[gsnedders]

In the latest GCC releases, -Wunreachable-code has been removed (the option still exists but is silently ignored for compat with existing Makefiles), as its output varied so much between releases (depending on what got optimized away).

[acdha]

I'd hope after this someone brings it back in some form – it's an incredibly useful tool and a diversity of implementations would be great for security-critical code.