Hi all,
        I've got the latest portage available, V3.4.1, Qt Creator installed.
When I go to start up creator, I get a full screen window frame popping
up, some menu and icon bars around the edge and then, instead of the
text edit pane, I get a "clear" window, I can see the screens wallpaper,
and three dialogues popping up. These dialogues are titled "Welcome Mode
Load Error" and look like the top paragraph of the dialogue shown here:
http://tinyurl.com/o9ax8ml - yes I know this is for a windows bug, but
the dialogue is the same.

        I've tried to track down on the Qt site what the minimal Qt
requirements for Creator are but that was useless - can't find it
anywhere. I then had a look at the Creator ebuild and it says:

# minimum Qt version required
38      QT_PV="5.3.2:5"

This is where it gets interesting. I have not made the jump to Qt 5, but
I can remember a large Qt update recently that had "5" bobbing past
occasionally during the compile process. It was something that I meant
to follow up but haven't. Doing an "eix qt | grep Installed" reveals
that I have a mix of 4.8.7 and 5.4.2. Doing "emerge --info | grep qt"
reveals only "qt3support" and "qt4". No mention of "qt5".

        As this is to do with OpenGl, but I actually suspect this mismatch of
Qt, "eselect opengl list" says nvidia is selected. Re-emerging
nvidia-drivers also says:

***************

* >>> SetUID: [chmod go-r] /opt/bin/nvidia-modprobe ...[ ok ]
Switching to nvidia OpenGL interface... done
 * Removing x11-drivers/nvidia-drivers-352.21 from moduledb.
Switching to nvidia OpenGL interface... done
 * Updating module dependencies for 4.0.5-gentoo ...[ ok ]
 * Adding module to moduledb.
Switching to nvidia OpenGL interface... done
Switching to nvidia OpenCL interface... done
 * USE=tools controls whether the nvidia-settings application
 * is installed. If you would like to use it, enable that
 * flag and re-emerge this ebuild. Optionally you can install
 * media-video/nvidia-settings

***************
So it appears OpenGl is good to go.

        Does anyone have any ideas as to how I can get back to a "pure" Qt4
setup? I've just had a look in /usr/portage/profiles/use.desc and there
is a qt5 in there. Should I do a "-qt5" in make.conf and a new "emerge
-NuD world"?

        Regards,
                Andrew

p.s. Whoever looks after the wiki,

https://wiki.gentoo.org/wiki/Handbook:X86/Working/USE

the section "What USE flags exist" has two links to supposedly online
description - no they don't.


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