I am also interested in this issue. I believe that statically linking the QtUiTools.lib into a closed source application would be a violation of the LGPL. But, I wonder if it is possible to work around that by manually creating a shared library that consists only of QUiLoader. The quiloader.h header file would have to be modified to include the correct QT shared library export macros. I wonder if simply modifying the header file in this manner would violate the LGPL.