re: PyQt5 question: why are QOpenGLTimeMonitor/QOpenGLTimerQuery not defined on armhf?

[Peter Michael Green <plugwash@debian.org>]

> But nowhere do I find any of QT_NO_OPENGL or QT_OPENGL_ES* defined in
> the package (but then maybe I'm not looking in the right place?  So I
> don't know why these two classes are included in the amd64 version of
> the package but not the armhf version.
>       
      The reason is that QT on armel/armhf is built for opengl ES rather
      than desktop opengl. I believe the reason for this is historic
      hardware support on armhf systems.