CGAL users discussion list

[Jan Legleitner <>]

Hello,

i am trying to use cgal in one of my Xcode projects. 

I made many attempts now since the last three days, but i always end up having many compilation errors, which are really hard to understand…

First i installed CGAL as stated here: https://doc.cgal.org/latest/Manual/usage.html by using home-brew:

brew install cgal

which worked perfectly and didn’t show any errors.

As i already set the user search paths to /usr/local/include and /usr/local/lib, i could directly use the CGAL headers in my project.

After trying some basic functions with the library i tried to do follow the surface reconstruction tutorial:

I figured out, that some functions would work and some not, for example:

CGAL::compute_average_spacing<CGAL::Sequential_tag> (points, 6);

would work perfectly with a list of points, but: 

CGAL::jet_smooth_point_set<CGAL::Sequential_tag> (points, 24);

would result in many errors like: “Static_assert failed due to requirement’!(boost::is_same<CGAL::GetSvdTraits…."

or: “No matching function for call to object of type ‘Monge_jet_fitting (aka ‘Monge_via_jet_fitting…..”

I followed this tutorial on installing CGAL in Xcode: https://3d.bk.tudelft.nl/ken/en/2016/03/16/using-cgal-and-xcode.html

but since CGAL is header only those libraries don’t exist anymore. 

To solve that problem, I could build CGAL with using cmake and add the missing libraries from that tutorial to my project, but this would not change anything.

If i download the examples folder and try to build with cmake, everything works perfectly. The only problem is,

that i don’t know what is missing for my Xcode project to use CGAL functions.

At the moment i added the following libraries to my Xcode 11.6 project:

- libboost_thread-mt.dylib

- libgmp.10.dylib

- libmpfr.6.dylib

And made the following changed to the project settings:

- Always Search User Paths (Deprecated): YES

- Header search paths: /usr/local/include

- Library Search paths /usr/local/lib /usr/local/Cellar/gmp/6.2.0/lib /usr/local/Cellar/mpfr/4.1.0/lib /usr/local/Cellar/boost/1.73.0/lib

- User header search paths: /usr/local/include

I also already tried to generate a Xcode project with cmake:

cmake -G Xcode <CGAL-5.0.3 path>

which created a Xcode project, but only containing CMakeLists.txt files in each target??

nothing was build and i could also not select any application to run in the settings..

I did not use cmake in the past many times...

I hope this is the right email address and somebody is already using CGAL with Xcode!

Thank you very much!!

best regards

Jan