Checklist for Qt 6.0 inclusion

Qt 6 will introduce a lot of changes when compared to Qt 5. To begin with, Qt 6 requires C++17 which by itself excludes some compilers which were supported by Qt 5. Other changes are related to APIs, the build system (move from qmake to cmake as Qt's internal build system) or general infrastructure changes in the CI and test setup. Given the deadline for the Qt 6.0 release at the end of 2020, it is likely that not all Qt modules will be ready for the deadline set by the 6.0 release schedule.

Ready-For-Qt6-Inclusion

The general list of Qt release criteria (e.g. string freeze, API reviews done, branching) as outlined by the general releases notes of every Qt 5 release (e.g. release wiki for Qt 5.14) shall continue to apply. However those deadlines and gate criteria are considered to be as "too late" to make the final decision for inclusion. Therefore the notion of an earlier "Ready-for-Qt6-inclusion" checkpoint is being introduced. The current time suggestion for this checkpoint is end of June 2020. A more precise timeline will be suggested later on. Stay tuned.

During this earlier checkpoint each module is assessed against the criteria set out below. It is the maintainers responsibility to ensure that the data is provided for their module on this wiki page. The received feedback is used to evaluate the readiness of each individual module and in turn the readiness of Qt 6. It may also be used to define the list of Qt modules which are on track and may constitute a sufficiently large but nevertheless reduced set of Qt modules ready for Qt 6.0. If the set is deemed too small other considerations such as a delayed release schedule or feature drop may be considered.

If the release criteria are not met/stated maintainers may choose to release their module via the next minor release after 6.0 in the series.

Deadline

We want to have clarity on the list of 6.0 modules by end of June. Adding two weeks of deliberations based in the feedback implies that the 15. June 2020 is the deadline for the module data. To avoid dragging the process out due to missing information, no response implies the module is automatically not included in Qt 6.0.

Release Criteria

• Port to cmake on target for completion
  • Target definition:
    • Library, examples & tests have been ported
    • The module is built & tested in the CI using cmake and tests pass
• Continuous Integration for Qt 6
  • CI runs against qtbase/qtdeclarative SHA no older than 2 weeks
  • git repo is part of regular submodule update bot runs in dev (qt5.git/.gitmodules status != ignore)
  • Works with the supported platforms in CI for Qt 6.0
• Backlog trajectory
  • Link to Jira stating the not completed and completed Qt 6.0 development tasks
• Reviews
  • Initial review of public API done (is maintainer aware of/happy with the current state?)
  • Are the API changes on track measured against the expectations
• Porting/Documentation information available
  • Simple list of completed API changes which may later be used to write Qt6 migration docs
• Other open comments serving as extenuating circumstances

Status per Module

Review Template

Module Name

Status Summary	Not Ready
Cmake port	Not Complete (<Missing part>)
Jira backlog	JIRA-TICKET
Recent CI SHA	No
gitmodules/submodule bot	ignored
Comments/Circumstance

State of Essential Modules

Note that the list of essential modules may be revised in light of Qt 6.0.

Qt Core

Status Summary	Ready
Cmake port	Complete
Jira backlog	QTBUG-71036
Recent CI SHA	Yes
gitmodules/submodule bot	N/A (qtbase).
Comments/Circumstance	Definition of Ready is relative to QtCore!

Qt GUI

Status Summary	Ready
Cmake port	Complete
Jira backlog	QTBUG-72560
Recent CI SHA	Yes
gitmodules/submodule bot	N/A (qtbase).
Comments/Circumstance

Qt Network

Status Summary	Ready
Cmake port	Complete
Jira backlog	QTBUG-75638
Recent CI SHA	Yes
gitmodules/submodule bot	N/A (qtbase).
Comments/Circumstance

Qt Quick

Status Summary	Ready
Cmake port	Complete
Jira backlog
Recent CI SHA	Yes
gitmodules/submodule bot	Yes
Comments/Circumstance	Purging the legacy direct OpenGL rendering bits is on-going

Qt Quick Controls 2

Status Summary	Ready
Cmake port	Complete
Jira backlog	QTBUG-82256
Recent CI SHA	Yes
gitmodules/submodule bot	Yes
Comments/Circumstance

Qt Quick Dialogs

Status Summary	Not Ready
Cmake port	Not started
Jira backlog
Recent CI SHA	Yes
gitmodules/submodule bot	N/A (qtquickcontrols).
Comments/Circumstance	Qt Quick Dialogs still live in the Qt Quick Controls 1 repository, which will not be part of Qt 6. Code needs to be moved over to Qt Quick Controls 2 or into a separate repository, and ported to Qt Quick Controls 2. Dialogs in Qt Quick Controls 2 are however very limited (popup panes within the window, not independent top level windows)

