[Octave-bug-tracker] [bug #47886] Do not link against libraries without OpenGL

[Mike Miller]

Follow-up Comment #7, bug #47886 (project octave):

As I re-read what I posted earlier, I think that I thought that the original
patch provided here is unsuitable.

We used to have a configure script that had dependencies on various libraries.
If configure did not detect OpenGL, then it wouldn't bother checking for FLTK,
and so on. We changed the configure script for 4.2 to eliminate those
hierarchical dependencies and make the logic more flat and straightforward,
and I think we want to preserve that approach.

With that in mind, a couple approaches that might work here:

1. add a "--without-gl2ps" option to configure
2. add more #if conditionals in the code to avoid compiling sections of code
that require *both* OpenGL and gl2ps, instead of just checking for HAVE_GL2PS

Other ideas?

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