This slightly improved ebuild adds a "demo" USE flag to select between shareware and full versions. In case the full version is selected, a trivial patch is applied to the source code before compilation. Depending on the flag, proper messages are displayed to inform the user.
Created attachment 119156 [details] rott-1.0.ebuild
Created attachment 119158 [details, diff] files/rott-1.0-not-shareware.patch
Thanks.