#!/usr/local/bin/perl
use IO::Compress::Gzip qw( $GzipError );
use strict ;
use warnings ;
die "Usage: gzappend gz-file file...\n"
    unless @ARGV ;
my $output = shift @ARGV ;
@ARGV = '-' unless @ARGV ;
my $gz = new IO::Compress::Gzip $output, Merge => 1
     or die "Cannot open $output: $GzipError\n" ;
$gz->write( [@ARGV] )
     or die "Cannot open $output: $GzipError\n" ;
$gz->close;