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== Summary ==
== Summary ==
A new ''perl 5.36'' version brings a lot of changes done over a year of development. Perl 5.36 will be released in May 20th 2022. See [https://metacpan.org/pod/release/SHAY/perl-5.35.11/pod/perldelta.pod 5.36.0 perldelta] for more details about new release.
A new ''perl 5.36'' version brings a lot of changes done over a year of development. Perl 5.36 will be released in May 28th 2022. See [https://metacpan.org/release/RJBS/perl-5.36.0/view/pod/perldelta.pod perldelta] for more details about new release.
https://metacpan.org/release/SHAY/perl-5.35.11/view/pod/perldelta.pod


== Owner ==
== Owner ==
* Name: [[User:Jplesnik| Jitka Plesníková]]
* Name: [[User:Jplesnik| Jitka Plesníková]], [[User:Mspacek| Michal Josef Špaček]]
* Email: <jplesnik@redhat.com>
* Email: <jplesnik@redhat.com>, <mspacek@redhat.com>
* Name: [[User:Mspacek| Michal Josef Špaček]]
* Email: <mspacek@redhat.com>
<!--- UNCOMMENT only for Changes with assigned Shepherd (by FESCo)
<!--- UNCOMMENT only for Changes with assigned Shepherd (by FESCo)
* FESCo shepherd: [[User:FASAccountName| Shehperd name]] <email address>
* FESCo shepherd: [[User:FASAccountName| Shehperd name]] <email address>
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== Current status ==
== Current status ==
[[Category:ChangePageIncomplete]]
[[Category:ChangeAcceptedF37]]
<!-- When your change proposal page is completed and ready for review and announcement -->
<!-- When your change proposal page is completed and ready for review and announcement -->
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[[Category:SystemWideChange]]
[[Category:SystemWideChange]]


* Targeted release: [[Releases/37 | Fedora Linux 37 ]]  
* Targeted release: [[Releases/37/ChangeSet| Fedora Linux 37 ]]  
* Last updated: <!-- this is an automatic macro — you don't need to change this line -->  {{REVISIONYEAR}}-{{REVISIONMONTH}}-{{REVISIONDAY2}}  
* Last updated: <!-- this is an automatic macro — you don't need to change this line -->  {{REVISIONYEAR}}-{{REVISIONMONTH}}-{{REVISIONDAY2}}  
<!-- After the change proposal is accepted by FESCo, tracking bug is created in Bugzilla and linked to this page  
<!-- After the change proposal is accepted by FESCo, tracking bug is created in Bugzilla and linked to this page  
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ON_QA -> change is fully code complete
ON_QA -> change is fully code complete
-->
-->
* FESCo issue: <will be assigned by the Wrangler>
* [https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/ZYPUXNRJNZ3UNQCN6IHBLRKT2TY3HWTT/ devel list]
* Tracker bug: <will be assigned by the Wrangler>
* FESCo issue: [https://pagure.io/fesco/issue/2791 #2791]
* Release notes tracker: <will be assigned by the Wrangler>
* Tracker bug: [https://bugzilla.redhat.com/show_bug.cgi?id=2088002 #2088002]
* Release notes tracker: [https://pagure.io/fedora-docs/release-notes/issue/840 #840]


=== Completed Items ===
=== Completed Items ===
 
* Get dedicated [https://pagure.io/releng/issue/10771#comment-795497 build-root from rel-engs (''f37-perl'')]
=== Items in Progress ===
* Upstream to release Perl 5.36
 
=== Items to Be Done ===
 
* Get dedicated <!--[https://pagure.io/releng/issue/10119 --> build-root from rel-engs (''f37-perl'') <!-- ] -->
* Upstream to release Perl 5.34
<!--* Remove old perl(:MODULE_COMPAT_5.34.*) from perl -->
* Define perl_bootstrap in perl-srpm-macros
* Define perl_bootstrap in perl-srpm-macros
* Rebase perl to 5.36.0
* Rebase perl to 5.36.0
<!--* Build new perl 5.36 keeping old COMPAT Provides -->
* Rebuild dual-lived packages (otherwise dnf recommends --skip-broken and fails)
* Rebuild dual-lived packages (otherwise dnf recommends --skip-broken and fails)
* Rebuild packages needed for minimal build-root
* Rebuild packages needed for minimal build-root
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* Rebuild other packages: Use Fedora::Rebuild dependency solver
* Rebuild other packages: Use Fedora::Rebuild dependency solver
* Undefine perl_bootstrap
* Undefine perl_bootstrap
* Rebuild packages having perl_bootstrap condition in spec file (127 packages)
* Rebuild packages having perl_bootstrap condition in spec file (129 packages)
* Rebuild all updated packages
* Rebuild all updated packages
* [https://jplesnik.fedorapeople.org/5.36/ Final lists of results]
* [https://jplesnik.fedorapeople.org/5.36/ Final lists of results]
* Merge dedicated build-root to rawhide and remove the dedicated one by rel-engs
* Merge dedicated build-root to rawhide and remove the dedicated one by rel-engs
* Synchronize packages upgraded in ''f37'' build root
* Synchronize packages upgraded in ''f37'' build root
* Rebuild Perl packages: 0 of 3249 done (0.00%)
 
