[darcs-devel] building darcsden

[Ben Franksen]

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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