How do I build GHC 7.6 from source?

Simon Marlow marlowsd at
Thu Sep 20 16:20:34 CEST 2012

On 19/09/2012 02:15, Iavor Diatchki wrote:

>   > exactly what git's submodule machinery does, so it seems pointless to
>      > implement the functionality which is already there with a standard
>      > interface.  Thoughts?
> I have seen this.  Our custom "fingerprint" solution has the exact same
> drawbacks (because it does the exact same thing as sub-modules), and in
> addition it has the drawback of
>    1. being a custom non-standard solution,
>    2. it is not obvious where to find the "fingerprint" associated with
> a particular branch (which is what lead to my question in the first place).

Well, it doesn't quite have the same drawbacks as submodules, because 
our solution places a burden only on someone who wants to recover a 
particular repository state, rather than on everyone doing development.

I think it's worth keeping an eye on submodules in case they fix the 
gotchas in the UI, but at the moment it looks like we'd have a lot of 
confused developers, lost work and accidental breakages due to people 
not understanding how submodules work or forgetting to jump through the 
correct hoops.

I'm not saying fingerprints are a good solution, obviously they only 
solve a part of the problem, but the current tooling for submodules 
leaves a lot to be desired.


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