Good Day,
Today I tried to install Unreal Engine 4 on my linux.
On my system one lib is missing, but im not sure in wich peakge it is.
The peakge is missing when i make the Slateviewer
The error message:
That is LinuxNativeDialogs, a wrapper around GTK/Qt for the file open/save/font dialogs. You should try installing with gtk3-dev or qt4-dev(I think it also supports qt5) and rerunning BuildThirdParty.sh.
Quick Edit: Us Linux users are in #UE4Linux on irc.freenode.net.