[Haskell] -compiler-options vs {#-LANGUAGE Flags-#}

[Lennart Kolmodin]

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S. Alexander Jacobson wrote:
> I think the LANGUAGE pragma is better than the OPTIONS_GHC pragma but I
> am relatively indifferent on that issue. My only point is that module
> authors should put this information in the module source rather than in
> the build system.

I think the LANGUAGE pragma is much better than OPTIONS_GHC, for several
reasons.

* It's compiler independent.
* It's clear that you're only adding extensions, not any random compiler
flag.
* It plays nicely with Ian's proposal on
http://article.gmane.org/gmane.comp.lang.haskell.cabal.devel/464

Alexander, I've added LANGUAGE pragmas to binary, let me know how it
works out for you.

Cheers,
  Lennart Kolmodin
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