lang/ghc: remove ghc-8.4.x support on arm

[mikael]

Summary

llvm50 is deprecated and will be removed on 2019-04-30

fetch http://mikael.urankar.free.fr/FreeBSD/ghc/ghc-8.6.3-boot-aarch64-freebsd.tar.xz
fetch http://mikael.urankar.free.fr/FreeBSD/ghc/ghc-8.6.3-boot-armv6-freebsd.tar.xz
fetch http://mikael.urankar.free.fr/FreeBSD/ghc/ghc-8.6.3-boot-armv7-freebsd.tar.xz

[tcberner]

lang/ghc/bsd.ghc.mk

101 ↗

(On Diff #55486)

Would it be possible to go with LLVM_DEFAULT? Or is it too dependent on a certain version?

[mikael]

lang/ghc/bsd.ghc.mk

101 ↗

(On Diff #55486)

Unfortunately it's impossible, see https://gitlab.haskell.org/ghc/ghc/wikis/improved-llvm-backend for details

and also :
https://gitlab.haskell.org/ghc/ghc/blob/ghc-8.4.3-release/configure.ac#L637
https://gitlab.haskell.org/ghc/ghc/blob/ghc-8.6.4-release/configure.ac#L647

[brooks]

We can certainly delay removal if this is a significant loss. I didn't see this one since it's hard to see dependencies on platforms I don't run.

[arrowd]

@mikael.urankar_gmail.com Why didn't you update distinfo for lang/ghc862?

[mikael]

In D19722#422692, @brooks wrote:

We can certainly delay removal if this is a significant loss. I didn't see this one since it's hard to see dependencies on platforms I don't run.

It's not a loss, the 8.6 branch works fine on arm.

[mikael]

In D19722#422885, @arrowd wrote:

@mikael.urankar_gmail.com Why didn't you update distinfo for lang/ghc862?

I just forgot to update this version.

[arrowd]

[tcberner]

@arrowd ship it