A native style to bend Qt4 and Qt5 applications to look like they belong into GNOME Shell.
The project uses the standard CMake buildsystem.
So for example, the whole compilation process could look like this:
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr ..
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 Inspire parameter.