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* Tracker bug: [https://bugzilla.redhat.com/show_bug.cgi?id=1288078 #1288078]
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* Tracker bug:
  
 
== Detailed Description ==
 
== Detailed Description ==

Latest revision as of 11:02, 20 July 2016


Fedora 25 Boost 1.61 upgrade

Summary

This change brings Boost 1.61.0 to Fedora 25. This will mean F25 ships with the latest upstream Boost release.

Owner

Current status

  • Targeted release: Fedora 25
  • Last updated: 2016-07-20
  • Tracker bug:

Detailed Description

The aim is to synchronize Fedora with the most recent Boost release. Because ABI stability is one of explicit Boost non-goals, this entails rebuilding of all dependent packages. This has also always entailed yours truly assisting maintainers of client packages in decoding cryptic boost-ese seen in output from g++. Such care is to be expected this time around as well.

Boost 1.60 was released on May 13th, 2016. It's possible that 1.62.0 will be released early enough in the F25 schedule to rebase on that instead, with beta releases available for testing in advance.

The equivalent changes for previous releases were Fedora 22 Change and Fedora 23 Change and Fedora 24 Change.

Benefit to Fedora

Fedora will stay relevant, as far as Boost clients are concerned. Boost 1.61 brings four new libraries:

  • Boost.Compute: Parallel/GPU-computing library
  • Boost.DLL: A library for comfortable work with DLLs and DSOs.
  • Boost.Hana: A modern C++ metaprogramming library.
  • Boost.Metaparse: A library for generating compile-time parsers for embedded DSL code.


Scope

  • Proposal owners:
    • Build will be done with Boost.Build v2 (which is upstream-sanctioned way of building Boost)
    • Request a "f25-boost" build system tag (discussion): https://fedorahosted.org/rel-eng/ticket/6235f24-boost
    • Build boost into that tag (take a look at the build #606493 for inspiration)
    • Post a request for rebuilds to fedora-devel (XXX link to fedora-devel message here)
    • Work on rebuilding dependent packages in the tag.
    • When most is done, re-tag all the packages to rawhide
    • Watch fedora-devel and assist in rebuilding broken Boost clients (by fixing the client, or Boost).


  • Other developers:
    • Those who depend on Boost DSOs will have to rebuild their packages. Feature owners will alleviate some of this work as indicated above, and will assist those whose packages fail to build in debugging them.
  • Release engineering:
    • Side tag creation.
  • Policies and guidelines:
    • Apart from scope, this is business as usual, so no policies, no guidelines.
  • Trademark approval:
    • N/A (not needed for this Change)

Upgrade/compatibility impact

  • No impact on system upgrade.
  • Some impact on other packages. Historically this hasn't been too big of a problem and could always be resolved before deadline.

How To Test

  • No special hardware is needed.
  • Integration testing simply consists of installing Boost packages (yum install boost) on Fedora and checking that it does not break other packages (see below for a way to obtain a list of boost clients).

User Experience

Expected to remain largely the same.

Dependencies

Packages that must be rebuilt: $ repoquery -s --releasever=rawhide --whatrequires libboost\* --disablerepo=* --enablerepo=fedora | sort -u

All clients: $ repoquery --releasever=rawhide --archlist=src --whatrequires boost-devel --disablerepo='*' --enablerepo=fedora-source

Contingency Plan

  • Contingency mechanism: worst case scenario is to abandon the update and simply ship F25 with Boost 1.60, which is already in rawhide.
  • Contingency deadline: We will know whether the change can be made once the rebuilds in the side tag are done, which is likely to be some time in July.
  • Blocks release? No
  • Blocks product? None

Documentation

Release Notes

Boost has been upgraded to version 1.61. Apart from a number of bugfixes and improvements to existing libraries, this brings four new libraries compared to Fedora 24, Boost.Compute, Boost.DLL, Boost.Hana and Boost.Metaparse.