[darcs-devel] building darcsden

[Benjamin Franksen]

Hi Guillaume

I did not realize that your message referred to the problem with
mime-string. I solved that by adding

import Prelude hiding (most Applicative operators)

in a number of modules. I have not tried yet if that works with ghc
versions later than 7.10.

BTW, I see no difference between mime-string-0.4 and your version:

franksen at tiber: ~/src/darcsden > cabal unpack mime-string
Warning: The package list for 'hackage.haskell.org' is 20 days old.
Run 'cabal update' to get the latest list of available packages.
Downloading mime-string-0.4...
Unpacking to mime-string-0.4/
franksen at tiber: ~/src/darcsden > darcs clone
https://hub.darcs.net/gh/darcsden
Copying patches, to get lazy repository hit ctrl-C...
^CUsing lazy repository.
Finished cloning.
franksen at tiber: ~/src/darcsden > diff -r mime-string mime-string-0.4
Only in mime-string: _darcs

Cheers
Ben

On 10/02/2017 09:43 AM, Ben Franksen wrote:
> Am 02.10.2017 um 02:14 schrieb Guillaume Hoffmann:
>> Sorry, indeed on my machine I only tried with GHC 8.2 .
>>
>> Maybe we should talk with Simon about whether it makes sense to
>> support GHC 7.10.
> 
> I don't want to accidentally break builds in darcs, which is why I
> always use the oldest version of ghc that darcs builds with, in this
> case ghc-7.10. It would be pretty inconvenient for me if I had to switch
> to a newer ghc in order to test whether darcsden still builds against my
> experimental changes in darcs. So I think it makes sense for darcsden to
> support the same range of ghc versions as darcs does.
> 
> And it does, actually: ghc-7.10 works just fine with the small change in
> darcs/Setup.hs (see my other mail in this thread) and that is probably
> only needed because I build darcsden together with darcs as a cabal
> project. Note that this is not yet a stable feature of cabal.
> 
>> Are ther eany dependencies that force us to comply
>> with this constraint?
> 
> Not sure what you mean here.
> 
> Cheers
> Ben
> 
>> 2017-10-01 18:53 GMT-03:00 Ben Franksen <ben.franksen at online.de>:
>>> Am 01.10.2017 um 21:48 schrieb Guillaume Hoffmann:
>>>> I am still waitinh for Ian Lynagh's authorizatino to add me as an
>>>> author of the mime-string package on Hackage's, meanwhile the
>>>> compilable code of mime-string is at:
>>>>
>>>> https://hub.darcs.net/gh/mime-string
>>>
>>> This does not compile with ghc-7.10.3, I get several errors like this one:
>>>
>>> Codec/MIME/String/Internal/ABNF.hs:134:22:
>>>     Ambiguous occurrence ‘<$>’
>>>     It could refer to either ‘Codec.MIME.String.Internal.ABNF.<$>’,
>>>                              defined at
>>> Codec/MIME/String/Internal/ABNF.hs:137:3
>>>                           or ‘Prelude.<$>’,
>>>                              imported from ‘Prelude’ at
>>> Codec/MIME/String/Internal/ABNF.hs:2:8-38
>>>                              (and originally defined in ‘Data.Functor’)
>>>
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> 
> 
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