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[Jean-Marie Comets <>]

Hello all,

The following error showed up when compiling in "Debug" mode (GCC 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)) :

CGAL/Circular_kernel_3/Circular_arc_3.h: In constructor ‘CGAL::internal::Circular_arc_3<SK>::Circular_arc_3(const Point_3&, const Point_3&, const Point_3&)’:
CGAL/Circular_kernel_3/Circular_arc_3.h:219:2: error: ‘collinear’ is not a member of ‘CGAL’
CGAL/Circular_kernel_3/Circular_arc_3.h:219:2: note: suggested alternative:
CGAL/Kernel/global_functions_internal_2.h:242:1: note:   ‘CGAL::internal::collinear

Here's the code that I found there :

CGAL_kernel_precondition(!CGAL::collinear(begin, middle, end));

And here's a reduced version of my code which uses Circular_arc_3 (all the headers are displayed) :

#include <CGAL/Spherical_kernel_3.h> // for compare_theta_z

// ...

template <typename Kernel>
struct Comp_theta_z_3
{
  typedef typename Kernel::Sphere_3 Sphere_3;
  typedef typename Kernel::Circular_arc_point_3 Circular_arc_point_3;

  bool operator()(const Circular_arc_point_3 & left,
      const Circular_arc_point_3 & right, const Sphere_3 & sphere) const
  { return CGAL::compare_theta_z(left, right, sphere); }

  // ...

};

I found that adding "#include <CGAL/Kernel/global_functions_3.h>" before the Spherical_kernel_3 fixes the problem.

Good day,

Jean-Marie Comets