Dear Monks

When I develop software I normally develop it on my Linux workstation and when its finished I copy it to an operational unix system. The following code demonstrates my problem:

#! /usr/local/bin/perl -lw

use strict ;
use POSIX 'strftime' ;
$ENV{TZ} = 'GMT' ;
my $t = time() ;
print strftime("%s", localtime(int $t)) ;
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On my Linux machine this works fine (perl v5.8.8), it prints epoch seconds, however, on the unix machine (perl v5.8.7) it prints: %s

I get the impression that %s is somehow not supported (man strftime).
I've actually no idea how to solve this, so all suggestions would be very welcome!!

Thanks in advance
LuCa