[Development] Merging wip/qt6 to dev

[Simon Hausmann]

Hi,

Finally all changes from wip/qt6 have been merged into dev for all modules. I've filed QTQAINFRA-3273 for the Gerrit admins to close the branch. There are still open pending changes in some repos, please take a look at

    https://codereview.qt-project.org/q/owner:self+branch:wip/qt6+status:open

to see if you have any pending changes that need to be re-targeted or abandoned.

The dependencies.yaml propagation is almost through, webengine and webview are pending.

Simon
________________________________
From: Simon Hausmann <Simon.Hausmann at qt.io>
Sent: Wednesday, October 2, 2019 15:57
To: Qt development mailing list <development at qt-project.org>
Subject: Re: [Development] Merging wip/qt6 to dev

Hi,

Here's a new update on the merge of wip/qt6 to dev:

The culprit that broke the Windows 7 tests has been identified, a fix (revert) merged into qtbase 5.15 and merged up to dev. Unfortunately qtdeclarative is still failling because for declarative the CI configuration adds developer-build enabled tests on armv7 and armv8 -- to cover issues we've had in the past in the JIT on these platforms. That configuration will make the CI implicitly also run tests in qtbase for armv7/armv8 with -developer-build and those are failing suddenly (qtextmarkdownwriter).



Simon
________________________________
From: Simon Hausmann <Simon.Hausmann at qt.io>
Sent: Thursday, September 26, 2019 13:07
To: Qt development mailing list <development at qt-project.org>
Subject: Re: [Development] Merging wip/qt6 to dev

Hi,

Brief update on the status of the merge:

After qtbase, the direct leaf modules such as qtsvg, qtimageformats, etc. were merged. What's left is qtdeclarative and everything that depends on it. While the actual merge of wip/qt6 went through for qtdeclarative, the combination of current dev qtbase and declarative produce several failing tests on Windows 7. This is tracked in QTBUG-78742 and I haven't found out yet what change in qtbase causes the failures on Windows ;(. Initially I thought of excluding just the one failing test, but as there are several failing tests this indicates that something is quite broken.


Simon
________________________________
From: Simon Hausmann <Simon.Hausmann at qt.io>
Sent: Wednesday, September 18, 2019 11:47
To: Lars Knoll <lars.knoll at qt.io>
Cc: Qt development mailing list <development at qt-project.org>
Subject: Re: [Development] Merging wip/qt6 to dev

Hi,

Okay, qt5's dev branch has now a slightly reduced configuration set and qtbase wip/qt6 was merged to dev. So qtbase dev now has QT_VERSION set to 6.0.0.

>From this point on, I'll try to drive the merges and updates of the remaining modules using the new module pinning.

Simon
________________________________
From: Lars Knoll <lars.knoll at qt.io>
Sent: Tuesday, September 17, 2019 10:03
To: Simon Hausmann <Simon.Hausmann at qt.io>
Cc: Qt development mailing list <development at qt-project.org>
Subject: Re: [Development] Merging wip/qt6 to dev

I’d say yes, let’s merge those into dev as well. Those are all platforms we don’t want to support in Qt 6.0. (tvOS, watchOS and Integrity might come back at some point).

Cheers,
Lars

On 17 Sep 2019, at 09:56, Simon Hausmann <Simon.Hausmann at qt.io<mailto:Simon.Hausmann at qt.io>> wrote:


I'm leaning towards the same.

Regarding the overall merge, there is one other change that needs to happen before we can have a chance at building qtbase:

In the wip/qt6 branch in commit 5677a43a25a9dc1a3151e6b28cbf9fe015a1aff4 in qt5.git, various platforms and configurations were removed from the CI:

    * MSVC2015
    * Some MSVC 2017 configurations
    * macOS 10.12, macOS 10.13
    * TvOS, WatchOS
    * Integrity


What shall we do about this? Merge the reduction also into dev?


Simon
________________________________
From: Lars Knoll <lars.knoll at qt.io<mailto:lars.knoll at qt.io>>
Sent: Tuesday, September 17, 2019 9:15
To: Simon Hausmann <Simon.Hausmann at qt.io<mailto:Simon.Hausmann at qt.io>>
Cc: Qt development mailing list <development at qt-project.org<mailto:development at qt-project.org>>
Subject: Re: [Development] Merging wip/qt6 to dev

Hi,

Great to get the wip/qt6 branches merged back into dev. I’d simply try to take the dependencies.yaml into use at the same time instead of having to work around the CI.

Cheers,
Lars

On 17 Sep 2019, at 09:05, Simon Hausmann <Simon.Hausmann at qt.io<mailto:Simon.Hausmann at qt.io>> wrote:

Hi,

Now that the Qt 5.15 branches exist and dev is intended to become Qt 6.0.0, the time has come to begin merging the wip/qt6 branches into dev. A wip/qt6 branch has been created for pretty much all repositories in qt6.git that are active (essential, addon, etc.) and two types of changes have been pushed into these branches:

    * Update .qmake.conf to bump the module version to 6.0.0.
    * Compile fixes after the initial round of source incompatible changes to qtbase -- most about endl, hex, etc. now always being in the Qt namespace.

qtdeclarative has seen a few more changes on the Qml side regarding the module structure and loading. Those were coordinated with Ulf and Fabian.


So unless somebody can think of a good reason, it is time to begin merging the wip/qt6 branches to dev for each repository. This may require a force push due to the dependency on a newer qtbase and the newer qtbase by itself not making it through qt5. At the same time, perhaps it would make more sense to add dependencies.yaml files (see other email in the  Qt6 and modules thread from today) while we're at it.




Simon
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