how to build the Energy Monitor Qt application. Install packages and clone the source code. # sudo apt-get install qt4-default libqwt-dev # git clone https://github.com/john1117/EnergyMonitor.git Create a project file. # qmake -project Add below CONFIG line in the project file. # vi EnergyMonitor.pro ######... ######CONFIG += qwt ######... Make! # qmake # make -j8