Distribution.PreProcess

[Simon Marlow]

On 07 December 2004 17:56, Isaac Jones wrote:

> Ross Paterson <ross at soi.city.ac.uk> writes:
>> It might be preferable not to unlit .lhs files, as all
>> implementations can handle them, and the originals are better for
>> human readers (such as Hugs users curious about their libraries). 
>> There's no real need to unlit .ly files either, though some other
>> preprocessors will need it. (And should unlit be treated as just
>> another preprocessor?) 
> 
> Yeah... should we get rid of the unlit preprocessor?
> 
>> As I understand it, preprocessing with cpp is only needed for Hugs,
>> as the compilers have -cpp flags, and will do it properly
>> themselves.  For Hugs, cpp will need a -D__HUGS__ option, plus extra
>> options that are often system-dependent (and will also be needed by
>> the compilers).  This harks back to the need to separate
>> system-dependent build parameters from the package description, and
>> provide hooks to generate and use them.
> 
> I'll try to think more about this.

Another thing to bear in mind: at some point we want to provide './setup
haddock' (or maybe './setup haddock-html', './setup haddock-docbook',
...) and unlit/CPP will be required for that.

Cheers,
	Simon