Qt SQL

Status Summary	Ready
Cmake port	Complete
Jira backlog	N/A
Recent CI SHA	Yes
gitmodules/submodule bot	N/A (qtbase)
Comments/Circumstance

Qt Widgets

Status Summary	Not Ready
Cmake port	Complete
Jira backlog	QTBUG-69410
Recent CI SHA	Yes
gitmodules/submodule bot	N/A (qtbase).
Comments/Circumstance	Still some issues left

State of Add-on Modules

Qt Android Extras

Not included in Qt 6.0. Will find new home in the more relevant modules over time, and the remaining APIs considered included in later 6.x releases.

Qt Bluetooth

Status Summary	Not Ready
Cmake port	Complete (not yet enabled in CI)
Jira backlog	QTBUG-62877
Recent CI SHA	No
gitmodules/submodule bot	ignored
Comments/Circumstance

Qt Mac Extras

Not included in Qt 6.0. Will find new home in the more relevant modules over time, and the remaining APIs considered included in later 6.x releases.

Qt OpenGL

Note, the contents of this module is different in Qt 6 compared to Qt 5. The old, deprecated, Qt 4 era QGL* classes are removed. Now it contains the QOpenGL* classes.

Status Summary	Ready
Cmake port	Complete
Jira backlog
Recent CI SHA	Yes
gitmodules/submodule bot	N/A (qtbase).
Comments/Circumstance

Qt OpenGL Widgets

Note, new in Qt 6. Contains QOpenGLWidget, which used to live in Qt Widgets in Qt 5.

Status Summary	Ready
Cmake port	Complete
Jira backlog
Recent CI SHA	Yes
gitmodules/submodule bot	N/A (qtbase).
Comments/Circumstance

Qt Platform Headers

Will become private API in 6.0

Qt Quick 3D

Status Summary	Ready
Cmake port	Complete
Jira backlog
Recent CI SHA	Yes
gitmodules/submodule bot	Yes
Comments/Circumstance

Qt Quick Controls 1

Note, this module is deprecated in Qt 5.15 and therefore may no longer be shipped in Qt 6.

Qt Quick Timeline

Status Summary	Ready
Cmake port	Complete
Jira backlog
Recent CI SHA	Yes
gitmodules/submodule bot	Yes
Comments/Circumstance

Qt Quick Widgets

Note, this module (and so QQuickWidget) is supported for OpenGL and the 'software' scenegraph backend in Qt 6.0, i.e. what Qt 5 supports. It is not compatible with other graphics APIs.

Status Summary	Ready
Cmake port	Complete
Jira backlog
Recent CI SHA	Yes
gitmodules/submodule bot	N/A (qtdeclarative).
Comments/Circumstance

Qt Remote Objects

Status Summary	Not Ready
Cmake port	Not Complete (Needs more testing)
Jira backlog	QTBUG-84590
Recent CI SHA	Yes
gitmodules/submodule bot	ignored
Comments/Circumstance	In progress, but at risk of making 6.0 if binary incompatible changes to the module cannot be contained in time

Qt Script

Note, this module is deprecated in Qt 5.15 and therefore may no longer be shipped in Qt 6.

Qt Script Tools

Note, this module is deprecated in Qt 5.15 and therefore may no longer be shipped in Qt 6.

Qt Shader Tools

Note, new in Qt 6.

Status Summary	Ready
Cmake port	Complete
Jira backlog
Recent CI SHA	Yes
gitmodules/submodule bot	Yes
Comments/Circumstance

Qt Virtual Keyboard

Status Summary	Not Ready
Cmake port	Not Complete (QTBUG-84324)
Jira backlog	QTBUG-84322
Recent CI SHA	Yes
gitmodules/submodule bot	Yes
Comments/Circumstance

Qt WebEngine

Not included in Qt 6.0.

Qt Windows Extras

Not included in Qt 6.0. Will find new home in the more relevant modules over time, and the remaining APIs considered included in later 6.x releases.

Qt X11 Extras

Not included in Qt 6.0. Will find new home in the more relevant modules over time, and the remaining APIs considered included in later 6.x releases.

Qt XML Patterns

Note, this module is deprecated in Qt 5.15 and therefore may no longer be shipped in Qt 6.

Qt X11 Extras

Not included in Qt 6.0. Will find new home in the more relevant modules over time, and the remaining APIs considered included in later 6.x releases.