[python] use Boost system.

CMakeLists.txt

@@ -80,7 +80,7 @@ ADD_PROJECT_DEPENDENCY(Boost REQUIRED)
 find_package(Boost REQUIRED COMPONENTS filesystem unit_test_framework chrono timer)
 if (BUILD_PYTHON_INTERFACE)
   FINDPYTHON()
-  set(BOOST_COMPONENTS python)
+  set(BOOST_COMPONENTS system python)
   search_for_boost()
 endif ()
 

python/CMakeLists.txt

@@ -98,7 +98,7 @@ SET(${LIBRARY_NAME}_SOURCES
   )
 
 ADD_LIBRARY(${LIBRARY_NAME} SHARED ${${LIBRARY_NAME}_SOURCES} ${${LIBRARY_NAME}_HEADERS})
-TARGET_INCLUDE_DIRECTORIES(${LIBRARY_NAME} SYSTEM PRIVATE "${Boost_INCLUDE_DIRS}" ${PYTHON_INCLUDE_DIRS})
+TARGET_INCLUDE_DIRECTORIES(${LIBRARY_NAME} SYSTEM PRIVATE ${PYTHON_INCLUDE_DIRS})
 TARGET_INCLUDE_DIRECTORIES(${LIBRARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}/src" "${CMAKE_CURRENT_BINARY_DIR}")
 IF(WIN32)
   TARGET_LINK_LIBRARIES(${LIBRARY_NAME} PUBLIC ${PYTHON_LIBRARY})
@@ -113,8 +113,10 @@ IF(ENABLE_DOXYGEN_AUTODOC)
 ENDIF()
 
 TARGET_LINK_BOOST_PYTHON(${LIBRARY_NAME} PUBLIC)
-TARGET_LINK_LIBRARIES(${LIBRARY_NAME} PUBLIC ${PROJECT_NAME} ${BOOST_system_LIBRARY})
-TARGET_LINK_LIBRARIES(${LIBRARY_NAME} PUBLIC eigenpy::eigenpy)
+TARGET_LINK_LIBRARIES(${LIBRARY_NAME} PUBLIC
+  ${PROJECT_NAME}
+  eigenpy::eigenpy
+  Boost::system)
 
 SET_TARGET_PROPERTIES(${LIBRARY_NAME} PROPERTIES
   PREFIX ""