Handling of international Character Sets (Unicode?)

In an NTFS-Filesystem I have some files and directories which include Greek and Arabian characters. There are no problems in Windows Explorer - it even works in FAT32, but the readdir()-function does not like those characters. It lists the directory contents including the subdirectories with greek characters, but if this directory name is subject to further operations as readdir(), stat(), -d, -s the function fails with error message: “Die Syntax f³r den Dateinamen, Verzeichnisnamen oder die Datentrõgerbezeichnung ist falsch”. The filename is printed with “?” for each character of the directory.

@Daniel-Apo sorry but that is a issue with the function and not the build & bits - a language forum would be better able to assist as opposed to our platform forum.