Find Closest Line Between Points In 2D By Least Squares

CMakeLists.txt:

cmake_minimum_required(VERSION 3.1...3.15)
project(CGAL_Test)

find_package(CGAL REQUIRED)
set(CMAKE_CXX_STANDARD 14)

find_package( VTK REQUIRED )
include( ${ VTK_USE_FILE } )

# Link with Boost.ProgramOptions (optional)
find_package(Boost QUIET COMPONENTS program_options)
if(Boost_PROGRAM_OPTIONS_FOUND)
  if(TARGET Boost::program_options)
    set(Boost_PROGRAM_OPTIONS_LIBRARY Boost::program_options)
  endif()
  if(CGAL_AUTO_LINK_ENABLED)
    message(STATUS "Boost.ProgramOptions library: found")
  else()
    message(
      STATUS "Boost.ProgramOptions library: ${Boost_PROGRAM_OPTIONS_LIBRARY}")
  endif()
  add_definitions("-DCGAL_USE_BOOST_PROGRAM_OPTIONS")
  list(APPEND CGAL_3RD_PARTY_LIBRARIES ${Boost_PROGRAM_OPTIONS_LIBRARY})
endif()

# Find Eigen3 (requires 3.1.0 or greater)
find_package(Eigen3 3.1.0)
include(CGAL_Eigen_support)

create_single_source_cgal_program( "main.cpp" "point.hpp" )

target_link_libraries(main PUBLIC CGAL::Eigen_support ${VTK_LIBRARIES})