[ANNOUNCE] GHC 8.4.1-alpha2 available

[George Colpitts]

installed fine on my mac
primitive can now be compiled
unordered-containers does not compile, even with allow-new. This has been
reported by Neil Mitchell
haskell-src-exts does not compile, not clear where to report this

On Sun, Jan 21, 2018 at 4:15 PM Ben Gamari <ben at well-typed.com> wrote:

>
> The GHC development team is pleased to announce the second alpha release
> of the 8.4.1 release. The usual release artifacts are available from
>
>     https://downloads.haskell.org/~ghc/8.4.1-alpha2
>
> Note that this alpha, like alpha1, is unfortunately afflicted by #14678.
> We will try to get an alpha3 out as soon as this issue has been resolved.
> However, as this alpha has a number of fixes since alpha1, we have
> decided it would be best not to delay it any further.
>
> Also, due to user demand we now offer a binary distribution for 64-bit
> Fedora 27; this distribution links against ncurses6. This is in contrast
> to the Debian 8 distribution, which links against ncurses5. Users of
> newer distributions (Fedora 27, Debian sid) should use this distribution.
>
> Note that this release drops compatibility with GCC 4.6 and earlier.
> While we generally try to place as few constraints on system toolchain
> as possible, this release depends upon the __atomic__ builtins provided
> by GCC 4.7 and later (see #14244).
>
>
> === Notes on release scheduling ===
>
> The 8.4.1 release marks the first release where GHC will be adhering to
> its new, higher-cadence release schedule [1]. Under this new scheme,
> major releases will be made in 6-month intervals with interstitial minor
> releases as necessary.
>
> In order to minimize the likelihood of schedule slippage and to ensure
> adequate testing, each major release will be preceeded by a number of
> regular alpha releases. We will begin issuing these releases roughly
> three months before the final date of the major release and will issue
> roughly one every two weeks during this period. This high release
> cadence will allow us to quickly get fixes in to users hands and allow
> better feedback on the status of the release.
>
> GHC 8.4 is slated to be released in mid-February but, due to technical
> constraints, we are starting the alpha-release cycle a bit later than
> planned under the above schedule. For this reason, it would be greatly
> appreciated if users could put this alpha through its paces to make up
> for lost time.
>
> As always, do let us know if you encounter any trouble in the course of
> testing. Thanks for your help!
>
> Cheers,
>
> - Ben
>
>
> [1] https://ghc.haskell.org/trac/ghc/blog/2017-release-schedule
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