a new qt4 package has hit [testing] and will replace the current qt package.
qt4 doesn't provide 'qt'; you will need to rebuild EVERY package installed
from AUR and replace qt with qt4 in the depends array.
Also, I suggest to every maintainer in AUR to remove qt from the depends()
array when there's qtwebkit or any package that needs qt: if you do that, this
will require no rebuild as we updated every package in the official
repositories to use qt4.
Also, we ship the Qt 5.x series in [testing]. Qt 5.x is more modular than 4.x.
This allow us to have these Qt 5.x packages:
Generally you only need qt5-base. But, if you are a Qt developer or you want a
full installation you can install the whole 'qt' group.
When you install both qt5-base and qt4, qmake will refers to the 5.x version.
To 'force' Qt 4.x, you can use the qmake4 symlink. There's also moc-qt4, uic-
qt4 and rcc-qt4. We provide these symlinks as they are used by cmake and by
the configure scripts to locate qt4.
Arch Linux Developer