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(First version of the glibc 2.31 change proposal for Fedora 32)
 
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* changing system defaults
 
* changing system defaults
  
For Self Contained Changes, sections marked as "REQUIRED FOR SYSTEM WIDE CHANGES" are OPTIONAL but FESCo/Wrangler can request more details (especially in case the change proposal category is  
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For Self Contained Changes, sections marked as "REQUIRED FOR SYSTEM WIDE CHANGES" are OPTIONAL but FESCo/Wrangler can request more details (especially in case the change proposal category is improper or updated to System Wide category). For System Wide Changes all fields on this form are required for FESCo acceptance (when applies).   
improper or updated to System Wide category). For System Wide Changes all fields on this form are required for FESCo acceptance (when applies).   
 
  
 
We request that you maintain the same order of sections so that all of the change proposal pages are uniform.
 
We request that you maintain the same order of sections so that all of the change proposal pages are uniform.
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== Summary ==
 
== Summary ==
<!-- A sentence or two summarizing what this change is and what it will do. This information is used for the overall changeset summary page for each release. -->
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<!-- A sentence or two summarizing what this change is and what it will do. This information is used for the overall changeset summary page for each release.
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Note that motivation for the change should be in the Motivation section below, and this part should answer the question "What?" rather than "Why?". -->
 
Switch glibc in Fedora 32 to glibc version 2.31.
 
Switch glibc in Fedora 32 to glibc version 2.31.
  
 
== Owner ==
 
== Owner ==
 
<!--  
 
<!--  
For change proposals to quality as self-contained, owners of all affected packages need to be included here. Alternatively, a SIG can be listed as an owner if it owns all affected packages.  
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For change proposals to qualify as self-contained, owners of all affected packages need to be included here. Alternatively, a SIG can be listed as an owner if it owns all affected packages.  
 
This should link to your home wiki page so we know who you are.  
 
This should link to your home wiki page so we know who you are.  
 
-->
 
-->
 
* Name: [[User:submachine|Arjun Shankar]]
 
* Name: [[User:submachine|Arjun Shankar]]
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<!-- Include you email address that you can be reached should people want to contact you about helping with your change, status is requested, or technical issues need to be resolved. If the change proposal is owned by a SIG, please also add a primary contact person. -->
 
* Email: arjun@redhat.com
 
* Email: arjun@redhat.com
* Release notes owner:  
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<!--- UNCOMMENT only for Changes with assigned Shepherd (by FESCo)
* Release notes ticket:
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* FESCo shepherd: [[User:FASAccountName| Shehperd name]] <email address>
<!-- Include you email address that you can be reached should people want to contact you about helping with your change, status is requested, or technical issues need to be resolved. If the change proposal is owned by a SIG, please also add a primary contact person. -->
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-->
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<!--- UNCOMMENT only if this Change aims specific product, working group (Cloud, Workstation, Server, Base, Env & Stacks)
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* Product:
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* Responsible WG:
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== Current status ==
 
== Current status ==
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<!-- 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  
 
Bugzilla states meaning as usual:
 
Bugzilla states meaning as usual:
NEW -> change proposal is submitted and announced
 
 
ASSIGNED -> accepted by FESCo with on going development
 
ASSIGNED -> accepted by FESCo with on going development
 
MODIFIED -> change is substantially done and testable
 
MODIFIED -> change is substantially done and testable
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CLOSED as NEXTRELEASE -> change is completed and verified and will be delivered in next release under development
 
CLOSED as NEXTRELEASE -> change is completed and verified and will be delivered in next release under development
 
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* Tracker bug:
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* Tracker bug: [https://bugzilla.redhat.com/show_bug.cgi?id=1782545 #1782545]
* Release Notes Tracker:
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* Release notes tracker: [https://pagure.io/fedora-docs/release-notes/issue/422 #422]
  
 
== Detailed Description ==
 
== Detailed Description ==
 +
 
<!-- Expand on the summary, if appropriate.  A couple sentences suffices to explain the goal, but the more details you can provide the better. -->
 
<!-- Expand on the summary, if appropriate.  A couple sentences suffices to explain the goal, but the more details you can provide the better. -->
 
The GNU C Library version 2.31 will be released at the beginning of February 2020; we have started closely tracking the glibc 2.31 development code in Fedora Rawhide and are addressing any issues as they arise. Given the present schedule Fedora 32 will branch after the GLIBC 2.31 upstream release. However, the mass rebuild schedule means Fedora 32 will mass rebuild (if required) after GLIBC 2.31 upstream freezes ABI for release, but before the actual release, so careful attention must be paid to any last minute ABI changes.
 
