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[bug #51297] Better support for escaping of function parameters

From: Markus Elfring
Subject: [bug #51297] Better support for escaping of function parameters
Date: Fri, 23 Jun 2017 06:11:03 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0


                 Summary: Better support for escaping of function parameters
                 Project: make
            Submitted by: elfring
            Submitted on: Fri 23 Jun 2017 12:11:01 PM CEST
                Severity: 3 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.2.1
        Operating System: Any
           Fixed Release: None
           Triage Status: None



The make software supports also calling functions
The handling of corresponding arguments is described a bit. A few characters
are mentioned which have got a special meaning within the language that is
used by the tool “make”.

I am also especially interested in the clarification under which circumstances
a passed text should be treated as a single argument (or it will be processed
as separate parameters as usual according to the syntax). The functionality
“word splitting” can occasionally trigger special software development
challenges <https://savannah.gnu.org/bugs/?712>.
I see a need to support safer data processing there.

* Escape a string by a corresponding function call so that it is reusable as a
single parameter.
* Provide another function call which can perform the opposite transformation
so that a value is split into smaller items.

How do you think about to add extra support for such data conversion in the
make function library?


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