cmake/examples: add c++11 standard for multiprecision

examples/CMakeLists.txt

@@ -51,6 +51,10 @@ FOREACH(EXAMPLE ${${PROJECT_NAME}_EXAMPLES})
   ADD_PINOCCHIO_CPP_EXAMPLE(${EXAMPLE})
 ENDFOREACH(EXAMPLE ${${PROJECT_NAME}_EXAMPLES})
 
+IF(BUILD_ADVANCED_TESTING)
+  SET_PROPERTY(TARGET example-cpp-multiprecision PROPERTY CXX_STANDARD 11)
+ENDIF(BUILD_ADVANCED_TESTING)
+
 IF(BUILD_PYTHON_INTERFACE)
   SET(${PROJECT_NAME}_PYTHON_EXAMPLES
     inverse-kinematics