nios2-linux on DE0 (Cyclone III /EP3C16F484)

Hi,

today I wanted to try out running linux on my DE0 board [1] which I thought should be possible.

I followed the tutorial on [2] which uses also a cyclone III.

Compiling the source and so on -- using the default settings -- went quite fine, however when downloading the linux.initramfs.gz to the board I get a download error due to failed verification similar to this user here: [3]

So I tried using compiling the source with custom-fpga.h - however this fails horribly due to several missing defines :/

Can somebody perhaps help me creating a valid SOPC file which is compatible with the nios2-linux for my board?

Which components are absolutely necessary for linux to run on niosII ?

Help is really appreciated as I tried to get it working for the last few days (and creating/modifing many many systems ://)

Thanks!