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