Removing Qt 4 from Ubuntu before the 20.04 release

Steve Langasek steve.langasek at
Thu Aug 22 23:43:54 UTC 2019

On Thu, Aug 22, 2019 at 06:29:45PM -0500, Simon Quigley wrote:
> I would like to completely remove Qt 4 from the Ubuntu archive before
> the 20.04 release. This includes all of KDE 4 and dependencies.

> The Debian Qt/KDE Team (which I am a part of) is raising the status of
> the Qt 4 removal bugs to RC[1], and since the Qt 6 work is starting
> upstream in the dev branch in the coming months, now is the time for Qt
> 4 to go.

> My timeline for this is to change all of the bugs filed to ask people to
> port[2] to removal bugs, and go over the list of Qt 4 reverse
> dependencies one last time, so the removal can be done at the beginning
> of the 20.04 cycle before the archive opens. This would make 19.10 the
> last release with Qt 4.

> Flavors, please check if Qt 4 is on your ISO, and if it is, make plans
> to remove it as soon as you can. Please hop in #ubuntu-qt if you would
> like help porting your favorite application.

$ apt-cache show libqtcore4 | grep Task
Task: lubuntu-desktop, ubuntustudio-publishing, ubuntustudio-audio, ubuntukylin-desktop, ubuntu-mate-core, ubuntu-mate-desktop

That's still 4 flavors as of today, FTR.

> Does anyone object to this plan?
> [1]
> [2]

Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                         
slangasek at                                     vorlon at
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