i don't know what happened, after 7 hours it's still compiling for the base-image, note i downloaded the prebuilt toolchain to save time(which could be a few hours I guess)... this just takes too long on my core2duo 3GB ubuntu.
first time build needs download lots of packages, it's better to make a tarball for the release, that should save some download time, but still, the process is too long.