datadir (was: RE: new package description fields, sdist, and preprocessors)

[Bernard Pope]

On Tue, 2005-08-09 at 09:36 +0100, Simon Marlow wrote:

> The problem, of course, is how to get the value of $datadir to the
> program if it is configurable.  I suggested a CPP symbol, but that is
> far from ideal (we don't do it this way in fptools projects any more for
> various reasons).  Another option is to have the Setup script generate a
> file containing the declarations:
> 
> -- paths.h
> prefix="/usr/local"
> bindir="bin" -- or absolute
> libdir="lib/foo-1.0/ghc-6.4"
> datadir="share/foo-1.0"
> 
> which you can then #include into Haskell source.  Another alternative,
> if you want to avoid CPP, is to have Setup generate a complete Haskell
> module with these declarations, but then you have to somehow choose an
> appropriate module name that doesn't clash.
> 
> paths.h gets my vote.  Anyone have any better ideas?

What if, say, you have some C code in your package that also wants to
know the values of these paths?

Bernie.