[Bug 1961324] Re: disable LTO for the new Qt6 stack synced from debian

[Launchpad Bug Tracker]

This bug was fixed in the package lto-disabled-list - 21

---------------
lto-disabled-list (21) jammy; urgency=medium

  [ Rik Mills ]
  * Ignore qt6-* packages showing symbols mismatches when built with lto
    (LP: #1961324)

 -- Gianfranco Costamagna <locutusofborg at debian.org>  Thu, 17 Feb 2022
20:42:19 +0100

** Changed in: lto-disabled-list (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1961324

Title:
  disable LTO for the new Qt6 stack synced from debian

Status in lto-disabled-list package in Ubuntu:
  Fix Released

Bug description:
  qt6-base from debian FTBFS with LTO enabled.

  /tmp/ccS5HXFr.s: Assembler messages:
  /tmp/ccS5HXFr.s: Error: invalid attempt to declare external version name as default in symbol `qt_version_tag@@Qt_6.2'
  make[1]: *** [/tmp/ccPgEgcA.mk:2: /tmp/ccsdSmyc.ltrans0.ltrans.o] Error 1
  make[1]: *** Waiting for unfinished jobs....
  lto-wrapper: fatal error: make returned 2 exit status
  compilation terminated.
  /usr/bin/ld: error: lto-wrapper failed
  collect2: error: ld returned 1 exit status

  The rest of the Qt6 stack on some test builds has some fails and some
  symbols going missing, which mostly go away when when LTO is turned
  off. These are broadly similar issues to those seen for Qt5 in the
  debian LTO enabled test rebuild. It should also be noted that the Qt5
  stack is already in the lto-disabled-list to avoid these errors.

  A few remaining symbols changes (optionals for ppc64el) will need to
  be upstreamed to debian, and then synced.

  List of Qt6 packages:

  qt6-3d
  qt6-5compat
  qt6-base
  qt6-charts
  qt6-connectivity
  qt6-datavis3d
  qt6-declarative
  qt6-imageformats
  qt6-lottie
  qt6-multimedia
  qt6-networkauth
  qt6-positioning
  qt6-quick3d
  qt6-quicktimeline
  qt6-remoteobjects
  qt6-scxml
  qt6-sensors
  qt6-serialbus
  qt6-serialport
  qt6-shadertools
  qt6-svg
  qt6-tools
  qt6-translations
  qt6-virtualkeyboard
  qt6-wayland
  qt6-webchannel
  qt6-webengine
  qt6-websockets
  qt6-webview

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