CGAL users discussion list

[Andreas Fabri <>]

Hello,

We use program options here 
https://github.com/CGAL/cgal/blob/master/Ridges_3/examples/Ridges_3/CMakeLists.txt

and you can see it getting compiled here 
https://cgal.geometryfactory.com/CGAL/testsuite/#Ridges_3

Hope this helps a little bit.

Best,

Andreas


On 7/25/2023 2:25 PM, Michael Vennettilli ( via 
cgal-discuss Mailing List) wrote:
> Hello,
>
> I am trying to use Boost's program options to read in parameters with 
> CGAL. I don't have much experience with CMake, and I am struggling to 
> include this library into my CMake compilation. I am using the 
> tutorial code from the beginning of Boost's tutorial. I can't get the 
> code to compile with the CMake files generated by CGAL.
>
> One complicating factor: I have two different versions of Boost 
> installed on my machine: version 1.71.0 was installed with something 
> like "sudo apt install libboost-dev", and I installed version 1.81 
> (which I intend to use for my CGAL work) in /usr/local/include.
>
> The code compiles successfully when I compile with g++ via "g++ 
> main.cpp -lboost_program_options". However, this uses program_options 
> from the older Boost version. I can make it use the newer version by 
> using "g++ main.cpp -L. 
> /usr/local/lib/libboost_program_options.so.1.80.0".
>
> I'm not sure how to translate this into CGAL and CMake. I generate 
> CMakeLists.txt using CGAL via
>
> cgal_create_CMakeLists -s main -c Qt5 -b program_options
>
> Then I enter the build directory and try making with
>
> cmake -DCMAKE_CXX_COMPILER=g++ -DCMAKE_CXX_STANDARD=17 
> -DCMAKE_BUILD_TYPE=Debug -DCGAL_Boost_USE_STATIC_LIBS=ON \
> -DBoost_DIR=/usr/local/lib/cmake/Boost-1.80.0 
> -DEIGEN3_INCLUDE_DIR=/usr/local/include/eigen3 .. && make
>
> This doesn't compile and gives errors as if I compiled directly with 
> g++ but not including the library. Checking the CMakeCache.txt, I see 
> that
>
> Boost_PROGRAM_OPTIONS_LIBRARY_RELEASE:STRING=/usr/local/lib/libboost_program_options.a 
>
>
> which is not the desired location. If I specify this variable by 
> including
>
> -DBoost_PROGRAM_OPTIONS_LIBRARY_RELEASE=/usr/local/lib/libboost_program_options.so.1.80.0 
>
>
> it shows the correct file in the cache, but the code still does not 
> compile.
>
> I am not sure how to get this to compile and would greatly appreciate 
> any assistance.
>
> Thank you,
>
> Mike
--
Andreas Fabri, PhD
Chief Officer, GeometryFactory
Editor, The CGAL Project