CGAL users discussion list

[Michael Vennettilli <>]

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