[Haskell-cafe] __GLASGOW_HASKELL__ macro in 7.2.1

JP Moresmau jpmoresmau at gmail.com
Fri Oct 14 17:44:54 CEST 2011


Thank you both, I misread that page on the versions and didn't see the
difference between minor version number and release number. So I can
confirm, my 7.0.3 install gives me 700 and my 7.2.1 gives me 702.
Everything is good. Thanks!

JP

On Fri, Oct 14, 2011 at 5:13 PM, Daniel Fischer
<daniel.is.fischer at googlemail.com> wrote:
> On Friday 14 October 2011, 16:47:45, JP Moresmau wrote:
>> Hello list,
>> I must be doing something stupid, but what?
>>
>> ghc --version
>> The Glorious Glasgow Haskell Compilation System, version 7.2.1
>>
>> ghc -E -optP-dM -cpp Main.hs (per
>> http://www.haskell.org/ghc/docs/latest/html/users_guide/options-phases.h
>> tml)
>>
>> {-# LINE 1 "Main.hs" #-}
>> #define mingw32_HOST_OS 1
>> #define i386_BUILD_ARCH 1
>> #define __GLASGOW_HASKELL__ 702
>> #define __STDC_HOSTED__ 1
>> #define i386_HOST_ARCH 1
>> #define mingw32_BUILD_OS 1
>>
>> I'm on Windows so everything else is correct except the line that
>> tells me I'm using 7.0.2.
>
> No, __GLASGOW_HASKELL__ == 702 means you're using ghc-7.2.*, not 7.0.2.
>
> The second and third digit of the version are for the second component, so
> 610 was 6.10.*, 612 was 6.12.*
>
>> Unfortunately I have code that works under 7.0.3 and breaks under
>> 7.2.1 (and the 7.2.1 code breaks under 7.0.3, of course) so I don't
>> see anything other option than conditional compilation.
>
> #in __GLASGOW_HASKELL__ >= 702
> -- code for 7.2.1 and greater
> #else
> -- code for ghc <= 7.0.4
> #endif
>
>
>



-- 
JP Moresmau
http://jpmoresmau.blogspot.com/



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