Currently, when compiling marble all marble apps are compiled, so I have on my system (v1.12): marble marble-qt marble-touch marble-mobile As I'm on a desktop with KDE, I don't need marble-touch, marble-mobile and marble-qt at all. If someone is a user of another platform the same problem occurs the other way around. So please provide a build option to build only one (or more) of these apps.
Cross reference: https://bugs.gentoo.org/show_bug.cgi?id=561572
Related, though not doing exactly what you're asking for: https://quickgit.kde.org/?p=marble.git&a=tree&hb=407a29c You should end up with marble, marble-qt and marble-maps now. The latter kind of replaces marble-touch and marble-mobile. We do not provide a .desktop file for it though, so there should be a little less confusion now.