[Development] Qt’s UWP backend will be dropped in Qt 6
oliver.wolff at qt.io
Wed Jul 8 06:19:42 CEST 2020
with Qt 6 approaching it is time to have a look at our set of supported
One candidate for removal of support was our port for Microsoft's
Universal Windows Platform (UWP). Some considerations about dropping
this support have been communicated on Qt's development mailing list in
April last year  and there were some discussions about this topic on
the corresponding bug report 
During this year's Microsoft Build conference Microsoft announced the
unification of Win32 and UWP for their IoT offering. In general, it
looks like Microsoft is stepping away from their strict stance about the
usage of UWP technology and the Windows Store. Getting a classic Windows
application into the Windows Store is much easier nowadays and will be
even simpler in the future. Microsoft's new direction in their IoT
offering will bring more "classic Windows development" into the IoT
world and there will be no need for a dedicated UWP port.
With this official Microsoft standing in mind our current plan is to
drop our dedicated UWP platform backend for Qt 6. According to these
plans the last Qt version that will support "native Qt UWP application"
will be Qt 5.15.
There are two main reasons for this decision:
- The number of bug reports for the port as well as the company's user
data indicate that there is not much interest in the port.
- Keeping the port alive and up to date is a big effort (I will spare
the details but can of course elaborate further if there is interest).
The company decided developers' time is better spent in other areas. By
dropping the dedicated UWP port the company's Windows developers can
concentrate on our "classic" win32 port and other areas that didn't get
the attention they needed.
All in all, we hope that dropping support for the UWP port will result
in higher quality for other parts of Qt. From the company's point of
view this benefit outweighs the "reduced cross-platformness of Qt" as
the port is not used that much anyway.
Backends that use UWP APIs (bluetooth, sensors and positioning for
example) are not affected by this decision and there will most likely be
additional backends that use new MS technology.
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