CGAL users discussion list

[Sylvain Pion <>]

 wrote:
> Good afternoon,
>
> I am trying the CGAL libraries to compute the Medial-Axis of a contour. I get
> that contour using OpenCV, and I have to use OpenCV. This is part of my tesis
> research work so I am really interested in completing my tests as soon as
> possible.
>
> Unfortunately, I think that there is some kind of incompatibility between
> OpenCV and CGAL and I can not figure out how to solve it.
>
> All the errors are related to the Assertions.h file:
>
> Example:
> \include\cgal\assertions.h(34) : error C2143: syntax error : missing '}' 
> before
> 'goto'

This line is:

enum Failure_behaviour { ABORT, EXIT, EXIT_WITH_SUCCESS, CONTINUE,
                        THROW_EXCEPTION };

What most probably happens is that OpenCV (or other software you use), defines
one of these names as a macro, which clashes with CGAL's enum.

One probable fix is to include CGAL's header first, before the other 
problematic
headers that defines the macro in question.
(and maybe suggest that OpenCV does not define macros with such general names:
good practice for libraries is to have macros with prefixes to avoid clashes)

--
Sylvain Pion
INRIA Sophia-Antipolis
Geometrica Project-Team
CGAL, http://cgal.org/

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