I was unsure on whether to put this on Superuser or Stack Overflow, but I opted for here because it concerns software development regarding the Gosu programming language.
The Gosu programming language requires Java 8 and does not accept Java 11 or higher versions of the JDK/JRE (not sure which one is relevant). This is a problem because I have Java 11 and the development team has let this issue linger for a long time. It's on the bug tracker and nobody has done anything about it for a long time.
I need to set up a development environment with Java 8 and Java 11, install Gosu in the environment with Java 8, and then figure out how to modify the source code of Gosu so that it's compatible with Java 11. Is there any guidance from people who did development and project forking similar to this?
Regarding Gosu and Java 11, Gosu's latest release 1.15.0 supports Java 11 exclusively.