Compiling libraries

[Artem Pelenitsyn]

Yes, in particular, this:
https://gitlab.haskell.org/ghc/head.hackage

Readme there has some documentation…

On Thu, Apr 29, 2021 at 3:19 PM Carter Schonwald <carter.schonwald at gmail.com>
wrote:

> There’s hackage head, which has some docs on the gitlab instance. Though
> I’m not up to date on how to use it.
>
> On Thu, Apr 29, 2021 at 4:24 AM Simon Peyton Jones via ghc-devs <
> ghc-devs at haskell.org> wrote:
>
>> Ben and other friends
>>
>> What is the approved way to build libraries with (and for) a compiler
>> that I’ve just built?
>>
>> I tried this:
>>
>> bash$ cabal v2-install
>> --with-ghc=/home/simonpj/code/ghc-9.2-branch/inplace/bin/ghc-stage2
>> streamly --allow-newer
>>
>> but it failed with
>>
>> Data/Primitive/Types.hs:273:844: error:
>>
>>     • Couldn't match expected type ‘Word#’ with actual type ‘Word8#’
>>
>>     • In the fourth argument of ‘shimmedSetWord8Array#’, namely ‘x#’
>>
>> (This was for a compiler built from the ghc-9.2 branch.)
>>
>> I’d like to be able to do the same for HEAD.
>>
>> I need to do this to help with the numerous tickets asking about library
>> regressions.  For example, I want to be able repoduce @harendra’s example
>> <https://gitlab.haskell.org/ghc/ghc/-/issues/19557#note_348969>, but I
>> can’t because I can’t build streamly.
>>
>> Thanks!
>>
>> Simon
>>
>>
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