cpp symbol __GLASGOW_HASKELL__ doesn't reflect version number

[josef]

I've just installed ghc 7.4.1 and it seems to get the value of the GLASGOW_HASKELL variable wrong:

Load the program below in ghci and run main. I get "704" as output.

{-# OPTIONS_GHC -cpp #-}
module Main where

#if __GLASGOW_HASKELL__ == 704
main = putStrLn "704"
#else
main = putStrLn "something else"
#endif

[dterei]

This is correct. The GLASGOW_HASKELL variable reflects the major & minor number, it does not include the revision number.

e.g GHC is versioned in the standard three number system of major.minor.revision.

6.12.3 => 612
7.0.3 => 700
7.2.1 => 702
7.2.2 => 702
7.4.1 => 704
..
7.10.2 => 710