TYPO3 Core

If you need to define a custom caching backend for the autoloader, you have to include you new caching backend in localconf.php. It is also required to include related interfaces and so on before but this is not possible since "require" statements are used insted of "require_once".

So i would suggest to use require_once statements for the function body "initializeCachingFramework" in config_default.php