checking for xcb... yes.
checking for xcb-syslibs... no.
The test for linking against libxcb and support libraries failed!
You might need to install dependency packages, or pass -qt-xcb.
See src/plugins/platforms/xcb/README.
sudo apt-get install libxcb*
不知道需要什么,全装了,40多M,不缺少这点空间。OK