fltk backend and undefined gluOrtho2D

[John W. Eaton]

On 16-Jul-2009, Alexander Barth wrote:

| Hi all,
| I try to compile a recent checkout of octave (from
| http://www.octave.org/hg/octave). The compilation fails at:
| 
| ./DLD-FUNCTIONS/fltk_backend.cc: In member function $,1rx(Bvirtual void
| OpenGL_fltk::draw_overlay()$,1ry(B:
| ./DLD-FUNCTIONS/fltk_backend.cc:145: error: $,1rx(BgluOrtho2D$,1ry(B was not
| declared in this scope
| 
| I have fltk version 1.1.7. Is this version recent enough? On my system
| gluOrtho2D is declared in /usr/include/GL/glu.h but this file is not
| included in fltk_backend.cc.
| 
| Any help would be greatly appreciated!

On my system, /usr/include/GL/glu.h is part of the libglu1-mesa-dev
package, and the version of that package is 7.0.3.  I also have
version 1.1.9 of libfltk1.1-dev.  I don't see this error when building
Octave now, but I do remember seeing it at some point.  Unfortunately,
I can't remember what fixed the problem for me.

jwe