Build GHC in GHC2021

[Richard Eisenberg]

I think this is an excellent idea! So excellent, that we've already done it. :)

When I try to compile with GHC 9.6.2 (what I have lying around), GHC2021 is in effect.

Is there something different you were thinking of?

Thanks,
Richard

> On Dec 7, 2023, at 4:39 AM, Arnaud Spiwack <arnaud.spiwack at tweag.io> wrote:
> 
> Dear GHC devs,
> 
> Year 2024 is upon us. GHC2021 was released 2 years ago, in GHC 9.2. I think it's time for the base language for GHC to be GHC2021.
> 
> What do we think?
> 
> PS: I don't actually know where the base language for GHC is specified. I couldn't find it with a cursory search
> PPS: if someone makes an MR, bonus points for clearing up hundreds of lines of now-unnecessary extension on top of files.
> 
> -- 
> Arnaud Spiwack
> Director, Research at https://moduscreate.com <https://moduscreate.com/> and https://tweag.io <https://tweag.io/>.
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