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Re: global .EXTRA_PREREQS not quite right...

From: Christof Warlich
Subject: Re: global .EXTRA_PREREQS not quite right...
Date: Tue, 15 Jun 2021 07:43:27 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

Hi Britton,

As it is it easily creates a bunch of circular dependencies that
require the user to manually specify target-local .EXTRA_PREREQS
for a bunch of targets to avoid.

please bear in mind that .EXTRA_PREREQS where initially "invented" to be
used as target-specific variable: Consider the use-case given in the
related section of the manual. Its natural extension as a global
variable may not be of much use.

Maybe a reasonable solution is obvious to somebody?

I think the very first step for a decent solution of that issue would be
to come up with a compelling use-case for global .EXTRA_PREREQS. Having
such a use-case would set the base to discuss measures to make this
use-case more usable.

Without such a use-case, the best I could thing of up until now would
simply be to surpress the related warning.

Hope this helps,


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