[mythtv-users] Upgrade from qt 5.4.2 to qt 5.5.1

[Roger Siddons]

On 16/02/16 14:29, Peter Bennett (cats22) wrote:
> On 02/15/2016 10:09 PM, Mike Hodson wrote:
>>
>> On Mon, Feb 15, 2016 at 7:31 PM, Peter Bennett (cats22) 
>> <cats22 at comcast.net> wrote:
>>
>>     I am on wily and trying to test mythtv 0.28. It seems the below
>>     error is caused by a qt 5.4.2 bug. I tried downloading the qt
>>     5.5.1 binary installer from qt.io <http://qt.io>, but that
>>     installs into /opt/Qt5.5.1. I pointed LD_LIBRARY_PATH at
>>     /opt/Qt5.5.1/5.5/gcc_64/lib where the libraries are, and ran the
>>     backend. The backend fails with "error while loading shared
>>     libraries: libgstapp-0.10.so.0: cannot open".
>>
>>
>>
> Thanks for the suggestion. I got the gstreamer 0.10 installed, then I 
> get a different error. First it said "QSqlDatabase: QMYSQL driver not 
> loaded". I added environment string "export 
> QT_PLUGIN_PATH=/opt/Qt5.5.1/5.5/gcc_64/plugins". Now it gets "Unable 
> to create database object (DBManager0), the installed QT driver may be 
> invalid".
>
AIUI the 5.5.1 binary is built for Debian so many of the dependency 
library versions are different.
To diagnose the SQL one try 
https://forum.qt.io/topic/59449/solved-with-guide-qsqldatabase-qmysql-driver-not-loaded-build-mysql-plugin-linux-ubuntu

An easier way of installing would be to use 
https://launchpad.net/~canonical-qt5-edgers/+archive/ubuntu/backup-qt551 
<https://launchpad.net/%7Ecanonical-qt5-edgers/+archive/ubuntu/backup-qt551>
I haven't tried it though.
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