=== Items in Progress ===
* Rebuild Perl packages: 3265 of 3266 done (99.97 %)
* Failed packages (1):
** gplugin - [https://bugzilla.redhat.com/show_bug.cgi?id=2093218 BZ#2093218] - only ppc64le
* Rebuild Fedora modules: 2 of 7 (28.57 %)
** nginx:mainline - DONE
** nginx:1.20
** postgresql:10
** postgresql:11
** postgresql:12
** postgresql:14
** subversion:1.14 - DONE
 
=== Items to Be Done ===


== Detailed Description ==
== Detailed Description ==
New perl is released every year and updates containing mainly bug fixes follow during the year. The 5.36.0 version is stable release this year.
New perl is released every year and updates containing mainly bug fixes follow during the year. The 5.36.0 version is stable release this year.
== Feedback ==
<!-- Summarize the feedback from the community and address why you chose not to accept proposed alternatives. This section is optional for all change proposals but is strongly suggested. Incorporating feedback here as it is raised gives FESCo a clearer view of your proposal and leaves a good record for the future. If you get no feedback, that is useful to note in this section as well. For innovative or possibly controversial ideas, consider collecting feedback before you file the change proposal. -->


== Benefit to Fedora ==
== Benefit to Fedora ==
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Owners of packages that fail to rebuild, mainly perl-sig users, will be asked using Bugzilla to fix or remove their packages from the distribution.
Owners of packages that fail to rebuild, mainly perl-sig users, will be asked using Bugzilla to fix or remove their packages from the distribution.


* Release engineering: [https://pagure.io/releng/issues #Releng issue number] <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
* Release engineering: [https://pagure.io/releng/issue/10771 #10771] <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
Release engineers will be asked for new ''f37-perl'' build-root inheriting from ''f37'' build-root. After successful finishing the rebuild, they will be asked to merge ''f37-perl'' packages back to ''f37'' build-root.
Release engineers will be asked for new ''f37-perl'' build-root inheriting from ''f37'' build-root. After successful finishing the rebuild, they will be asked to merge ''f37-perl'' packages back to ''f37'' build-root.


* Policies and guidelines: N/A (not needed for this Change) <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
* Policies and guidelines: N/A (not needed for this Change)  


* Trademark approval: N/A (not needed for this Change)
* Trademark approval: N/A (not needed for this Change)
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== User Experience ==
== User Experience ==
<!-- If this change proposal is noticeable by users, how will their experiences change as a result?
There should not be any remarkable change in user experience. With the exception that previously locally installed modules with a CPAN clients will need a reinstallation.
 
This section partially overlaps with the Benefit to Fedora section above. This section should be primarily about the User Experience, written in a way that does not assume deep technical knowledge. More detailed technical description should be left for the Benefit to Fedora section.
 
Describe what Users will see or notice, for example:
  - Packages are compressed more efficiently, making downloads and upgrades faster by 10%.
  - Kerberos tickets can be renewed automatically. Users will now have to authenticate less and become more productive. Credential management improvements mean a user can start their work day with a single sign on and not have to pause for reauthentication during their entire day.
- Libreoffice is one of the most commonly installed applications on Fedora and it is now available by default to help users "hit the ground running".
- Green has been scientifically proven to be the most relaxing color. The move to a default background color of green with green text will result in Fedora users being the most relaxed users of any operating system.
-->


== Dependencies ==
== Dependencies ==
<!-- What other packages (RPMs) depend on this package?  Are there changes outside the developers' control on which completion of this change depends?  In other words, completion of another change owned by someone else and might cause you to not be able to finish on time or that you would need to coordinate?  Other upstream projects like the kernel (if this is not a kernel change)? -->
There is more than 3200 packages depending on perl. Most of them are expected not to break. Finishing this change can be endangered only by critical changes in a toolchain.
 
