I attempted to emerge openoffice-bin (2.4.1, I checked and 3.0.0* doesn't either, but I don't know if they use rpms for packaging), and got rather cryptic error messages (premature end of cpio archive, not a bzip2 file, etc), but the unpack "succeeded"; install failed when it couldn't find any .desktop files.
It turns out that I needed to install rpm (<5.0.0, according to one bug, but i didn't have ANY version of rpm)..
Shouldn't the openoffice-bin packages depend on rpm?
Expected Behaviour: openoffice-bin pulls in rpm and installs correctly.
Observed Behaviour: openoffice-bin fails to install with cryptic error messages and never claims that rpm was not found.
It doesn't. The ebuild inherits rpm.eclass, which uses rpm2targz to unpack the rpm's. Please provide `emerge --info` and the cryptic output and reopen.
This was caused by #235290. Sorry for the alarm!