Just had a look at the linked page out of piqued curiosity. The "get started" link on the homepage points to a GitHub release page (
https://github.com/AdaPlusPlus/gcc/releases/tag/0-2-0) with a 908MB "adapp-for-linux.gz".
I'm presuming this is real (908MB would take a tad too long to download today), but if it isn't, that's definitely up there in terms of execution. I completely believe it.
Edit: Oh.