[Bug 1814369] Re: update toolchain packages for bionic

[Łukasz Zemczak]

All the bionic-proposed toolchain packages are green and marked as valid
candidates (after ignoring the false-positive linux failures).
Considering this aged and verified.

** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic

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https://bugs.launchpad.net/bugs/1814369

Title:
  update toolchain packages for bionic

Status in eclipse-titan package in Ubuntu:
  Fix Released
Status in gcc-7 package in Ubuntu:
  Fix Released
Status in gcc-7-cross package in Ubuntu:
  Fix Released
Status in gcc-7-cross-ports package in Ubuntu:
  Fix Released
Status in gcc-8 package in Ubuntu:
  Fix Released
Status in gcc-8-cross package in Ubuntu:
  Fix Released
Status in gcc-8-cross-ports package in Ubuntu:
  Fix Released
Status in gcc-defaults package in Ubuntu:
  Fix Released
Status in gcc-defaults-ports package in Ubuntu:
  Fix Released
Status in eclipse-titan source package in Bionic:
  Fix Committed
Status in gcc-7 source package in Bionic:
  Fix Committed
Status in gcc-7-cross source package in Bionic:
  Fix Committed
Status in gcc-7-cross-ports source package in Bionic:
  Fix Committed
Status in gcc-8 source package in Bionic:
  Fix Committed
Status in gcc-8-cross source package in Bionic:
  Fix Committed
Status in gcc-8-cross-ports source package in Bionic:
  Fix Committed
Status in gcc-defaults source package in Bionic:
  Fix Committed
Status in gcc-defaults-ports source package in Bionic:
  Fix Committed
Status in eclipse-titan source package in Cosmic:
  Fix Committed
Status in gcc-7 source package in Cosmic:
  Fix Committed
Status in gcc-7-cross source package in Cosmic:
  Fix Committed
Status in gcc-7-cross-ports source package in Cosmic:
  Fix Committed
Status in gcc-8 source package in Cosmic:
  Fix Committed
Status in gcc-8-cross source package in Cosmic:
  Fix Committed
Status in gcc-8-cross-ports source package in Cosmic:
  Fix Committed
Status in gcc-defaults source package in Cosmic:
  Fix Committed
Status in gcc-defaults-ports source package in Cosmic:
  Fix Committed

Bug description:
  This is a follow-up to LP: #1769657. I'd like to update the toolchain
  packages in bionic, to state which we have in disco in Junuary 2019:

   - gcc-8, update to the gcc-8.3.0 release
   - gcc-7, updates to the gcc-7.4.0 release
   - corresponding gcc-cross packages

  The package builds are prepared in
  https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/ppa/+packages

  [Impact]
  Provide an upstream release for GCC 7, and update GCC 8 to the 8.3.0
  release

  [Regression Potential]
  There is regression potential, however with a test rebuild of the complete archive no regressions were found.

  [Test Case]
  No regressions in the GCC test suite, and no regressions in the test
  rebuild of the main component of the archive (all architectures)

  As a test, a complete archive rebuild was performed, and no
  regressions were found with this new package. The archive rebuild also
  contained updated versions of OpenJDK, OPenSSL, gcc-7, gcc-8,
  python3.6 and python3.7. The OpenJDK, OpenSSL, GCC and Python packages
  should not infer with each other.

  [Validation]
  Analyze the build logs for regressions.
  For the cross builds, just make sure that the packages build using
  the updated sources.

  Summary of the test rebuilds:
  http://people.canonical.com/~doko/ftbfs-report/test-rebuild-20181222-bionic.html
  http://people.canonical.com/~doko/ftbfs-report/test-rebuild-20181222-test-bionic.html

  The first one is a reference build, the second one the test rebuild
  with the updated components.

  An analysis of the build failures was done in
  https://docs.google.com/spreadsheets/d/1tMIwlwoHH_1h5sbvUbNac6-HIPKi3e0Xr8ebchIOU1A/edit#gid=147857652 (Sheet2).

  No regressions attributed to GCC are shown with the test rebuild for
  main, the universe component looks ok, except for packages relying on
  specific GCC versions (ggcov: LP: #1817554), packages needing no-
  change uploads (e.g. eclipse-titan).

  Summary of cosmic test rebuilds (main only):
  http://people.canonical.com/~doko/ftbfs-report/test-rebuild-20190404-cosmic.html
  http://people.canonical.com/~doko/ftbfs-report/test-rebuild-20190404-gcc8-cosmic.html

  One regression, pcre3, needing the same fix as the version in disco,
  marking one more symbol is optional in the symbols file.

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