A development package I'd like to use is provided as Linux binaries for a single platform. I'd like to build and run it on another platform.
The manual, available on the developer's site but not included in the package, contains the following text (product/project names redacted):
Warranty and Copying * This document is part of [shortname]: * [longname] * [project url] * * [shortname] is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * [shortname] is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with [shortname]. If not, see <http://www.gnu.org/licenses/>.
This manual is slightly older than the current binary package. The developer now says “As the copyright holder, I can do what I want with my copy and updates … including changing the license … The current published binary version is not GPL”.
Is there anything I can do to suggest to the developer that their approach is not appropriate?