A native style to bend Qt4 and Qt5 applications to look like they belong into GNOME Shell.
The project uses the standard CMake buildsystem.
It is advised to override the LIB_SUFFIX CMake variable to handle the /usr/lib vs /usr/lib64 installation correctly.
So for example, when packaging a 64bit package, the process would be similar to this:
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr -DLIB_SUFFIX=64 ..
make
make install
After install, you'll be able to either set the theme as your default via your DE's tools (like systemsettings or qt-config) or start your qt applications with the -style highcontrast parameter.