Add GHC 9.2 support

[martijnbastiaan]

TODO:

• Clean up
• Split commits
• Fix warnings / errors on CI
  • Nix
  • 8.6
  • 8.10
  • 9.0
  • 9.2

[martijnbastiaan]

@cchalmers How do you feel about removing support for 8.6? I broke something in the upgrade process, and my local installation keeps throwing GHC panics making it hard to debug. I'd rather drop it than putting more energy in..

[cchalmers]

We're still using 8.6 so I'd like to keep supporting that 😅. I'll take a look later and see if I can get it working.

[martijnbastiaan]

Oof 😅. There has been some talk about dropping 8.6 support for Clash after releasing 1.8 btw, so hopefully that doesn't mess you guys up too much.

I'll take a look later and see if I can get it working.

Thanks! I'll see if I can get my local GHC installation to comply too.

[cchalmers]

I think this is the cause of the issue:

{-# LANGUAGE CPP            #-}
#if __GLASGOW_HASKELL__ <= 902
{-# LANGUAGE Arrows            #-}
#endif

I think fixes it for me. I'll try to test it on our codebase to see if there's any other issues.

[martijnbastiaan]

Any news on this?

[cchalmers]

I set off a build and then forgot about it. That one failed because there were other changes since and we weren't up to date. I've set off another build with a fix, hopefully I won't forget about this one.

[cchalmers]

Merged #15 instead, a rebased version of this.