Revision control
++ HEADERS = glwidget.h \
++ window.h \
++ mainwindow.h \
++ logo.h
++ SOURCES = glwidget.cpp \
++ main.cpp \
++ window.cpp \
++ mainwindow.cpp \
++ logo.cpp
++
++ QT += widgets opengl openglwidgets
++
++ # install
++ target.path = $$[QT_INSTALL_EXAMPLES]/opengl/hellogl2
++ INSTALLS += target