use version;
 ...
sub checkPerlVer {
  my $minVer = shift;   # eg  '5.12'
  my $installVer = `perl -v|grep -E '(v[1-9.]+)'`; 

  if ($installVer =~ /\((v[\d+.]+)\)/){
    #print "match $1\n";
    my $reVer = $1;
    my $iver= version->parse($reVer);
    my $mver= version->parse($minVer);
    printf "Minimum Perl=$mver  Installed Perl=$iver \n";
    if ($mver <= $iver) {
      print "OK \n";
      return 1; #OK
    }else{
      print "NOPE\n";
      return 0; #NOT OK
    }    
    
  }else{
    print "No version found: <$installVer>\n";
    return 0;
  }
   
}