[Yhc] broken build

[Thomas Shackell]

Hi Kartik,

Unfortunately adding things to the prelude is a little more tricky than 
other modules. Indeed if at all possible I would recommend adding it to 
another module instead (perhaps your own module).

The problem is the compiler has a rather 'hacked' view of the Prelude (a 
carry-over from the nhc98 source code). This means that it doesn't quite 
generate quite the right .hi file for the Prelude. The problem you've 
most likely got is that you've generated a .hi file that is missing the
Integral instance for Prelude.Integer. The best way to solve this is to 
take the old Prelude.hi and modify it by hand to add your new 
definitions. This is a little fiddly but the syntax should be fairly 
obvious by looking at other examples.

Alternatively if you add your functions to some module other than the 
Prelude then you don't get any of these problems at all and it all works 
as expected.

Hope that helps



Tom