TYPO3: Predefine PATH_tslib

if (@is_dir(PATH_site.'typo3/sysext/cms/tslib/')) {
    define('PATH_tslib', PATH_site.'typo3/sysext/cms/tslib/');
} elseif (@is_dir(PATH_site.'tslib/')) {
    define('PATH_tslib', PATH_site.'tslib/');
} else {

    // define path to tslib/ here:
    $configured_tslib_path = '';

    // example:
    // $configured_tslib_path = '/var/www/mysite/typo3/sysext/cms/tslib/';

    define('PATH_tslib', $configured_tslib_path);
}
if (PATH_tslib=='') {
    die('Cannot find tslib/. Please set path by defining $configured_tslib_path in '.basename(PATH_thisScript).'.');
}