libgtk-3-0-dbg 3.8.7-0ubuntu1 (arm64 binary) in ubuntu trusty

 GTK+ is a multi-platform toolkit for creating graphical user
 interfaces. Offering a complete set of widgets, GTK+ is suitable
 for projects ranging from small one-off tools to complete application
 suites.
 .
 This package contains detached debugging symbols.
 .
 Most people will not need this package.