On Tue, 2012-01-17 at 15:35 +0400, Eugene Kirpichov wrote:

Hi,

I'm fixing a build error in a package that depends on the RTS API, which changed in 7.4, using #if __GLASGOW_HASKELL__ >= 740.

However, build log shows that __GLASGOW_HASKELL__ is still 704, not 740 as I'd expect.

Is this a bug?

I don't think so. I recently came across [1]: ''' Stable Releases Stable branches are numbered x.y, where y is even. Releases on the stable branch x.y are numbered x.y.z, where z (>= 1) is the patchlevel number. Patchlevels are bug-fix releases only, and never change the programmer interface to any system-supplied code. However, if you install a new patchlevel over an old one you will need to recompile any code that was compiled against the old libraries. The value of __GLASGOW_HASKELL__ (see Section 4.11.3, “Options affecting the C pre-processor”) for a major release x.y.z is the integer xyy (if y is a single digit, then a leading zero is added, so for example in version 6.8.2 of GHC we would have __GLASGOW_HASKELL__==608). ''' As such, release 7.4.0 would yield __GLASGOW_HASKELL__ 704. Nicolas [1] http://www.haskell.org/ghc/docs/7.0.4/html/users_guide/version-numbering.htm...