The GNU C Library version 2.31 will be released at the beginning of February 2020; we have started closely tracking the glibc 2.31 development code in Fedora Rawhide and are addressing any issues as they arise. Given the present schedule Fedora 32 will branch after the GLIBC 2.31 upstream release. However, the mass rebuild schedule means Fedora 32 will mass rebuild (if required) after GLIBC 2.31 upstream freezes ABI for release, but before the actual release, so careful attention must be paid to any last minute ABI changes.
  
 
== Benefit to Fedora ==
 
== Benefit to Fedora ==
<!-- What is the benefit to the platform?  If this is a major capability update, what has changed? If this is a new functionality, what capabilities does it bring? Why will Fedora become a better distribution or project because of this proposal?-->
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<!-- What is the benefit to the distributionWill the software we generate be improved? How will the process of creating Fedora releases be improved?
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      Be sure to include the following areas if relevant:
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      If this is a major capability update, what has changed?
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          For example: This change introduces Python 5 that runs without the Global Interpreter Lock and is fully multithreaded.
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      Is this an improvement to maintainer processes?
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          For example: Gating Fedora packages on automatic QA tests will make rawhide more stable and allow changes to be implemented more smoothly.
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      Is this an improvement targeted as specific contributors?
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          For example: Ensuring that a minimal set of tools required for contribution to Fedora are installed by default eases the onboarding of new contributors.
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    When a Change has multiple benefits, it's better to list them all.
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 +
    Consider these Change pages from previous editions as inspiration:
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    https://fedoraproject.org/wiki/Changes/Annobin (low-level and technical, invisible to users)
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    https://fedoraproject.org/wiki/Changes/ParallelInstallableDebuginfo (low-level, but visible to advanced users)
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    https://fedoraproject.org/wiki/Changes/VirtualBox_Guest_Integration (primarily a UX change)
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    https://fedoraproject.org/wiki/Changes/NoMoreAlpha (an improvement to distro processes)
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    https://fedoraproject.org/wiki/Changes/perl5.26 (major upgrade to a popular software stack, visible to users of that stack)
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Stays up to date with latest security and bug fixes from glibc upstream.
 
Stays up to date with latest security and bug fixes from glibc upstream.
  
 
== Scope ==
 
== Scope ==
<!-- What work do the developers have to accomplish to complete the change in time for release?  Is it a large change affecting many parts of the distribution or is it a very isolated change? What are those changes?-->
 
 
* Proposal owners: Update glibc to 2.31.
 
* Proposal owners: Update glibc to 2.31.
 
<!-- What work do the feature owners have to accomplish to complete the feature in time for release?  Is it a large change affecting many parts of the distribution or is it a very isolated change? What are those changes?-->
 
<!-- What work do the feature owners have to accomplish to complete the feature in time for release?  Is it a large change affecting many parts of the distribution or is it a very isolated change? What are those changes?-->
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<!-- What work do other developers have to accomplish to complete the feature in time for release?  Is it a large change affecting many parts of the distribution or is it a very isolated change? What are those changes?-->
 
<!-- What work do other developers have to accomplish to complete the feature in time for release?  Is it a large change affecting many parts of the distribution or is it a very isolated change? What are those changes?-->
  
* Release engineering:  [https://pagure.io/releng/issue/ #]  <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
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* Release engineering:  [https://pagure.io/releng/issue/9040 #9040]  <!-- 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.  -->
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<!-- Does this feature require coordination with release engineering (e.g. changes to installer image generation or update package delivery)?  Is a mass rebuild required?  include a link to the releng issue.
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The issue is required to be filed prior to feature submission, to ensure that someone is on board to do any process development work and testing, and that all changes make it into the pipeline; a bullet point in a change is not sufficient communication -->
  
