cmake: set CXX standard to C++11 when required

CMakeLists.txt

@@ -100,6 +100,12 @@ IF(BUILD_WITH_URDF_SUPPORT)
   LIST(APPEND CFLAGS_DEPENDENCIES "-DPINOCCHIO_WITH_URDFDOM")
 ENDIF(BUILD_WITH_URDF_SUPPORT)
 
+IF(${URDFDOM_VERSION} VERSION_GREATER "0.4.2")
+  SET(CMAKE_CXX_STANDARD 11)
+  SET(CMAKE_CXX_STANDARD_REQUIRED ON)
+  MESSAGE("-- Since urdfdom >= 1.0.0, the default C++ standard is C++11. The project is then compiled with C++11 standard.")
+ENDIF(${URDFDOM_VERSION} VERSION_GREATER "0.4.2")
+
 IF(BUILD_WITH_AUTODIFF_SUPPORT)
   ADD_REQUIRED_DEPENDENCY("cppad >= 20180000.0")
 ENDIF(BUILD_WITH_AUTODIFF_SUPPORT)