R-beta: perl warnings during make

[Bill Simpson]

During the make of the current intermediate patch R-release, 
I get numerous warnings like this:

data                              text    html    latex
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LC_ALL = (unset),
        LC_CTYPE = "iso-8859-1",
        LANG = (unset)
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

I never had this happen before.  What has happened, and how to fix?
Thanks very much for any help.
(Apparently I need to make some locale settings but I have no idea what
that means nor how to do it.  I am running Slackware 3.4.0)

Bill Simpson

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