Angstrom follows the same procedure as Openembedded. The only difference is selecting Angstrom as the distro and selecting omapzoom2 as machine. Both of these variables can be set within the "local.conf".
 Openembedded Ubuntu system requirements
sudo apt-get install help2man gawk texi2html texinfo build-essential unzip diffstat subversion texinfo cvs
Ubuntu requires /bin/sh to point to /bin/bash rather than /bin/dash. Run the command below and select "No" from the menu.
sudo dpkg-reconfigure dash
Note: Around 35GB of hard disk space is required to build complete OE
References on OE, Angstrom, Bitbake etc can be found in Technical References page