Re: F36 Change: GHC compiler parallel version installs (Self-Contained Change proposal)
On 12/13/21 08:56, Ben Cotton wrote:
https://fedoraproject.org/wiki/Changes/GHC_parallel_version_installs
== Summary ==
Introduce ghcX.Y packages to Fedora which can be parallel installed,
in addition to the main ghc package.
== Owner ==
* Name: [[User:Petersen|Jens Petersen]]
* Email: petersen(a)redhat.com
== Detailed Description ==
Currently ghc modules are available in Fedora but they cannot be
installed in parallel.
What is the plan for the ghc modules?
-Tom
This Change will enable being able to easily install multiple
versions
of ghc in parallel,
which can be useful for development - both for working on different projects
and testing projects for compatibility across different ghc versions.
== Feedback ==
This was proposed to the Fedora Haskell mailing list already and so
far there were no objections.
== Benefit to Fedora ==
Parallel installs of ghc versions will allow more flexible Haskell
development using Fedora Linux.
== Scope ==
* Proposal owners:
** update ghc-rpm-macros to support the packaging [done]
** add ghc9.2 [built for rawhide]
** add ghc9.0 [repo created]
** add ghc8.10 [may not be needed for F36]
** add ghc8.8 [stretch goal]
** add cabal-install3.4 and/or cabal-install3.6 [stretch goal]
** also backport ghcX.Y's to F35, F34, and EPEL
* Other developers: N/A
* Release engineering: N/A
* Policies and guidelines: N/A (not needed for this Change)
* Trademark approval: N/A (not needed for this Change)
* Alignment with Objectives: N/A
== Upgrade/compatibility impact ==
These are new packages so upgrading from older releases should be fine.
Eventually future Fedora version upgrades will probably need to
obsolete very old ghcX.Y versions.
== How To Test ==
1. dnf install ghc ghc9.2 ghc9.0
== User Experience ==
Installing ghc, ghc9.0, and ghc9.2 will give you /usr/bin/ghc,
/usr/bin/ghc-9.0.x and /usr/bin/ghc-9.2.x.
Their Haskell libraries will have ghc versioned directories and .so files.
== Dependencies ==
N/A
== Contingency Plan ==
* Contingency mechanism: (What to do? Who will do it?) N/A (not a
System Wide Change)
* Contingency deadline: N/A (not a System Wide Change)
* Blocks release? N/A (not a System Wide Change)
== Documentation ==
N/A (not a System Wide Change)
== Release Notes ==
With the introduction of versioned ghcX.Y packages multiple versions
of the Haskell GHC compiler can now be installed parallel in the
Fedora Linux.