Required and supported Qt versions

[Ben Cooksley]

On Tue, Dec 30, 2014 at 10:02 PM, David Faure <faure at kde.org> wrote:
> On Tuesday 30 December 2014 21:50:40 Ben Cooksley wrote:
>> On Tue, Dec 30, 2014 at 9:47 PM, David Faure <faure at kde.org> wrote:
>> > On Tuesday 30 December 2014 21:41:10 Ben Cooksley wrote:
>> >> We test the variants noted by "kf5-qt5" and "stable-kf5-qt5" in the
>> >> build metadata for Qt.
>> >
>> > Yes - the (implicit) question was, what version of Qt do these point to
>> > ;-)
>>
>> kf5-qt5 = Qt 5.3.x
>> stable-kf5-qt5 = Qt "stable"
>
> Ah.
> Note that Qt no longer uses the branch called "stable", so it got stuck at
> some version between 5.3.1 and 5.3.2.
>
> So it seems to me that both of these configurations test pretty much the same
> thing, which seems a bit pointless :-)
>
> Maybe stable-kf5-qt5 should point to Qt 5.2. i.e. redefining "stable" as "min
> version". But then it will have to stop at frameworks, since e.g. plasma-
> desktop requires Qt 5.3. (Not sure why, since it builds fine with 5.2, but I
> guess this is about some runtime behavior issue? fd636f964d94 in plasma-
> desktop didn't give a reason).

That is certainly one possibility.

>
> But anyway: I'm fine with plasma requiring Qt 5.3. The target audience is
> different from frameworks, which aims at developers outside the KDE community,
> some of which might be still using 5.2 (e.g. in companies where dependencies
> are only upgraded once in a blue moon).
>
> Alternative: build.kde.org could be testing 5.3 and 5.4.

That is probably the best thing we could do at this point.

Only way I see of being able to test Qt 5.2 would involve more job
duplication at the moment (and building a 3rd copy of Qt 5).

>
> Anyhow, nothing critical here.

If someone would be interested in working on the build metadata
specifications to come up with a proposal which would allow us to
accomodate builds such as the ones David has described while still
being able to support what Plasma needs for their master/stable
combinations, please get in touch with me.

>
> --
> David Faure, faure at kde.org, http://www.davidfaure.fr
> Working on KDE Frameworks 5
>

Thanks,
Ben