 
* Policies and guidelines: The policies and guidelines do not need to be updated. <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
* Policies and guidelines: The policies and guidelines do not need to be updated. <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
<!-- Do the packaging guidelines or other documents need to be updated for this feature?  If so, does it need to happen before or after the implementation is done?  If a FPC ticket exists, add a link here. -->
 
<!-- Do the packaging guidelines or other documents need to be updated for this feature?  If so, does it need to happen before or after the implementation is done?  If a FPC ticket exists, add a link here. -->
  
* Trademark approval: Not needed for this change
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* Trademark approval: N/A (not needed for this Change)
 +
<!-- If your Change may require trademark approval (for example, if it is a new Spin), file a ticket ( https://fedorahosted.org/council/ ) requesting trademark approval from the Fedora Council. This approval will be done via the Council's consensus-based process. -->
  
 
== Upgrade/compatibility impact ==
 
== Upgrade/compatibility impact ==
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== User Experience ==
 
== User Experience ==
<!-- 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. -->
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<!-- If this change proposal is noticeable by users, how will their experiences change as a result?
<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
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 +
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.
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  Describe what Users will see or notice, for example:
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  - Packages are compressed more efficiently, making downloads and upgrades faster by 10%.
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  - 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.
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- 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".
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- 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.
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Users will see improved performance, many bugfixes and improvements to POSIX compliance, additional locales, etc. The glibc 2.31 NEWS update will include more details.
 
Users will see improved performance, many bugfixes and improvements to POSIX compliance, additional locales, etc. The glibc 2.31 NEWS update will include more details.
  
 
== 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)? -->
 
<!-- 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)? -->
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<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
All packages do not need to be rebuilt.
 
All packages do not need to be rebuilt.
  
 
== Contingency Plan ==
 
== Contingency Plan ==
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<!-- 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: Given that Rawhide has started tracking glibc 2.31, no show-stopper problems are expected.  At this point, we can still revert to upstream version 2.30 if insurmountable problems appear, but to do so may require a mass rebuild to remove new symbols from the ABI/API.
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* Contingency mechanism: Given that Rawhide has started tracking glibc 2.31, no show-stopper problems are expected.  At this point, we can still revert to upstream version 2.30 if insurmountable problems appear, but to do so may require a mass rebuild to remove new symbols from the ABI/API. <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
 
 
<!-- 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: Upstream ABI freeze deadline of 2020-01-01. <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
* Contingency deadline: Upstream ABI freeze deadline of 2020-01-01. <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
 
<!-- 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? Upgrading glibc does block the release. We should not ship without a newer glibc, there will be gcc and language features that depend on glibc being upgraded. Thus without the upgrade some features will be disabled or fall back to less optimal implementations. <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
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* Blocks release? Yes, upgrading glibc does block the release. We should not ship without a newer glibc, there will be gcc and language features that depend on glibc being upgraded. Thus without the upgrade some features will be disabled or fall back to less optimal implementations. <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
  
 
== 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. -->
 
<!-- 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. -->
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<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
The glibc manual contains the documentation for the release and doesn't need any more additional work.
 
The glibc manual contains the documentation for the release and doesn't need any more additional work.
<!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
 
  
 
== Release Notes ==
 
== Release Notes ==
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Release Notes are not required for initial draft of the Change Proposal but has to be completed by the Change Freeze.  
 
Release Notes are not required for initial draft of the Change Proposal but has to be completed by the Change Freeze.  
 
