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Is Qt binary compatible?
Qt is backwards binary and source compatible within each major release. This means that a program linked dynamically to e.g Qt 4.5.1 will continue running with Qt 4.5.3 without the need to recompile. Qt is not binary compatible between major versions such as Qt 2.x, Qt 3.x and Qt 4.x etc. Qt is also not forwards compatible, meaning that applications created with a newer version of Qt will not necessarily run or compile against older Qt versions.
3 comments
December 3, 2010
Lab Rat
Will this be still applicable. I found some issues with QML. Older scripts not running.
May 6, 2011
Lab Rat
Qt is still binary compatible after Qt Quick was released. QML scripts are not linked to binary compatibility but should still be source compatible in the same way Qt is. If you are experiencing bugs regarding this, then please report them here:
http://bugreports.qt.nokia.com
December 20, 2012
Lab Rat
This page has been created to better address this question: http://qt-project.org/wiki/Qt-Version-Compatibility