rbdl: using eigen target instead of cmake variable

3rdParty/rbdl/CMakeLists.txt

@@ -159,7 +159,7 @@ ENDIF (RBDL_BUILD_STATIC)
 # Find and use the system's Eigen3 library
 
 FIND_PACKAGE (Eigen3 REQUIRED)
-target_include_directories(rbdl SYSTEM PUBLIC ${Eigen3_INCLUDE_DIR})
+target_link_libraries(rbdl PUBLIC Eigen3::Eigen)
 
 IF (RBDL_STORE_VERSION)
 	# Set versioning information that can be queried during runtime

3rdParty/rbdl/examples/simple/CMakeLists.txt

@@ -11,7 +11,7 @@ FIND_PACKAGE (RBDL REQUIRED)
 FIND_PACKAGE (Eigen3 3.0.0 REQUIRED)
 
 # Add the include directory to the include paths
-INCLUDE_DIRECTORIES ( ${RBDL_INCLUDE_DIR} ${EIGEN3_INCLUDE_DIR} )
+target_link_libraries(rbdl PUBLIC Eigen3::Eigen)
 
 # Create an executable
 ADD_EXECUTABLE (example example.cc)