[Haskell-cafe] How to use cabal macros in .hsc files

Henning Thielemann schlepptop at henning-thielemann.de
Thu Aug 11 18:14:54 CEST 2011

On 08.08.2011 12:08, Bas van Dijk wrote:
> Hello,
> Currently it's not possible to use cabal macros like
> MIN_VERSION_base(x,y,z) in .hsc files:
> http://hackage.haskell.org/trac/hackage/ticket/870
> Is there a workaround to get the same effect?

Writing a plain Haskell module that contains the code that depends on 
the particular base-version?

Usually I try to stay away from this preprocessor hackery, and this case 
seems to support my attempts. What I do is to add Hs-Source-Dirs 
depending on some Cabal flag, and connect it with a field like 
Build-Depends: base==3.*.


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