wxGTK is part of wxWidgets, a cross-platform API for writing GUI applications on multiple platforms that still utilize the native platform's controls and utilities. This is a unicode shared build. If you do not want the unicode build, use: UNICODE=NO ./wxGTK.SlackBuild If you want to include the media library, which provides bindings for gstreamer, you will need to install GConf first. This package conflicts with wxPython because wxGTK is already included there. Both cannot be installed at the same time!