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Revision as of 06:30, 1 February 2011 by Petersen (talk | contribs) (Detailed Description)

GHC 7.0


The newest major version of the Glasgow Haskell Compiler (ghc) version 7.0.1 was released 16 November 2010. It has many new features, including a new I/O manager, new type-checker, new improved parallel garbage collector, and support for a new LLVM compilation backend.


Current status

  • Targeted release: Fedora 15
  • Last updated: 1 Feb 2011
  • Percentage completion 95%

Detailed Description

  • Create a dist-f15-ghc7 buildroot to avoid dependency disruption to rawhide. [done]
  • Create scripts to automate the rebuilding of all the Haskell packages in Fedora. [done]
  • Update ghc to new version and build into dist-f15-ghc7. [done]
  • Update ghc-rpm-macros if necessary. [done]
  • Add support to cabal2spec for delta-patching packages to update them for newer packaging template and rebuild.
  • Rebuild packages including all the libraries in dist-f15-ghc7 with the automated cabal2spec patching and dependency build script. [done]
  • Move final built sets of packages to dist-f15. [done]
  • Test packages in rawhide [done]

Benefit to Fedora

Fedora will benefit by providing the latest ghc compiler to its users with many performance and feature enhancements.


  • Minimal impact outside of Haskell packages
  • Rebuilding all Haskell packages: see Detailed Description above

How to Test

  • Packagers
    • Build packages against GHC 7.0
    • Many Haskell libraries and applications include test suites already (not many are enabled to my knowledge). Enabling these will help catch errors.
  • Testers
    • General usage of packaged Haskell applications to find bugs (probably manifest as assertion errors or exceptions)
      • darcs
      • cabal

User Experience

Developers will be able to use GHC 7.0.


  • Haskell packages rebuilds [done]
  • haskell-platform-2011.1.0.0 release: schedule

Contigency Plan

  • In the unlikely event that the version upgrade is not possible, any partial work will simply be left dist-f15-ghc and we will release F15 with the current ghc-6.12.3 set of packages.


Release Notes

Comments and Discussion