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Hi Fernando,

I did delete CMakeCache.txt and then I run cmake .


this is the output for demo:

vallinpcts02:/usr/share/doc/libcgal-demo/demo# cmake .
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring  /usr/share/doc/libcgal-demo/demo/Alpha_shapes_2 demo
-- Looking for XOpenDisplay in /usr/lib/libX11.so;/usr/lib/libXext.so
-- Looking for XOpenDisplay in /usr/lib/libX11.so;/usr/lib/libXext.so - found
-- Looking for gethostbyname
-- Looking for gethostbyname - found
-- Looking for connect
-- Looking for connect - found
-- Looking for remove
-- Looking for remove - found
-- Looking for shmat
-- Looking for shmat - found
-- Looking for IceConnectionNumber in ICE
-- Looking for IceConnectionNumber in ICE - found
-- Found X11: /usr/lib/libX11.so
-- Looking for include files CMAKE_HAVE_PTHREAD_H
-- Looking for include files CMAKE_HAVE_PTHREAD_H - found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Configuring  /usr/share/doc/libcgal-demo/demo/Alpha_shapes_3 demo
-- Looking for Q_WS_X11
-- Looking for Q_WS_X11 - found
-- Looking for Q_WS_WIN
-- Looking for Q_WS_WIN - not found.
-- Looking for Q_WS_QWS
-- Looking for Q_WS_QWS - not found.
-- Looking for Q_WS_MAC
-- Looking for Q_WS_MAC - not found.
-- Found Qt-Version 4.4.3
-- Looking for _POSIX_TIMERS
-- Looking for _POSIX_TIMERS - found
-- Found QGLViewer: /usr/lib/libQGLViewer.so
-- Configuring  /usr/share/doc/libcgal-demo/demo/Apollonius_graph_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Arrangement_on_surface_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Boolean_set_operations_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Circular_kernel_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Circular_kernel_3 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Convex_hull_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Convex_hull_3 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Convex_hull_d demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Envelope_3 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Generator demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Geomview demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/GraphicsView demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Interpolation demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Kinetic_data_structures demo
-- Boost version: 1.34.1
-- Found the following Boost libraries:
--   program_options
-- Configuring  /usr/share/doc/libcgal-demo/demo/Largest_empty_rect_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Matrix_search demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Mesh_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Min_circle_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Min_ellipse_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Min_quadrilateral_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Nef_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Nef_3 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Nef_S2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/PDB demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Partition_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Polygon demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Polyhedron demo
-- Found QGLViewer: /usr/lib/libQGLViewer.so
-- Targetting Unix Makefiles
-- Using /usr/bin/c++ compiler.
-- Looking for sgemm_
-- Looking for sgemm_ - found
-- A library with BLAS API found.
-- Looking for cheev_
-- Looking for cheev_ - found
-- A library with LAPACK API found.
-- TAUCS libraries not found. Please specify libraries location.
-- warning: TAUCS is not found. parametrization will not be available.
-- Configuring  /usr/share/doc/libcgal-demo/demo/Polyhedron_IO demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Robustness demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Segment_Delaunay_graph_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Snap_rounding_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Spatial_searching demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Straight_skeleton_2 demo
--
QT3_LIBRARIES=/usr/lib/libqt-mt.so;/usr/lib/libSM.so;/usr/lib/libICE.so;/usr/lib/libX11.so;/usr/lib/libXext.so;dl;-lpthread
--
CGAL_LIBRARIES=/usr/lib/libCGAL_Qt3.so;/usr/lib/libCGAL_Core.so;/usr/lib/libCGAL.so
--
CGAL_3RD_PARTY_LIBRARIES=/usr/lib/libgmpxx.so;/usr/lib/libmpfr.so;/usr/lib/libgmp.so;/usr/lib/libboost_thread-mt.so;/usr/lib/libqt-mt.so;/usr/lib/libSM.so;/usr/lib/libICE.so;/usr/lib/libX11.so;/usr/lib/libXext.so;dl;-lpthread;/usr/lib/libGLU.so;/usr/lib/libGL.so;/usr/lib/libSM.so;/usr/lib/libICE.so;/usr/lib/libX11.so;/usr/lib/libXext.so
-- Configuring  /usr/share/doc/libcgal-demo/demo/Stream_lines_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Surface_mesher demo
-- Found QGLViewer: /usr/lib/libQGLViewer.so
-- Configuring  /usr/share/doc/libcgal-demo/demo/Triangulation_2 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Triangulation_3 demo
-- Configuring  /usr/share/doc/libcgal-demo/demo/Voronoi_diagram_2 demo
-- Configuring done
-- Generating done
-- Build files have been written to: /usr/share/doc/libcgal-demo/demo



