just found that at least symbols from QList<double> are exported to EsriRuntimeQt.dll/EsriRuntimeQtd.dll.
As soon as for example "ResolutionList.h" is included, a class with e.g. a QList<double> member will lead to linker errors because of multiple defined symbols. I 've attached a minimal example. Had to force to ignore multiple defined symbols with
QMAKE_LFLAGS += /FORCE:MULTIPLE
to link properly, which is not what one wants to do!
Seams that something went wrong compiling the windows binaries...