CGAL users discussion list

Hi,

to remember:
if I want to compile all examples togehter - which
I do not want I have to write:
cmake -DCGAL_CXX_FLAGS="-frounding-math"
.

If I want to compile only one example i do not need
to write -DCGAL_CXX_FLAGS="-frounding-math"



Now I want to use and try some features of CGAL in
my existing project:

after

#include <CGAL/Point_3.h>
#include <CGAL/Vector_3.h>

and compiling with Netbeans IDE 6.5
I get following message:

build/Debug/GNU-Linux-x86/io/io.o: In function `Test_runtime_rounding_modes':
/usr/include/CGAL/Interval_nt.h:153: undefined reference
to `CGAL::assertion_fail(char const*, char const*, int, char const*)'
/usr/include/CGAL/Interval_nt.h:155: undefined reference
to `CGAL::assertion_fail(char const*, char const*, int, char const*)'
/usr/include/CGAL/Interval_nt.h:153: undefined reference
to `CGAL::assertion_fail(char const*, char const*, int, char const*)'
/usr/include/CGAL/Interval_nt.h:155: undefined reference
to `CGAL::assertion_fail(char const*, char const*, int, char const*)'


after going to declaration:

Interval_nt_h


  struct Test_runtime_rounding_modes {
    Test_runtime_rounding_modes()
    {
      // We test whether GCC's -frounding-math
option has been forgotten.
      // The macros CGAL_IA_MUL and
CGAL_IA_DIV stop constant propagation only
      // on the second argument, so
if -fno-rounding-math, the compiler optimizes
      // the 2 negations and we get
wrong rounding.
      typename Interval_nt<>::Internal_protector
P;
-->   CGAL_assertion_msg(-CGAL_IA_MUL(-1.1,
10.1) != CGAL_IA_MUL(1.1, 10.1),
               
         "Wrong rounding: did you forget
the -frounding-math option if you use GCC?");
      CGAL_assertion_msg(-CGAL_IA_DIV(-1,
10) != CGAL_IA_DIV(1, 10),
               
         "Wrong rounding: did you forget
the -frounding-math option if you use GCC?");
    }
  };


after goint to declaration:

assertions.h

    #if defined(CGAL_NO_ASSERTIONS)
    #  define CGAL_assertion(EX) (static_cast<void>(0))
    #  define CGAL_assertion_msg(EX,MSG)
(static_cast<void>(0))
    #  define CGAL_assertion_code(CODE)
    #else
    #  define CGAL_assertion(EX) \
       (CGAL::possibly(EX)?(static_cast<void>(0)):
::CGAL::assertion_fail( # EX , __FILE__, __LINE__))
--> #  define CGAL_assertion_msg(EX,MSG) \
       (CGAL::possibly(EX)?(static_cast<void>(0)):
::CGAL::assertion_fail( # EX , __FILE__, __LINE__, MSG))
    #  define CGAL_assertion_code(CODE)
CODE
    #endif // CGAL_NO_ASSERTIONS

The -frounding-math options is still a problem for
me. 
What can I do?


Cheers

Engineering Center Steyr GmbH & Co KG
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Geschaeftsfuehrer der geschaeftsfuehrenden Gesellschaft: Dipl. Ing. Franz
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