this is the output for examples:

vallinpcts02:/usr/share/doc/libcgal-demo/examples# cmake .
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring  /usr/share/doc/libcgal-demo/examples/Algebraic_foundations
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Alpha_shapes_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Alpha_shapes_3 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Apollonius_graph_2 
example
-- Configuring 
/usr/share/doc/libcgal-demo/examples/Approximate_min_ellipsoid_d example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Arrangement_on_surface_2
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/BGL_arrangement_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/BGL_polyhedron_3 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/BGL_triangulation_2
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Boolean_set_operations_2
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Box_intersection_d 
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/CGALimageIO example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Circular_kernel_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Circular_kernel_3 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Circulator example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Convex_hull_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Convex_hull_3 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Core example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Envelope_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Envelope_3 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Filtered_kernel example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Generator example
-- Configuring  /usr/share/doc/libcgal-demo/examples/HalfedgeDS example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Interpolation example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Interval_skip_list 
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Jet_fitting_3 example
-- Targetting Unix Makefiles
-- Using /usr/bin/c++ compiler.
-- Looking for sgemm_
-- Looking for sgemm_ - found
-- A library with BLAS API found.
-- Looking for cheev_
-- Looking for cheev_ - found
-- A library with LAPACK API found.
-- LAPACK include:     
-- LAPACK definitions: -DLAPACK_USE_F2C
-- LAPACK libraries:   /usr/lib/liblapack.so
-- LAPACK link flags:  
-- BLAS include:     
-- BLAS definitions: -DBLAS_USE_F2C
-- BLAS libraries:   /usr/lib/libblas.so
-- BLAS link flags:  
-- Boost.ProgramOptions library: /usr/lib/libboost_program_options-mt.so
-- Configuring  /usr/share/doc/libcgal-demo/examples/Kernel_23 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Kinetic_data_structures
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Kinetic_framework example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Largest_empty_rect_2
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Matrix_search example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Mesh_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Min_annulus_d example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Min_circle_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Min_ellipse_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Min_quadrilateral_2
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Min_sphere_d example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Min_sphere_of_spheres_d
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Minkowski_sum_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Modular_arithmetic 
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Nef_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Nef_3 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Nef_S2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/PDB example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Partition_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Point_set_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Polygon example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Polyhedron example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Polyhedron_IO example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Polynomial example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Polynomial_kernel example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Polytope_distance_d
example
-- Configuring 
/usr/share/doc/libcgal-demo/examples/Principal_component_analysis example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Profiling_tools example
-- Configuring  /usr/share/doc/libcgal-demo/examples/QP_solver example
-- Configuring  /usr/share/doc/libcgal-demo/examples/RangeSegmentTrees example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Ridges_3 example
-- Targetting Unix Makefiles
-- Using /usr/bin/c++ compiler.
-- LAPACK include:     
-- LAPACK definitions: -DLAPACK_USE_F2C
-- LAPACK libraries:   /usr/lib/liblapack.so
-- LAPACK link flags:  
-- BLAS include:     
-- BLAS definitions: -DBLAS_USE_F2C
-- BLAS libraries:   /usr/lib/libblas.so
-- BLAS link flags:  
-- Boost.ProgramOptions library: /usr/lib/libboost_program_options-mt.so
-- Configuring  /usr/share/doc/libcgal-demo/examples/STL_Extension example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Segment_Delaunay_graph_2
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Skin_surface_3 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Snap_rounding_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Spatial_searching example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Spatial_sorting example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Straight_skeleton_2
example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Stream_lines_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Subdivision_method_3
example
-- Configuring 
/usr/share/doc/libcgal-demo/examples/Surface_mesh_parameterization example
-- USING CXXFLAGS = ' '
-- USING EXEFLAGS = ' '
-- Boost.ProgramOptions library: /usr/lib/libboost_program_options-mt.so
-- Targetting Unix Makefiles
-- Using /usr/bin/c++ compiler.
-- TAUCS libraries not found. Please specify libraries location.
-- NOTICE: This directory requires the TAUCS library, and some examples will
not be compiled.
-- Configuring 
/usr/share/doc/libcgal-demo/examples/Surface_mesh_simplification example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Surface_mesher example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Triangulation_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Triangulation_3 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Voronoi_diagram_2 example
-- Configuring  /usr/share/doc/libcgal-demo/examples/Width_3 example
-- Configuring done
-- Generating done
-- Build files have been written to: /usr/share/doc/libcgal-demo/examples


What can be the reason?
tx