https://bugs.kde.org/show_bug.cgi?id=407235

--- Comment #19 from caulier.gil...@gmail.com ---
Maik, 

The reason to upgrade Qt from 5.7 to 5.11.3 is to support the new KF5 which
requires Qt 5.10 since 5.56. We use now KF5.57 (and last one is just out:
5.58).

Upgrading Qt as a main influence on minimal MacOS support. Look my note here :

https://cgit.kde.org/digikam.git/tree/project/bundles/macports/config.sh#n18

This is a corresponding backward compatibility with MacOS and Qt that i have
experimented. This is not really what Qt team give, because we don't compaile
the whole Qt for digiKam (for ex QML is not necessary).

So the values differ a we can have a large spectre of compatibility, but as you
can see, we have switched from MacOS 10.8 to 10.11.

I tried with lesser MacOS version with Qt 5.11.3, but there are few linking
problems, not resolved by Macports project with patches. I already reported
this problem in Macports bugzilla, but the response is clear : there are not
enough developers to increase the MacOS backward compatibility with more recent
Qt5.

VoilĂ 

Gilles

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