[VPM] TIP: fixing a common Perl 5.8 problem on Mac OS X

Darren Duncan darren at DarrenDuncan.net
Sat Feb 7 00:47:14 CST 2004

Hello.  This is a tip for any of you who have run into a certain annoying 
warning that some Perl installs give off every time they are run, and you 
don't know how to stop it.  I recently had this problem and didn't know 
how to solve it either, until now.  Specifically, Perl says something like 

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LC_ALL = (unset),
        LANG = "en_US"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Perl still continues to do its work as usual, but it is noisy.  From my 
searches on the internet, I found that many people had complained about 
this problem, some going back to 1998 or so, and it occurred on many 
different platforms.  A significant number of postings dealt with Mac OS 
X, and I eventually found a solution among them.

This is the message thread I found with the solution:


What you need to do is edit or create the following file:




It should look like this on the inside:

<?xml version="1.0" encoding="UTF-8"?>
<plist version="0.9">

Note that, in my situation, neither the file nor the ".MacOSX" folder 
existed yet, so I had to create both.  The text file has Unix line breaks.  
The above details in the file came from the posted solution online, so 
some details like the plist version or the DTD url don't necessarily have 
to be the same, and the file can have additional content.  When creating 
the ".MacOSX" directory, you will have to use the command line, since the 
Finder won't let you.  But you can open said folder in the Finder after it 
is made and use it to put the file there if you want.

After you add this file, log out and then log in again.  When running 
Perl, the problem has gone away.

As a bit of background, I had started off with a Mac OS X 10.2.6 system 
and a built from source copy of Perl 5.8.1rc4; this I had a week ago and 
it all worked well.  I started encountering the above problem after doing 
a fresh install of 10.2.8, but left the Perl the same (it was on a 
different partition); the Perl still ran except for that warning.  
Thinking perhaps that my Perl may have become damaged, and before I did 
the online search, I installed Perl 5.8.3, from source, but it gave the 
same warning.  Note that, throughout this whole time, the Perl 5.6.0 that 
came with the operating system never gave the warning once.

I hope this has helped someone.  Note that I have never seen mention of it 
on these lists before.

-- Darren Duncan

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