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Hi all,

I just have installed the CGAL on my machine, but it doesn't seem to be
working.

I did everything I was told to do on installation manual, and it seems that
there's no problem recognizing the libraries. I think I have to change some
environment, but I have no idea on what to change.

I have tried the following sample code;
examples/Convex_hull_2/ch_example_from_cin_to_cout.cpp
which is

=============
#include <CGAL/Cartesian.h>
#include <CGAL/ch_graham_andrew.h>

typedef   CGAL::Point_2<CGAL::Cartesian<double> >        Point_2;

int main()
{
  CGAL::set_ascii_mode(std::cin);
  CGAL::set_ascii_mode(std::cout);
  std::istream_iterator< Point_2 >  in_start( std::cin );
  std::istream_iterator< Point_2 >  in_end;
  std::ostream_iterator< Point_2 >  out( std::cout, "\n" );
  CGAL::ch_graham_andrew( in_start, in_end, out );
  return 0;
}
=============
I once commented out all lines in the main function except 'return 0'. And it
compiled.
But if I comment out all but the first and the last line in the main function,
it shows the following error.

==========================
/tmp/ccDDajNZ.o: In function `main':
conv.cpp:(.text+0x8b): undefined reference to
`CGAL::set_ascii_mode(std::basic_ios<char, std::char_traits<char> >&)'
collect2: ld returned 1 exit status
=========================

Any help?

Thanks