Linking a CGAL Library to Xcode

Question

I installed CGAL using macports. I run CMake with an example and it works fine. So I tried to create a new project and inserted the code that I need from the example. Therefore, I have not linked the CGAL libraries yet and have been unable to run the code. I am not sure how to link it in the build settings. Hope someone can help me.

I am trying to run the envelope2.cpp file.

Answer 1

You mentioned MacPorts, but here are the instructions for Homebrew. They should be pretty similar, but you may need to change some of the paths from /usr/local to /opt/local .

Install libraries

 brew install cgal 

Add includes

• Open the project settings.
• Select a project.
• Select the Build Settings tab.
• Select the All filter.
• Search for header search and you will find the correct setting:
• Double-click on the path (s) next to Header Search Paths
• Click the + button in the drop-down menu:
• Type /usr/local/include/ .
• Click outside the drop-down list to close it.

Add Libraries

• Open the project settings.
• Choose a goal.
• Select the General tab.
• In the Linked Frameworks and Libraries section, click the + button:
• A selection dialog box appears:
  
• Click the Add Other... button, and you will open a dialog box with an open file.
• Press Option + / to go to a specific directory:
• Type /usr/local/lib and press Go .
• Select the following files (hold Command while pressing the button to select more than one at a time):
  • libboost_thread-mt.dylib
  • libCGAL.dylib
  • libCGAL_Core.dylib
  • libgmp.dylib
  • libmpfr.dylib

Answer 2

If cgal installed on the system, the example/Envelope_2 (containing the CMakeLists.txt file) can be run as follows:

 cmake . make ./convex_hull 

Or to build outside the source:

 mkdir build cd build cmake .. make mv ../ch_points.dat . ./convex_hull 

This is OS X with cgal installed with brew, which is installed in /usr/local/... MacPorts may encounter a problem because it installs third-party packages in /opt .

According to How do I tell CMake to look for libraries installed by MacPorts? adding the following to the CMakeLists.txt file (before find_package ) may help

 list(APPEND CMAKE_LIBRARY_PATH /opt/local/lib) list(APPEND CMAKE_INCLUDE_PATH /opt/local/include)