qmake -install qinstall will ignore the hidden directory and files.

Execute the command  "qmake -install qinstall /tmp/sourcedir /tmp/dest", if hidden  directory or files (such as /tmp/sourcedir/.test) contained in /tmp/sourcedir, the directory and files will be ignored and will not be installed to /tmp/dest.

As my seek, It caused in  the installFileOrDirectory() of qbase/qmake/main.cpp.

QDirIterator it(source, QDir::AllEntries | QDir::NoDotAndDotDot);

It should be QDirIterator it(source, QDir::AllEntries | QDir::NoDotAndDotDot | QDir::Hidden);