glew {
  # Optionally specify location of GLEW using the 
  # GLEWDIR env. variable
  GLEW_DIR = $$(GLEWDIR)
  !isEmpty(GLEW_DIR) {
    QMAKE_INCDIR += $$GLEW_DIR/include
    QMAKE_LIBDIR += $$GLEW_DIR/lib
    message("GLEW location: $$GLEW_DIR")
  }

  unix:LIBS += -lGLEW
  win32:LIBS += -lglew32s
  CONFIG(mingw-cross-env):DEFINES += GLEW_STATIC
}