[vtkusers] vtkOpenGLActor.cxx with HP-UX 11.0 & OpenGL

[Damian McGuckin]

We are having problems compiling vtkOpenGLActor.cxx on HP-UX 11.0 with
g++.  There is a problem because __thread, which is mentioned in the HP
OpenGL area (/opt/graphics/OpenGL/include/GL/glHpInt.h) is not defined
anywhere.  Note that this HP file has been automatically generated from
some other tool - don't you just love automation.

Has anybody else either seen this problem or know what __threads actually
is?

Thanks - Damian (McGuckin)

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