<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->


== Contingency Plan ==
== Contingency Plan ==


<!-- If you cannot complete your feature by the final development freeze, what is the backup plan?  This might be as simple as "Revert the shipped configuration".  Or it might not (e.g. rebuilding a number of dependent packages).  If you feature is not completed in time we want to assure others that other parts of Fedora will not be in jeopardy.  -->
<!-- If you cannot complete your feature by the final development freeze, what is the backup plan?  This might be as simple as "Revert the shipped configuration".  Or it might not (e.g. rebuilding a number of dependent packages).  If you feature is not completed in time we want to assure others that other parts of Fedora will not be in jeopardy.  -->
* Contingency mechanism: (What to do?  Who will do it?) N/A (not a System Wide Change)  <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
* Contingency mechanism: If we find perl 5.36 is not suitable for Fedora 37, we will revert back to perl 5.34 and we drop the temporary build-root with already rebuilt packages.
<!-- When is the last time the contingency mechanism can be put in place?  This will typically be the beta freeze. -->
<!-- When is the last time the contingency mechanism can be put in place?  This will typically be the beta freeze. -->
* Contingency deadline: N/A (not a System Wide Change)  <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
* Contingency deadline: branching Fedora 37 from Rawhide.
<!-- Does finishing this feature block the release, or can we ship with the feature in incomplete state? -->
<!-- Does finishing this feature block the release, or can we ship with the feature in incomplete state? -->
* Blocks release? N/A (not a System Wide Change), Yes/No <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
* Blocks release? No.
 


== Documentation ==
== Documentation ==
<!-- Is there upstream documentation on this change, or notes you have written yourself?  Link to that material here so other interested developers can get involved. -->
* [https://metacpan.org/release/RJBS/perl-5.36.0/view/pod/perldelta.pod 5.36.0 perldelta]
 
* [https://lists.fedoraproject.org/archives/list/perl-devel@lists.fedoraproject.org/thread/4JFWDKMYKEMLTUQSIUIHZZNGM5UP76EM/ An announcement on perl-devel mailing list]
<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
* [https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/ZYPUXNRJNZ3UNQCN6IHBLRKT2TY3HWTT/ An announcement on fedora-devel mailing list]
N/A (not a System Wide Change)


== Release Notes ==
== Release Notes ==
<!-- The Fedora Release Notes inform end-users about what is new in the release.  Examples of past release notes are here: http://docs.fedoraproject.org/release-notes/ -->
* Core Enhancements
<!-- The release notes also help users know how to deal with platform changes such as ABIs/APIs, configuration or data file formats, or upgrade concerns. If there are any such changes involved in this change, indicate them here. A link to upstream documentation will often satisfy this need.  This information forms the basis of the release notes edited by the documentation team and shipped with the release.
** a new commmand-line flag ''-g'' which it is alias for -0777
 
** Unicode 14.0 is supported
Release Notes are not required for initial draft of the Change Proposal but has to be completed by the Change Freeze.  
** regex sets are no longer considered experimental
-->
** Variable length lookbehind is mostly no longer considered experimental
** ''SIGFPE'' no longer deferred
** iterating over multiple values at a time (experimental)
** new module ''builtin'' which provides documentation for new always-present functions that are built into the interpreter (experimental)
** adds support for ''defer'' blocks, which are blocks of code prefixed by the ''defer'' modifier (experimental)
** ''try''/''catch'' syntax has been extended to support an optional third block introduced by the ''finally'' keyword (experimental)
** non-ASCII delimiters for quote-like operators (experimental)
** @_ is now experimental within signatured subs
* Incompatible Changes
** A physically empty ''sort'' is now a compile-time error
* Deprecations
** ''use VERSION'' (where VERSION is below v5.11) after ''use v5.11'' is deprecated
* Lots of modules were updated
* Changes in errors and warnings can cause failures in tests
* Performance Enhancements
** Perl now probe for compiler support for C11 thread local storage, and where available use this for "implicit context" for XS extensions making API calls for a threaded Perl build. This requires fewer function calls at the C level than POSIX thread specific storage.

Latest revision as of 12:17, 13 December 2022

Perl 5.36

Summary

A new perl 5.36 version brings a lot of changes done over a year of development. Perl 5.36 will be released in May 28th 2022. See perldelta for more details about new release.

