ghc 9.0.1

[lukel97]

Created with brew bump-formula-pr.

resource blocks may require updates.

[carlocab]

Thanks, @bubba. You need to update the binary resource block.

[carlocab]

FYI, you used the wrong URL: https://downloads.haskell.org/~ghc/9.0.1/ghc-9.0.1-x86_64-apple-darwin.tar.xz

The URL you should've used was https://downloads.haskell.org/~ghc/9.0.1/ghc-9.0.1-src.tar.xz

I've fixed that for you.

[fishtreesugar]

According to the GHC 9.0 migration guide:

ghc-bignum package replaces both integer-gmp and integer-simple.

do we still need to depend on gmp?

[carlocab]

I guess not, but we also have the issue of ghc 9.0 not being compatible with Homebrew cabal-install: https://www.haskell.org/ghc/download_ghc_9_0_1.html

I think we may need to have a separate ghc@8.10 formula first, and everything that needs cabal-install (which must be all the formulae that use ghc...) should depend on that.

[carlocab]

@fishtreesugar, is ghc-bignum packaged as part of the source tarball? Can we just get rid of the gmp resource here, or would the formula need additional changes?

[fishtreesugar]

is ghc-bignum packaged as part of the source tarball?

Yes.

Can we just get rid of the gmp resource here, or would the formula need additional changes?

Maybe we can add a build option to let users decide which bignum backend to use.

reference: https://github.com/ghc/ghc/blob/ghc-9.0/libraries/ghc-bignum/GMP.rst

[carlocab]

Maybe we can add a build option to let users decide which bignum backend to use.

We don't do build options in homebrew/core. We'll have to pick one for the formula.

[fishtreesugar]

We don't do build options in homebrew/core. We'll have to pick one for the formula.

Ok, we can respect ghc's default option (native backend) which did not depend on gmp.

[carlocab]

Merged in #70817.