Compiling libraries

[Simon Peyton Jones via ghc-devs]

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, but I 
can't because I can't build streamly.
Thanks!
Simon

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Re: Compiling libraries

[Carter Schonwald]

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@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
> , but I
> can’t because I can’t build streamly.
>
> Thanks!
>
> Simon
>
>
> ___
> ghc-devs mailing list
> ghc-devs@haskell.org
> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>
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Re: 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 
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@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
>> , but I
>> can’t because I can’t build streamly.
>>
>> Thanks!
>>
>> Simon
>>
>>
>> ___
>> ghc-devs mailing list
>> ghc-devs@haskell.org
>> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>>
> ___
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> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
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Re: Compiling libraries

[Carter Schonwald]

Thanks for pulling that up! I was doing errands away from my desktop all
day

On Thu, Apr 29, 2021 at 5:43 PM Artem Pelenitsyn 
wrote:

> 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.schonw...@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@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 ,
>>> but I can’t because I can’t build streamly.
>>>
>>> Thanks!
>>>
>>> Simon
>>>
>>>
>>> ___
>>> ghc-devs mailing list
>>> ghc-devs@haskell.org
>>> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>>>
>> ___
>> ghc-devs mailing list
>> ghc-devs@haskell.org
>> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>>
>
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Re: Compiling libraries

[Ben Gamari]

Simon Peyton Jones via ghc-devs  writes:

> 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#'

As noted by others, we maintain head.hackage for precisely this reason.
It's not perfect, but I use it regularly to build Hackage packages with
pre-releases.

I have a draft blog post (which sadly has run into technical challenges
which have prevented publishing) which describes usage [1].

Cheers,

- Ben


[1] https://gitlab.haskell.org/ghc/homepage/-/merge_requests/29


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