[Octave-bug-tracker] [bug #55883] Octave 5.1.0 fails to find QtOpenGL on macOS

[Mike Miller]

Follow-up Comment #10, bug #55883 (project octave):

Yeah I think for Octave 5.x, we don't want to make configure any more
complicated than it already is. I can build Octave with Qt 5.12 with the
QtOpenGL module available. Everything is configured, built, and linked
properly, just that the libQt5OpenGL library is overlinked into the
'__init_qt__.oct' module. That's a very minor issue and not worth fixing on
stable.

This bug appears on macOS because of an unknown reason so far, is it because
of a partial Qt 5.12 install? Is the QtOpenGL module removed from macOS
installs now for some reason? Agree that this can be easily worked around by
patching the configure script to bypass linking that module in.

For Octave 6, we can fix this bug by removing all references to QtOpenGL /
Qt5OpenGL in the configuration process and only testing for and using
QOpenGLWidget to vastly simplify maintenance of this going forward.

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