[Haskell-cafe] Re: How to make cabal pass flags to happy?

[Thomas Schilling]

You probably want to customise Setup.lhs to use defaultMainWithHooks
and add your own custom suffix handler to the UserHooks, see:

http://hackage.haskell.org/packages/archive/Cabal/1.8.0.6/doc/html/Distribution-Simple.html#t:UserHooks

Take a look at PPSuffixHandler
(http://hackage.haskell.org/packages/archive/Cabal/1.8.0.6/doc/html/Distribution-Simple-PreProcess.html#t:PPSuffixHandler)
and see the source code for ppHappy to get started

I'm CC'ing Duncan, in case he has a better idea.

On 13 October 2010 19:44, Niklas Broberg <niklas.broberg at gmail.com> wrote:
> On Fri, Oct 8, 2010 at 4:55 PM, Niklas Broberg <niklas.broberg at gmail.com> wrote:
>> Hi all,
>>
>> I want to do something I thought would be quite simple, but try as I
>> might I can't find neither information nor examples on how to achieve
>> it.
>>
>> What I want specifically is to have happy produce a GLR parser from my
>> .ly file, and I want this to happen during 'cabal install'. Which in
>> turn means I want cabal to pass the "--glr" flag to happy during
>> setup. My best guess is that I might want to use 'ppHappy' [1], or
>> something in the vicinity, but there's no documentation for the
>> combinator and it's far from obvious how to pass arguments to it.
>>
>> ... help? :-)
>
> ... anyone? ... please? :-)
>
> Cheers,
>
> /Niklas
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