Instances and DoCon

Simon Marlow marlowsd at
Tue Sep 23 14:10:52 EDT 2008

Serge D. Mechveliani wrote:
> On Fri, Sep 19, 2008 at 08:17:12PM +0100, Ian Lynagh wrote:
>> On Tue, Sep 16, 2008 at 10:44:53AM +0100, Simon Peyton-Jones wrote:
>>> |
>>> | And still ghc-6.8.3 builds itself from source.
>>> I have no idea how -- Happy has been needed for some time.  Maybe someone else does.
>> It's not meant to be needed for building from a source tarball.
>> This should be fixed now.
> Dear GHC team,
> can you, please, provide such GHC source distributives which require 
> possibly smaller set of programs for the user to separately pre-install?
> For example, do not require of the user to install Alex, Happy and Cabal.

GHC source distributions do not require Alex, Happy or Cabal in order to 
build.  If you find one of these is a dependency, then it is a bug - 
please report it.

Note that when building from the development sources (darcs repository), 
you *do* need more dependencies, but a source distribution is different.

Also, as Jason said - this is normally not an issue as few people need 
to build GHC from source in order to just use it.


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