build: Remove embedded gl2ps. Require gl2ps as external dependency. * NEWS: Announce that gl2ps is no longer distributed with Octave. * build-aux/common.mk: New AC_SUBST macro GL2PS_LIBS. * configure.ac: When building native graphics, test for gl2ps.h header. If not found, print a warning and disable printing of FLTK figures. * libinterp/corefcn/gl2ps-renderer.cc, libinterp/corefcn/gl2ps-renderer.h: Only compile files if HAVE_GL2PS_H is true. * libinterp/dldfcn/__init_fltk__.cc(draw): Use #ifdef HAVE_GL2PS_H to either print figure, or issue a warning when gl2ps is not available. * libinterp/link-deps.mk: Add GL2PS_LIBS to libinter link dependencies * libinterp/corefcn/module.mk: Remove gl2ps.h, gl2ps.c from build system. * libinterp/corefcn/gl2ps.c, libinterp/corefcn/gl2ps.h: Removed from distribution.

--- a/NEWS	Tue Oct 29 16:29:46 2013 -0400
+++ b/NEWS	Tue Oct 29 15:16:23 2013 -0700
@@ -16,6 +16,12 @@
     Adding this command to your ~/.octaverc file will set the default
     for each session.
 
+ ** Printing or saving figures with OpenGL graphics requires the
+    gl2ps library which is no longer distributed with Octave.  The
+    software is widely available in most package managers.  If a
+    pre-compiled package does not exist for your system, you can find
+    the current sources at http://www.geuz.org/gl2ps/.
+
  ** Octave now supports nested functions with scoping rules that are
     compatible with Matlab.  A nested function is one declared and defined
     within the body of another function.  The nested function is only