Requiring Qt 5.15 for KDE Frameworks 5?

Nicolás Alvarez nicolas.alvarez at
Sat Mar 27 16:07:14 GMT 2021

> El 27 mar. 2021, a la(s) 12:30, Fabian Vogt <fabian at> escribió:
> Moin,
> Am Samstag, 27. M?rz 2021, 14:11:38 CET schrieb David Faure:
>>>>> On samedi 27 mars 2021 12:51:37 CET Kai Uwe Broulik wrote:
>>>> Hi everyone,
>>>> during the ongoing KDE Frameworks 6 sprint we were just contemplating
>>>> whether we can bump the required Qt dependency for Frameworks 5 to Qt 5.15.
>>>> Reason being that Qt 5.15 includes a set of porting aids and
>>>> forward-compatibility with Qt 6, such as version-less "Qt" rather than
>>>> "Qt5" CMake target, various QStringView-related features, and so on.
>>>> We would like to start working on KDE Frameworks 6 on Qt 6 but still
>>>> keep Frameworks 5 supported with as little overhead as possible, i.e.
>>>> not having a gazillion ifdefs or even dedicated branch, which we would
>>>> likely need, should we have to continue supporting Qt 5.14 in the process.
>>>> Are there any objections or concerns or potential release schedule
>>>> conflicts if we did that?
>> While at it, can we also get your feedback on
>> * Requiring C++17
> Which for GCC means at least g++ 9 in practice due to std::filesystem?

I think we need to be more specific and say what is the minimum compiler version. Maybe we can set g++8 as the minimum and use C++17 language features while avoiding std::filesystem.

But only if someone actually cares about keeping gcc8 support :)


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