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.

It's a very well-executed April Fool's Joke in that regard. But it's still a joke. And 0xDEEPFAC is apparently very committed to the idea that it's a real thing and not a joke. Just look at the commit dates if you have any doubt (and the fact that there haven't been any since then).

The Windows binary works, but the Linux one was rushed out. Sorry : /

its a working compiler, so why not?

It’s a glorified sed script with a forked version of GCC from April 1st. It’s a joke.

It is not? As the creator I can tell you that the parser and analyzer of GCC/GNAT were modified.

For example, supporting implicit "use" clauses for packages was a difficult problem to solve - not to mention allowing for abbreviated type names in the Standard package.