No. LICENSE="GPL-2 some-exception" suffices. That said, we suck at our 
licensing information badly. E.g. every single ebuild linking against OpenSSL 
has (or at least needs to have) a linking exeption. We don't flag this 
anywhere. More important, what's with optional dependencies!? We don't 
support 

LICENSE="GPL-2 ssl? ( openssl-exception)"

style LICENSE content at all iirc. Similar for all the patent-encumbered 
multimedia libs, which can't be distributed as binaries, but are not blocked 
by some bindist feature flag or so.


Carsten