Owner

Current status

Completed Items

  • Get dedicated build-root from rel-engs (f37-perl)
  • Upstream to release Perl 5.36
  • Define perl_bootstrap in perl-srpm-macros
  • Rebase perl to 5.36.0
  • Rebuild dual-lived packages (otherwise dnf recommends --skip-broken and fails)
  • Rebuild packages needed for minimal build-root
  • Rebuild packages needed for building source packages from git repository
  • Rebuild other packages: Use Fedora::Rebuild dependency solver
  • Undefine perl_bootstrap
  • Rebuild packages having perl_bootstrap condition in spec file (129 packages)
  • Rebuild all updated packages
  • Final lists of results
  • Merge dedicated build-root to rawhide and remove the dedicated one by rel-engs
  • Synchronize packages upgraded in f37 build root

Items in Progress

  • Rebuild Perl packages: 3265 of 3266 done (99.97 %)
  • Failed packages (1):
  • Rebuild Fedora modules: 2 of 7 (28.57 %)
    • nginx:mainline - DONE
    • nginx:1.20
    • postgresql:10
    • postgresql:11
    • postgresql:12
    • postgresql:14
    • subversion:1.14 - DONE

Items to Be Done

Detailed Description

New perl is released every year and updates containing mainly bug fixes follow during the year. The 5.36.0 version is stable release this year.

Benefit to Fedora

Up-to-date and latest perl release will be delivered to Fedora users.

Scope

Every Perl package will be rebuilt in a dedicated f37-perl build-root against perl 5.36.0 and then if no major problem emerges the packages will be merged back to f37 build-root.

  • Proposal owners:

New perl and all packages requiring perl or a Perl module will be rebuilt into f37-perl build-root.

  • Other developers: N/A (not a System Wide Change)

Owners of packages that fail to rebuild, mainly perl-sig users, will be asked using Bugzilla to fix or remove their packages from the distribution.

Release engineers will be asked for new f37-perl build-root inheriting from f37 build-root. After successful finishing the rebuild, they will be asked to merge f37-perl packages back to f37 build-root.

  • Policies and guidelines: N/A (not needed for this Change)
  • Trademark approval: N/A (not needed for this Change)
  • Alignment with Objectives:

Upgrade/compatibility impact

Vast majority of functionality will be preserved. Only the packages that failed to build against perl 5.36 will be removed from the distribution. That will require to remove those packages from the existing systems otherwise a package manager will encounter unsatisfied dependencies. The developers in Perl language are advised to install perl-doc and perl-debugger packages.

How To Test

Try upgrading from Fedora 36 to 37. Try some Perl application to verify they work as expected. Try embedded perl in slapd or snmpd.

User Experience

There should not be any remarkable change in user experience. With the exception that previously locally installed modules with a CPAN clients will need a reinstallation.

Dependencies

There is more than 3200 packages depending on perl. Most of them are expected not to break. Finishing this change can be endangered only by critical changes in a toolchain.

Contingency Plan

  • Contingency mechanism: If we find perl 5.36 is not suitable for Fedora 37, we will revert back to perl 5.34 and we drop the temporary build-root with already rebuilt packages.
  • Contingency deadline: branching Fedora 37 from Rawhide.
  • Blocks release? No.

Documentation

Release Notes

  • Core Enhancements
    • a new commmand-line flag -g which it is alias for -0777
    • Unicode 14.0 is supported
    • regex sets are no longer considered experimental
    • Variable length lookbehind is mostly no longer considered experimental
    • SIGFPE no longer deferred
    • iterating over multiple values at a time (experimental)
    • new module builtin which provides documentation for new always-present functions that are built into the interpreter (experimental)
    • adds support for defer blocks, which are blocks of code prefixed by the defer modifier (experimental)
    • try/catch syntax has been extended to support an optional third block introduced by the finally keyword (experimental)
    • non-ASCII delimiters for quote-like operators (experimental)
    • @_ is now experimental within signatured subs
  • Incompatible Changes
    • A physically empty sort is now a compile-time error
  • Deprecations
    • use VERSION (where VERSION is below v5.11) after use v5.11 is deprecated
  • Lots of modules were updated
  • Changes in errors and warnings can cause failures in tests
  • Performance Enhancements
    • Perl now probe for compiler support for C11 thread local storage, and where available use this for "implicit context" for XS extensions making API calls for a threaded Perl build. This requires fewer function calls at the C level than POSIX thread specific storage.
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