Gentoo Development Guide
Licenses
All ebuilds must specify a LICENSE (note the American English
spelling) variable. The value of this variable must be the name of a
file in the Portage tree's licenses/ directory.
If the application is multi-license (either of several licenses can be used) then use the following syntax:
LICENSE="|| ( foo bar )"
Adding New Licenses
If your package's license is not already in the tree, you must add the license before committing the package. When adding the license, use a plain text file if at all possible. Some licenses are PDF files rather than plain text — this should only be done if we are legally required to do so.
It is not normally necessary to mail the gentoo-dev list before
adding a new license. You should only do so if the license could be
considered 'questionable' or if you are unsure as to the meaning of
any part of it.
