I tried the following example of draw_polyhedron:
but there is the following error :
Impossible to draw because CGAL_USE_BASIC_VIEWER is not defined.
I solved it by adding to
QMAKE_CXXFLAGS +=-DCGAL_USE_BASIC_VIEWER LIBS+=-DCGAL_USE_BASIC_VIEWER
Another solution - put the line:
before all the CGAL includes in your