Fix target name in old CMake versions

bindings/python/CMakeLists.txt

@@ -1,8 +1,10 @@
 find_package(Python3 COMPONENTS Interpreter Development NumPy REQUIRED)
 message(STATUS "Using Python: ${Python3_EXECUTABLE}")
 
-cmake_policy(SET CMP0078 NEW)
-cmake_policy(SET CMP0086 NEW)
+if(${CMAKE_VERSION} VERSION_GREATER 3.14)
+    cmake_policy(SET CMP0078 NEW)
+    cmake_policy(SET CMP0086 NEW)
+endif()
 
 set_source_files_properties(../iDynTree.i PROPERTIES CPLUSPLUS ON)
 
@@ -13,6 +15,12 @@ swig_add_library(${target_name}
     LANGUAGE python
     SOURCES ../iDynTree.i)
 
+# Override target name in old CMake version. It can be removed when the
+# minimum CMake version is greater than 3.14.
+if(${CMAKE_VERSION} VERSION_LESS 3.14)
+    set(target_name iDynTree ${SWIG_MODULE_iDynTree_python_REAL_NAME})
+endif()
+
 target_link_libraries(${target_name} PUBLIC Python3::Python Python3::NumPy)
 
 set_target_properties(${target_name} PROPERTIES