> But what's the best way to manage this? Suppose you have
> several modules, some of which need no preprocessor, while others need
> to be preprocessed in different ways (ignoring multiple extensions --
> too hard). I've been doing this by using different filename extensions
> to distinguish them, plus a patched version of Hugs that can be told
> what filename extensions to accept, plus a preprocessor that uses the
> filename extensions to decide what to do. (For example, .y files could
> be sent through happy.)
The latest version of hmake (3.01) has support for calling a
preprocessor based on the filename extension, before calling the
compiler on the resulting file. Currently, it recognises:
.y Happy
.ly literate Happy
.gc GreenCard
.hsc hsc2hs
.chs C->HS
.hs.cpp C preprocessor
I'm not really sure whether the invocation magic for all of these
is correct yet, but I would encourage people to try it out and
send patches. It is pretty easy to add new preprocessors - there
are basically four options to define for each pp in addition to the
filename extension.
Regards,
Malcolm
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