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Re: [bug #51269] Reusing data from targets for prerequisites

From: SF Markus Elfring
Subject: Re: [bug #51269] Reusing data from targets for prerequisites
Date: Tue, 20 Jun 2017 11:43:04 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0

>> Would it make sense to allow that another special syntax will denote
>> additional placeholders (similar to the handling of the percent character)?
> Take a look at
> https://www.gnu.org/software/make/manual/html_node/Static-Usage.html

Thanks for your link.

> It may enable what you want already.

The provided example looks promising.

bigoutput littleoutput : %output : text.g
        generate text.g -$* > $@

I got another software development concern for such an use case.

* Can it eventually happen that dependencies will not be resolved if target 
  do not contain the percent character?

* Should the determination of prefixes and suffixes just work here?

* Can another link help in the section “How patterns match” of the 

> Otherwise, give a specific example of what it is you can't do
> with the existing syntax.

I am also interested in data processing for several fields from targets
(and not only a single “%” as the usual placeholder).
Will it make sense to capture any more data into corresponding variables?


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