CGAL users discussion list

["Seow Hui, Saw" <>]

Hi Sebitas,

Maybe you can refer to this website:   http://acg.cs.tau.ac.il/cgal-at-tau/installing-cgal-and-related-programs-on-windows 

and follows the settings in number 7) Customizing env. 

Hope this helps.

Best Regards,
Saw

On Wed, Sep 12, 2012 at 12:40 AM, Philipp Moeller <> wrote:

sebitas <> writes:

>  Hello I installed cgal with macports and I was triying to run this example I
> found:
> #include <iostream>
>
> #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
> #include <CGAL/convex_hull_2.h>
>
> typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
> typedef K::Point_2 Point_2;
>
> int main()
> {
>     Point_2 points[5] = { Point_2(0,0), Point_2(10,0), Point_2(10,10),
> Point_2(6,5), Point_2(4,1) };
>     Point_2 result[5];
>
>     Point_2 *ptr = CGAL::convex_hull_2( points, points+5, result );
>     std::cout <<  ptr - result << " points on the convex hull" << std::endl;
>     return 0;
> }
>
> Nevertheless I get this linking errors .I am using xcode 4.3.2 and os 10.7.4
> . Regards
>
> Undefined symbols for architecture x86_64:
>   "___gmpq_init", referenced from:
>       CGAL::Gmpq_rep::Gmpq_rep()in main.o
>   "___gmpq_clear", referenced from:
>       CGAL::Gmpq_rep::~Gmpq_rep()in main.o
>   "___gmpq_set_d", referenced from:
>       CGAL::Gmpq::Gmpq(double)in main.o
>   "___gmpq_sub", referenced from:
>       CGAL::Gmpq::operator-=(CGAL::Gmpq const&)in main.o
>   "___gmpq_mul", referenced from:
>       CGAL::Gmpq::operator*=(CGAL::Gmpq const&)in main.o
>   "___gmpq_cmp", referenced from:
>       CGAL::Gmpq::operator<(CGAL::Gmpq const&) constin main.o
>   "___gmpq_equal", referenced from:
>       CGAL::Gmpq::operator==(CGAL::Gmpq const&) constin main.o
> ld: symbol(s) not found for architecture x86_64
> collect2: ld returned 1 exit status

You are not linking to GMP although macports ships a gmp enabled CGAL
installation. To add an additional library within XCode:
  Go to Project -> Edit Project -> Linking -> Other Linker Flags

and add -L/path/to/gmp/lib/ -lgmp

--
You are currently subscribed to cgal-discuss.
To unsubscribe or access the archives, go to
https://sympa.inria.fr/sympa/info/cgal-discuss

--

Best Regards,

Saw Seow Hui
Lecturer
Faculty of Information and Communication Technology
Department of Computer Science
University Tunku Abdul Rahman (UTAR)
Jalan Universiti, Bandar Barat,
31900 Kampar, Perak.