What GTK version do I need to run SWT?
A: SWT requires the following GTK+ versions (or newer) to be installed:

Eclipse/SWT 3.8.x and newer: GTK+ 2.6.0 and its dependencies
Eclipse/SWT 3.6.x - 3.7.x: GTK+ 2.4.1 and its dependencies
Eclipse/SWT 3.0.x - 3.5.x: GTK+ 2.2.1 and its dependencies
Eclipse/SWT 2.1.x: GTK+ 2.0.6 and its dependencies

You can determine which version of GTK you are running with rpm -q gtk2.
[test]$ rpm -q gtk2
gtk2-2.10.4-21.el5_7.7
gtk2-2.10.4-21.el5_7.7