[Haskell-cafe] --disable-{executable-}profiling cabal-install-1.22.0.0 with ghc-7.6.3

[Johan Tibell]

Chatted a bit with Duncan. cabal-install needs to be prepared to handle
calling older Cabal lib versions. In this case cabal-install needs to check
which Cabal install version was used (or rather, which of the available
versions it wants to use) and then call the setup executable correctly (in
this case not passing --disable-profiling to older Cabals, but instead
using the old flag.)

On Tue, Jan 13, 2015 at 6:31 AM, Johan Tibell <johan.tibell at gmail.com>
wrote:

>
>
> On Tue, Jan 13, 2015 at 6:26 AM, Ozgur Akgun <ozgurakgun at gmail.com> wrote:
>
>>
>> On 13 January 2015 at 13:59, Johan Tibell <johan.tibell at gmail.com> wrote:
>>
>>> I wonder if you have a cached Setup.hs somewhere under ~/.cabal that's
>>> out of date (i.e. uses and older Cabal). You can try -v2 or -v3 to get some
>>> more information. In particular look for mentions of older Cabal versions.
>>>
>>
>> This is probably it. With -v3 I see the following in the output.
>>
>> Using Cabal library version 1.20.0.0
>> Found cached setup executable:
>>
>> $HOME/.cabal/setup-exe-cache/setup-Simple-Cabal-1.20.0.0-x86_64-osx-ghc-7.6.3
>>
>> $HOME/.cabal/setup-exe-cache/setup-Simple-Cabal-1.20.0.0-x86_64-osx-ghc-7.6.3
>>
>> Then I rm -rf $HOME/.cabal/setup-exe-cache, but this doesn't seem to
>> help.
>>
>> Using Cabal library version 1.20.0.0
>> Setup executable not found in the cache.
>> Setup executable needs to be updated, compiling...
>>
>> So it compiles the Setup executable using Cabal-1.20.0.0 again.
>>
>> And now I know why this happens. I had compiled cabal-install using
>> ghc-7.8.3 before. So 7.6.3 doesn't even have Cabal-1.22.0.0 available to
>> it. Compiling cabal-install with ghc-7.6.3 seems to have solved that
>> problem.
>>
>> This is getting a little bit out of hand though, especially for
>> automation. Now I need to figure out what to do for our continuous
>> integration machines so the latest version of cabal-install is useable for
>> multiple ghc versions. In general, should we be compiling cabal-install
>> with each ghc installation separately? Or maybe just the Cabal library?
>>
>> Thanks,
>>
>> --
>> Ozgur Akgun
>>
>
>
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