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Re: Checking application of dependencies from make rules without recipes

From: SF Markus Elfring
Subject: Re: Checking application of dependencies from make rules without recipes
Date: Wed, 21 Jun 2017 20:21:43 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0

> I don't think that's relevant: a graph's topology isn't dependent
> on the order in which its arcs are enumerated.

I have tried to stress the construction sequence.

> When you submit a test case that demonstrates a bug,

I stumbled on two special cases depending on your view of the corresponding
software situation.
I am unsure if any more evolution will happen there.

> then I'm sure someone will look at it.

Would you like to take another look at a detail from my clarification request
on the topic “Checking file generation for a test script”?

> Expressions calculating prerequisites are a notable case, causing "variables 
> before rules"
> to be one guideline for writing makefiles.

Thanks for your information.

> You claimed that the inability to cancel an explicit rule meant something 
> important

I got an acknowledgement that the handling of explicit rules is generally 
in comparison to implicit rules in specific cases.

> about whether explicit rules or implicit rules should come first.
> Paul prompted you to explain what that was, but you haven't.

I thought that I have tried this.

Now again the documented detail for an ordering constraint:
Implicit make rules can be cancelled. So it is expected that something did exist
to be switched off on concrete demand.


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