CGAL users discussion list

["Laurent Rineau (CGAL/GeometryFactory)" <>]

Le mercredi 22 mai 2013 10:37:59 Philipp Moeller a écrit :
> Ruud Vlaming 
> <>
>  writes:
> > Hello Guys,
> > 
> > When trying to compile open-scad, (which makes use of cgal)
> > for c++11 on mac i get an error. Hopefully you can help.
> > 
> > versions:
> >   mac:    10.8.3
> >   boost:  1.53.0 (via macports)
> >   cgal    4.2 (via macports)
> >   clang:  Apple LLVM version 4.2 (clang-425.0.27) (based on LLVM 3.2svn)
> > 
> > compile options (generated by qmake => cmake)
> > 
> >   /usr/bin/clang++
> >   
> >     -c
> >     -pipe
> >     -fno-strict-aliasing
> >     -std=c++11
> >     -stdlib=libc++
> >     -frounding-math
> >     -O2
> >     -arch x86_64
> >     -Xarch_x86_64
> >     -mmacosx-version-min=10.8
> >     -Wall
> >     -W
> > 
> > (see below for complete compile instruction and results)

In the CGAL infrastructure, I have added a configuration using that compiler 
and flags, on MacOS X. I can confirm the compilation error. More generally, 
we 
got a lot of compilation errors using that configuration, and we will try to 
fix that.

In the meantime, you can try Philipp's suggestion:

> > cgal related error:
> >   no viable conversion from 'Line_face_circulator'
> >   in lines 544, 577 and 593 of the file
> >   CGAL/Constrained_triangulation
> > 
> > Any idea how i can resolve this? Thanks for any help.
> 
> If I remember correctly this is triggered by a bug in clang when it
> comes to choosing an overload based on const-ness and a conversion
> operator.
> 
> Can you apply the following patch to
> Triangulation_line_face_circulator_2.h and check the result? I currently
> don't have access to an Apple version of clang to test this myself.
> 
> diff --git
> a/Triangulation_2/include/CGAL/Triangulation_line_face_circulator_2.h
> b/Triangulation_2/include/CGAL/Triangulation_line_face_circulator_2.h index
> cc43e76..fd7b989 100644
> --- a/Triangulation_2/include/CGAL/Triangulation_line_face_circulator_2.h
> +++ b/Triangulation_2/include/CGAL/Triangulation_line_face_circulator_2.h
> @@ -93,7 +93,7 @@ public:
>    Face*                   operator->() {return &*pos;}
>    Face&                   operator*() { return *pos;}
>    Face_handle             handle() {return pos;}
> -  operator const Face_handle() const {return pos;}
> +  operator Face_handle() const {return pos;}
>    bool  operator==(const Line_face_circulator& lfc) const;
>    bool  operator!=(const Line_face_circulator& lfc) const;
> 
> [...snipped rest of the message...]

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