Agreed that it is better to preserve the input text.

Agreed that a warning is indicated, but as Stefano suggested, I think
the warning should only be given if -Wportability is enabled (which it
is by default, I gather), not unconditionally. From our manual:

       `portability'  
          Portability issues (e.g., use of `make' features that are
          known to be not portable).

which, so far as I can see, is what is being dealt with here. --thanks, karl.



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