situation where they are needed.
--
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