debuging rc12 or porting beta1 is quite the same as my final objective is to add the c3000 branch to pdaxrom-builder ... My work is mainly working on the filestructure and how the OS can boot from a non standard layout as we can't use the standard c3000 rom layout ...
pivot_root is a mechanism permitting to switch the root partition during boot, so with this method we can have a minimal rootfs image in nand flash, and use the HD as the rootfs, pivoting from one to other during boot time. This way I can get rid of symlinks and libs problems I had until now (not speaking of /home space problems which you get quickly with my first beta, home being shrinked down to 4Mb)