CGAL users discussion list

["Laurent Rineau (GeometryFactory)" <>]

Le vendredi 02 octobre 2009 01:03:06, Jonathan Fisher a écrit :
> I'm developing an app which uses CGAL, and I am getting an assertion
> thrown in during initialization.  The explanation is: "Wrong rounding:
> did you forget the -frounding-math option if you use GCC?"
> 
> I installed CGAL using cmake (with the cmake-gui) following the
> instructions in the CGAL installation manual.  Can anyone suggest what
> I might look for in tracking down the problem? -- it would be much
> appreciated.
> 
> I have previously run the app without errors on a PowerPC platform,
> and I recently moved the app to an Intel Mac (with a new installation
> of CGAL).  I had had some trouble linking the app, getting error
> messages about undefined CGAL symbols (including symbols about
> assertions).  I got the build to complete without errors, and now I am
> getting the assertion thrown at runtime.
> 
> A minimal amount of grepping around in the makefiles indicates that
> the frounding-math option is on.

Can you give us your gcc version,  please? It can be displayed, in a console, 
with the following command line:
  gcc --version

Are you sure that the cxx flags contain -frounding-math? In the directory 
where 
you compiled your demo,  you can find the file CMakeCache.txt, which defines 
a 
lot of CMake variables. What is the content of CMAKE_CXX_FLAGS?

-- 
Laurent Rineau, PhD
Release Manager of the CGAL Project
http://www.cgal.org/
R&D Engineer at GeometryFactory
http://www.geometryfactory.com/