Dear Lukas, Ceci and I have been following her troubles through private emails for a while so i decided not to discuss the same topics in here. Anyhow, @Ceci, as I already share with you it seems to me that you might not be using the right cross-compiler. Your situations sounds weird. First time that I heard about it. Several users have confirmed that the process detailed here<https://github.com/vmayoral/beagle-ros>worked for them.
Do you have more information that can help us understand your issue?