Hi.
There is a lot of whining on #crux that Qt5 port is broken (someone suggested to nuke Qt4 because 'that's the way Arch does it'.Heh.)
Interestingly enough, upstream has a solution for just this situation (more than one Qt version).
It is "Qt Chooser - Tool to quickly switch between multiple Qt installations."[1]
There is a simple port attached to FS task I opened a while back, using (now ancient) version of it.[2]
Usage is simple enough:
-Qt4 is the default, so any port that depends only on it builds OOTB.
-If an app depends on Qt5, or it can use either, one extra line is needed in the Pkgfile (two, if it uses cmake instead of configure and friends):
----
export QT_SELECT=qt5
export CMAKE_PREFIX_PATH=/usr/share/qt5
----
I've been using it a while, and it JustWorks[tm]
So, considering that Qt4 is nowhere near being dead, and there will be the need for both versions in opt for quite some time,
I humbly suggest adding qtchooser to opt.
[1]https://code.qt.io/cgit/qt/qtchooser.git/
[2]https://crux.nu/bugs/index.php?do=details&task_id=1056
Pedja
