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== Current status == | == Current status == | ||
* Targeted release: [[Releases/22 | Fedora 22 ]] | * Targeted release: [[Releases/22 | Fedora 22 ]] | ||
* Last updated: 2015- | * Last updated: 2015-04-03 | ||
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== Detailed Description == | == Detailed Description == | ||
* | * This involves updating ghc from 7.6.3 to 7.8.4, and updating/rebuilding all Fedora Haskell packages. [packages built] | ||
* The initial work will be done locally offline to make sure that it is possible to build all our packages with ghc-7.8 and the latest updated libraries. [done] | * The initial work will be done locally offline to make sure that it is possible to build all our packages with ghc-7.8 and the latest updated libraries. [done] | ||
* A Koji side tag will then be used to build all the packages before the Side Tag Builds Deadline. [ | * A Koji side tag will then be used to build all the packages before the Side Tag Builds Deadline. [done] | ||
* Once the packages have been tested, the builds will be moved into f22 | * Once the packages have been tested, the builds will be moved into f22. [done] | ||
== Benefit to Fedora == | == Benefit to Fedora == | ||
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* Release engineering: | * Release engineering: f22-ghc koji side tag [[https://fedorahosted.org/rel-eng/ticket/6085 ticket]] | ||
<!-- REQUIRED FOR SYSTEM WIDE CHANGES --> | <!-- REQUIRED FOR SYSTEM WIDE CHANGES --> | ||
<!-- Does this feature require coordination with release engineering (e.g. changes to installer image generation or update package delivery)? Is a mass rebuid required? If a rel-eng ticket exists, add a link here. --> | <!-- Does this feature require coordination with release engineering (e.g. changes to installer image generation or update package delivery)? Is a mass rebuid required? If a rel-eng ticket exists, add a link here. --> | ||
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<!-- If this change proposal is noticeable by its target audience, how will their experiences change as a result? Describe what they will see or notice. --> | <!-- If this change proposal is noticeable by its target audience, how will their experiences change as a result? Describe what they will see or notice. --> | ||
<!-- REQUIRED FOR SYSTEM WIDE CHANGES --> | <!-- REQUIRED FOR SYSTEM WIDE CHANGES --> | ||
Fedora users using GHC to programming or develop in Haskell will benefit from the new features and performance enhancements of the latest version of the ghc compiler. | |||
Additionally various package upgrades will also improve the experience for users of Haskell packages. | Additionally various package upgrades will also improve the experience for users of Haskell packages. | ||
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== Documentation == | == Documentation == | ||
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* Release notes for [https://downloads.haskell.org/~ghc/7.8.4/docs/html/users_guide/release-7-8-1.html 7.8.1] | |||
* Bug fix releases: [https://downloads.haskell.org/~ghc/7.8.4/docs/html/users_guide/release-7-8-3.html 7.8.3] and [https://downloads.haskell.org/~ghc/7.8.4/docs/html/users_guide/release-7-8-4.html 7.8.4] | |||
== Release Notes == | == Release Notes == | ||
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[[Category: | [[Category:ChangeAcceptedF22]] | ||
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Latest revision as of 09:27, 3 April 2015
GHC 7.8
Summary
Update the GHC Haskell compiler to the major new 7.8 release, and update/rebuild all Haskell packages against it.
Owner
- Name: Jens Petersen, Ricky Elrod, Haskell_SIG
- Email: petersen@redhat.com, relrod@redhat.com, haskell@lists.fedoraproject.org
- Release notes owner:
Current status
Detailed Description
- This involves updating ghc from 7.6.3 to 7.8.4, and updating/rebuilding all Fedora Haskell packages. [packages built]
- The initial work will be done locally offline to make sure that it is possible to build all our packages with ghc-7.8 and the latest updated libraries. [done]
- A Koji side tag will then be used to build all the packages before the Side Tag Builds Deadline. [done]
- Once the packages have been tested, the builds will be moved into f22. [done]
Benefit to Fedora
GHC 7.8 is major new version of the major Haskell compiler with many new features and enhancements. See the upstream release notes link below for more details on the changes.
For example the new runtime I/O manager scales significantly better for larger workloads compared to the previous one: it should scale linearly up to approximately 32 cores (reference).
Scope
- Proposal owners:
- locally test rebuilding and updating of all packages
- (optional) update macros to subpackage static libraries
- push changes to Koji
- testing
- Other developers:
- If you own a package which contains some Haskell code built with ghc you will need to rebuild you package to make sure it still rebuilds with ghc-7.8. Feel free to contact the Haskell SIG if we need assistance with fixing any build breakage, and we will try to help out.
- Release engineering: f22-ghc koji side tag [ticket]
- Policies and guidelines:
- There may be some lesser changes to the Haskell Packaging Guidelines needed - they could be done after this Change.
Upgrade/compatibility impact
- Upgrading will be tested and should Just Work.
- Local user code may need some minor changes to build with ghc-7.8.
How To Test
- yum install ghc cabal-install cabal-rpm pandoc xmonad git-annex hledger
- Check these packages install, run correctly, and can build Haskell and Hackage packages.
User Experience
Fedora users using GHC to programming or develop in Haskell will benefit from the new features and performance enhancements of the latest version of the ghc compiler. Additionally various package upgrades will also improve the experience for users of Haskell packages.
Dependencies
- GHC 7.8.3 was released 2014-07-11
- GHC 7.8.4 bugfix released 2014-12-23
There are a few packages outside the Haskell SIG that use ghc for some part of their build. Assistance can be provided if needed to build them with latest ghc.
Contingency Plan
- Contingency mechanism: if it is not possible to complete the building and testing in f22-build in time for the Mass Rebuild then ghc will be reverted back to current 7.6.3 and packages rebuilt as necessary. (Proposal Owners)
- Contingency deadline: Beta Freeze
- Blocks release: Yes
- Blocks product: N/A