Building Qt 5 from Git, some important modules are not installed

Hi all: I’ve installed Qt5 from git according these steps: http://qt-project.org/wiki/Building_Qt_5_from_Git And tried to build a cross compiler for my embedded board: http://www.udoo.org/ProjectsAndTutorials/how-to-build-qt5-for-udoo/?portfolioID=1394 And now, when I checked the ../qtbase/mkspecs/modules, a lot of important modules are not installed. Does anyone have any idea about this situation? Thanks a lot. When I checked my configure command, there is “no-large file” there, but multimedia module is default to build in, so do these two commands conflict？