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* Release Notes tracking: <will be assigned by the Wrangler>
 
  
 
The GNU C Library version 2.31 will be released at the beginning of February 2020. The current NEWS notes can be seen here as they are added: https://sourceware.org/git/?p=glibc.git;a=blob;f=NEWS;hb=HEAD
 
The GNU C Library version 2.31 will be released at the beginning of February 2020. The current NEWS notes can be seen here as they are added: https://sourceware.org/git/?p=glibc.git;a=blob;f=NEWS;hb=HEAD
  
[[Category:ChangePageIncomplete]]
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[[Category:ChangeAcceptedF32]]
 
<!-- 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 -->
 
<!-- remove Category:ChangePageIncomplete and change it to Category:ChangeReadyForWrangler -->
 
<!-- remove Category:ChangePageIncomplete and change it to Category:ChangeReadyForWrangler -->
<!-- The Wrangler announces the Change to the devel-announce list and changes the category to Category:ChangePageIncomplete (no action required) -->  
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<!-- The Wrangler announces the Change to the devel-announce list and changes the category to Category:ChangeAnnounced (no action required) -->  
 
<!-- After review, the Wrangler will move your page to Category:ChangeReadyForFesco... if it still needs more work it will move back to Category:ChangePageIncomplete-->
 
<!-- After review, the Wrangler will move your page to Category:ChangeReadyForFesco... if it still needs more work it will move back to Category:ChangePageIncomplete-->
  
 
<!-- Select proper category, default is Self Contained Change -->
 
<!-- Select proper category, default is Self Contained Change -->
 
<!-- [[Category:SelfContainedChange]] -->
 
<!-- [[Category:SelfContainedChange]] -->
<!-- [[Category:SystemWideChange]] -->
 
 
[[Category:SystemWideChange]]
 
[[Category:SystemWideChange]]

Latest revision as of 20:17, 11 December 2019


The GNU C Library version 2.31

Summary

Switch glibc in Fedora 32 to glibc version 2.31.

Owner

Current status

Detailed Description

The GNU C Library version 2.31 will be released at the beginning of February 2020; we have started closely tracking the glibc 2.31 development code in Fedora Rawhide and are addressing any issues as they arise. Given the present schedule Fedora 32 will branch after the GLIBC 2.31 upstream release. However, the mass rebuild schedule means Fedora 32 will mass rebuild (if required) after GLIBC 2.31 upstream freezes ABI for release, but before the actual release, so careful attention must be paid to any last minute ABI changes.

Benefit to Fedora

Stays up to date with latest security and bug fixes from glibc upstream.

Scope

  • Proposal owners: Update glibc to 2.31.
  • Other developers: Developers need to ensure that rawhide is stable and ready for the Fedora 32 branch. Given that glibc is backwards compatible and we have been testing the new glibc in rawhide it should make very little impact when updated, except for the occasional deprecation warnings and removal of legacy interfaces from public header files.
  • Release engineering: #9040
  • Policies and guidelines: The policies and guidelines do not need to be updated.
  • Trademark approval: N/A (not needed for this Change)

Upgrade/compatibility impact

The library is backwards compatible with the version of glibc that was shipped in Fedora 31.

Some packaging changes required, see: https://sourceware.org/glibc/wiki/Release/2.31#Packaging_Changes

We fully expect to fix all packaging changes in Fedora Rawhide given that glibc in Rawhide is tracking what will become glibc 2.31.

How To Test

The GNU C Library has its own testsuite, which is run during the package build and examined by the glibc developers before being uploaded. This test suite has over 6200 tests that run to verify the correct operation of the library. In the future may also run the microbenchmark to look for performance regressions.

User Experience

Users will see improved performance, many bugfixes and improvements to POSIX compliance, additional locales, etc. The glibc 2.31 NEWS update will include more details.

Dependencies

All packages do not need to be rebuilt.

Contingency Plan

  • Contingency mechanism: Given that Rawhide has started tracking glibc 2.31, no show-stopper problems are expected. At this point, we can still revert to upstream version 2.30 if insurmountable problems appear, but to do so may require a mass rebuild to remove new symbols from the ABI/API.
  • Contingency deadline: Upstream ABI freeze deadline of 2020-01-01.
  • Blocks release? Yes, upgrading glibc does block the release. We should not ship without a newer glibc, there will be gcc and language features that depend on glibc being upgraded. Thus without the upgrade some features will be disabled or fall back to less optimal implementations.

Documentation

The glibc manual contains the documentation for the release and doesn't need any more additional work.

Release Notes

The GNU C Library version 2.31 will be released at the beginning of February 2020. The current NEWS notes can be seen here as they are added: https://sourceware.org/git/?p=glibc.git;a=blob;f=NEWS;hb=HEAD