[Haskell-cafe] Specify OS version

[Sergey Bushnyak]

Usually, I'm using technique described here 
http://blog.haskell-exists.com/yuras/posts/stop-abusing-cpp-in-haskell.html
by using `extra-source-dir` key in cabal file and splitting implementation.

On 04/01/2015 05:56 PM, Aldo Davide wrote:
> I don't see how you can avoid CPP. Even if cabal supported checking the OS version, you would still probably need CPP.
>   
>   
>
> Sent: Wednesday, April 01, 2015 at 10:40 AM
> From: "Sergey Bushnyak" <sergey.bushnyak at sigrlami.eu>
> To: haskell-cafe at haskell.org
> Subject: [Haskell-cafe] Specify OS version
>
> Hi Cafe!
> I have program written in Haskell and Swift that runs on Mac. This program uses some features that was introduced in last version of OS X “Yosemite” 10.10, but some of my users use previous version "Maverics " 10.9. Is there some technique that allows me to extend my cabal file and specify which *version* of os is currently in use and don't load some of modules?
> AFAIK, Cabal's `conditional` doesn't provide such mechanism, but something like
> ```
> if os(osx) && ver(=10.10)
> if os(osx) && ver(<=10.9)
> ```
> will be nice.
>
> Maybe there is other approach to this problem?I don't want to use `CPP` extension to handle this within code.
> Thanks
> --
> Best regards,
> Sergey Bushnyak _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe at haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe

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