Standard Qt support for Enterprise licensees is for 2 years after the next minor or major Qt release is available. For Qt 4.8 it would mean support ending in December 2014, but we have decided to extend it with a full year more to allow seamless migration to Qt 5.
Originally the support for Qt 4.8.x would have ended on 19th December 2014, 2 years after Qt 5.0.0 was released. We are now extending the standard support for 1 more year, meaning that it will not reach end of life until 19th December 2015. By then Qt 4.8 has been supported for four years as Qt 4.8.0 was released on 15th December 2011 and was superseded by Qt 5.0.0 on 19th December 2012. Subsequently we now plan to have a Qt 4.8.7 release in Q1 2015. This is planned to be the last release of Qt 4.8.x series, unless there is a need to provide an update due to a critical security issue.
So what does this mean for you? Well if you are entitled to support then it means you can still use Qt 4.8.x safe in the knowledge that you will get the same level of support as before until the 19th December 2015. For older versions then we do have an extended lifetime option which you can find more information about by contacting The Qt Company sales.
We recommend that applications are ported to Qt 5.x as there are new versions of operating systems and compilers coming out which we can’t guarantee will be supported 100% by Qt 4.8. Qt 5 is a solid platform to migrate to with already version Qt 5.4 coming out soon. Therefore now is the time to start seriously considering to port any existing applications if you haven’t already started doing so. Porting to Qt 5 is pretty straightforward and the documentation at http://qt-project.org/doc/qt-5/portingguide.html will help with that. If you need help, we and our service partners have services available for porting too – more information can be found at http://www.qt.io/services/.