OpenGL vs. Qt4 OpenGL

[Allen Winter]

On Thursday 13 December 2007 14:54:28 David Faure wrote:
> On Thursday 13 December 2007, Allen Winter wrote:
> > Howdy,
> > 
> > I don't think our buildsystem handles the OpenGL you can
> > build in Qt4 vs. the one that comes with a distro.
> 
> I don't understand. This isn't like libpng which can be part of Qt...
> OpenGL is not "part" of Qt, Qt only has OpenGL support when that's enabled.
> i.e. Qt itself uses the OpenGL that comes with your distro, and I guess KDE
> only uses Qt OpenGL (QGLWidget), otherwise KDE could make some opengl
> calls but couldn't display the result inside a QWidget... pretty useless.
> 

What is libQtOpenGL.so that I find in my qt-copy/lib?
And how does it differ from /usr/lib/libGL.so that I also find on my system?

kpat links against ${QT_QTOPENGL_LIBRARY}, which points to qt-copy/lib/libQtOpenGL.so

so this is why I'm confused.  I do have 2 separate OpenGL builds available.

should we permit stuff to build against QT_QTOPENGL?
so far, the only instance I've seen of this is in kpat