cabal-install and executable dependencies

[Herbert Valerio Riedel]

Hi,

On 2013-08-26 at 12:03:06 +0200, harry wrote:
> John Lato-2 wrote
>>> I'd forgotten about build-tools. Does it actually do anything?
>> 
>> It checks that the executable is available on the current path, and that
>> it's within the given version bounds.  I think that's all it does.
>
> How can it check an executable's version?

see

https://github.com/haskell/cabal/blob/master/Cabal/Distribution/Simple/Program/Builtin.hs

cheers,
  hvr